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Wyświetlanie 1-15 z 1570
Tytuł:
Jakość mięsa jagniąt-tryczków typu corriedale w porównaniu z ich mieszańcami F1 po trykach ras plennych
Kachestvo mjasa baranchikov tipa korridel v sravnenii s ikh pomesjami ot baranov plodovitykh porod
Meat quality of corriedale ram-lambs as compared to their crosses with rams of fertile breeds
Autorzy:
Niznikowski, R.
Janikowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/799617.pdf
Data publikacji:
1988
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
hodowla zwierzat
owce
owca corriedale
mieszance F1
wartosc poubojowa
tryki
jagnieta
mieso owcze
jakosc
ocena jakosci
rasy zwierzat
plennosc
tucz zwierzat
animal breeding
sheep
Corriedale breed
cross hybrid
ram
lamb
sheep meat
meat quality
quality assessment
fertile line
animal breed
Opis:
Соответствующие исследования проводились в сельскохозяйственной опытной станции Пучнев на материале 45 баранчиков. Тридцать ягнят происходило от товарного скрещивания овец корридель с баранами финской и фризской породы (обе опытные группы насчитывали по 15 голов), сравниваемых с отечественными корриделями. Животных откармливали до веса тела 40 кг, а затем их убивали и оценивали тканевый состав тушек путем диссекции окорока, а также определяли питательные достои - ства мяса. Самое высокое содержание мяса установлено в окороках баранчиков как типа корридель так и их помесей с фризскими овцематками. Самое малое ожирение мяса было у помесей корриделя с финской молочной овцой. Не наблюдались существенные различия в физических признаках мяса (pH, окраска, водопоглотимость). Содержание сухого вещества и общего дира было самым высоким в мясе помесей корриделя с финской овцой. Относительно общего белка не обнаружено статистически существенных различий.
The respective investigations were carried out at the Agricultural Experiment Station Puczniew on 45 ram-lambs. Thirty lambs originated from commercial crossing of Corriedale sheep with East-Friesian and Finnish rams and 15 lambs constituted Corriedale sheep. All animals were fattened to the liveweight of 40 kg,, then slaughtered and the hind leg was dissected to determine the tissue composition of the carcass. Thereupon the quality of meat was estimated. The highest content of lean meat in the hind leg of lamb was found in the Corriedale ram-lambs and in those originating from F₁ crosses with the East-Friesian sheep. The lowest fat content was found in lambs of the crosses of Corriedale ewes with East-Friesian rams. No significant differences in the physical traits of meat of particular experimental groups has been proved. The content of dry matter and crude fat was the highest in the lean meat of crosses of Corriedale ewes with Finnish rams. No significant differences have been foud, either, in the crude protein content in the lean meat.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1988, 352
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Masa ciała i wartość rzeźna jagniąt z dwóch mięsnych linii owiec
Ves tela i ubojnoe kachestvo jagnjat ovec mjasnogo tipa
Body weight and slaughter value of lambs of the meat-type sheep
Autorzy:
Sliwa, Z.
Slosarz, P.
Powiązania:
https://bibliotekanauki.pl/articles/798688.pdf
Data publikacji:
1988
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
hodowla zwierzat
genetyka zwierzat
linie hodowlane
krzyzowanie zwierzat
linie miesne
wzrost zwierzat
maciorki
tryczki
owce
wydajnosc rzezna
mieszance
animal breeding
animal genetics
body weight
slaughter value
lamb
sheep
meat-type sheep
hybrid
animal growth
meat breed
breeding line
Opis:
Соответствующие исследования касались роста ягнят ярочек и баранчиков третьего поколения синтетически выводимых мясных линий овец. В обеих линиях генетическое участие показывали польские мериносы, велькопольская овца и восточно-фризская овца, а сверх того в группе А овцы трех мясных пород: Берришон дю Шер, Иль де Франс и Тексель (белоголовая линия), а в группе Б овцы породы Суффольк (черноголовая линия). Ягнята обеих линий характеризовались в сравнении с польским мериносом на 12% высшими привесами тела в период от рождения до возраста 28 дней. Помеси от черноголовой линии (75% генетического участия породы Суффольк) отличались высокими привесами, особенно в период 28-100 дней (около 300 г в сутки). Тушки ягнят-помесей от обеих линий более мясистые и меньше ожиренные, чем тушки мериносовых ягнят.
The respective investigations concerned the growth of ewe- and ram-lambs originating from the third generation of synthetically bred meat-type lines of sheep. In both lines the genetic share showed Polish Merino sheep, Wielkopolska sheep and East-Friesian sheep and moreover in the A group - the sheep of three meat-type lines: Berrichon du Cher, Ile de France and Texel ("white-head" line) and in the В group - the sheep of Suffolk breed ("black-head" line). Lambs from the both lines showed, as compared to the Polish Merino sheep,the body weight gains by 12% higher in the period from birth to the age of 25 days. The crosses from the "black-head" line (75% of share of the Suffolk breed) distinguished themselves with higher body weight gains, particularly in the period from 28 to 100 days (about 30 g a day). The carcasses of lambs-crosses in both lines were more meaty and less fatty than those of Merino lambs.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1988, 352
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ zachwaszczenia na plonowanie dwóch mieszańców kukurydzy uprawianych na kiszonkę
Vlijanie zasorenija na urozhai dvukh gibridov kukuruzy vozdelyvaemykh na silos
Weediness effect on yielding of two maize hybrids cultivated for silage
Autorzy:
Szalezniak, E.
Powiązania:
https://bibliotekanauki.pl/articles/798429.pdf
Data publikacji:
1988
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
uprawa roslin
kukurydza
mieszance
uprawa na kiszonke
plonowanie
chwasty
zachwaszczenie lanu
plony
straty plonu
weediness
yielding
maize
plant hybrid
plant cultivation
silage
field
loss
Opis:
В микроделяночных опытах проведенных в 1981-1982 гг. на опытном поле Кэмпа в Пулавах, сравнивали развитие и динемику прироста массы и урожаи двух гибридов кукурузы на силос (ЛГ 5 и Кб 270) пропалываемых вручную или химически или непропалываемых. Засорение приводило к значительному снижению массы кукурузы углубляющемуся с продвижением роста до свыше 70% по отношению к варианту ручной прополки и достигающему минимума в фазе завязывания семян сорняками. Затем, по мере созревания кукурузы различия как в общих урожаях сухой массы, так и урожаях початков между прополотыми и непропоолотыми вариантами сокращались. Урожай сухой массы початков показывал более сильное снижение, чем урожай целых растений. Сорняки сильнее ограничивали урожаи гибрида Кб 270, чем гибрида ЛГ 5.
Growth, mass increment dynamics and yielding of two silage maize hybrids (LG 5 and Kb 270) weeded manually or chemically and unweeded were compared in the microplot experiments carried out in 1981 and 1982 on an experimental field Kępa at Puławy. Weediness resulted in a very considerable maize mass drop, which deepened along the growth to over 70% in relation to the treatment of manual weeding and reached its maximum at the stage of weed seed formation. Then, along with ripening cf maize the differences both in total dry matter yields and yields of cobs between weeded and weedy treatments decreased. The dry matter yield of cobs showed a greater decrease than the yield of whole plants. Weeds reduced to a higher degree yields of the Kb 278 hybrid than those of the LG 5 hybrid.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1988, 349
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wstępna ocena wzrostu i wskaźników użytkowości wełnistej maciorek rasy czarnogłówka, owcy kamienieckiej i ich mieszańców, pochodzących od przystępek pokrytych w wieku 10 miesięcy
Produktivnost' vostochno-frizsrikh ovcematok i ikh potomstva F1 posle pol'skogo merinosa i vel'skopol'skoj ovcy
Productivity of East-Friesian ewes and of the F1 progeny after the Polish Merino ram and Wielkopolska ewe
Autorzy:
Wojtowski, J.
Gut, A.
Powiązania:
https://bibliotekanauki.pl/articles/803911.pdf
Data publikacji:
1988
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
hodowla zwierzat
genetyka zwierzat
owce
owca czarnoglowka
owca kamieniecka
mieszance
rasy zwierzat
uzytkowosc welnista
maciorki
wzrost zwierzat
zywienie zwierzat
animal breeding
animal breed
animal genetics
animal productivity
sheep
East-Friesian breed
ewe
F1 population
progeny
Polish Merino breed
ram
Wielkopolska breed
hybrid
animal growth
wooliness
Opis:
От ярок покрытых в 10-месячном возрасте были получены ягнята овечки оцениваемые в четырех группах: I - каменецкая овца (длинношерстная) , II - помеси каменецкой овцы с баранами черноголовой породы, III - помеси Черноголовки с баранами каменецкой овцы, IУ -черноголовая пррода. Розницы в весе тела в 3- и 6-месячном возрасте не были существенными. Однако наиболее тяжелыми были овцематки группы II (22,40 и 37,40 кг). Подобно не установлено существенных разниц в оцениваемых показателях шерсти, за исключением длины шерсти. В длине шерсти помеси групп III и II показывали более высокие значения, чем животные группы 1У и лишь незначительно низшие значения, чем животные группы I. Самой высокой продуктивностью в ягневой стрижке в 8-месячном отроете отличались ягнята группы I (3,20 кг), а посредственной - ягнята групп II и III. В оценке толщины шерсти (группа IУ 29,77, а группа II 34,27 мм) и в разрывной длины шерсти (группа II 5,68, а группа III 6,97 км) не установлено существенных статистических различий.
Gimmers obtained from primapara ewes covered at the 10-month age were estimatec in four groups: I - Kamieniecka (long-wooled) sheep, II - crosses of Kamieniecka ewes and "black-head" rams, III - crosses of "black-head" ewes and Kamieniecka rams, IV - "black-head" sheep. Body weight differences at the age of 3 and 6 months were insignificant, still the heaviest proved to be ewes of the group II (22.40 and 37.40 kg). Similarly no significant differences in the estimated wool indices, except for wool grading, were found. In the wool grading the crosses from the group III and II showed higher values than those of the group IV and only slightly than those of the group I. The highest lamb shearing productivity in the 8-month regrowth were obtained in the group I (3.20 kg) and medium ones in the groups II and III. In estimation of the wool thickness (group IV 29.77 and group П 34.20 pm and in the breaking lenth of bunches (group II 5.68, group III 6.97 km) no statistical differences were found.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1988, 352
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Melibiose-fermenting osmotolerant Saccharomyces cerevisiae hybrids
Osmotolerancyjne hybrydy drożdży Saccharomyces cerevisiae fermentujące melibiozę
Autorzy:
Szopa, J.S.
Gańczyk, B.
Kowal, K.
Zwoliński, G.
Powiązania:
https://bibliotekanauki.pl/articles/1401989.pdf
Data publikacji:
1990
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
melibiose fermentation
S. cerevisiae
hybrid
osmotolerance yeasts
Opis:
A haploid generation of opposite mating types a and was isolated from sporulating S. cerevisiae industrial yeasts. Haploid yeasts fermenting melibiose and osmotolerant haploids were selected from the C-2 strain used in the production of dried yeasts. It was found that all melibiose-fermenting haploids belong to mating type a. Hybrids were obtained combining features of the parent yeasts G67 and C-2. The selected hybrid CG 3225/2, fermenting melibiose and growing in a medium with 50% glucose, displays features characteristic for baker's yeast: a suitable activity in anaerobie metabolism of maltose and saccharose, and a good biomass yield a molasses medium.
Do konstrukcji diploidalnych, osmotolerancyjnych mieszańców fermentujących melibiozę, wykorzystano przemysłowe rasy drożdży stosowane zarówno w gorzelnictwie (rasa G67) jak i do propagacji drożdży piekarskich (C-2). Wyosobniono pokolenie haploidalne drożdży o przeciwnych typach koniugacyjnych a i α oraz wyselekcjonowano klony fermentujące melibiozę i haploidy osmotolerancyjne. Stwierdzono, że wszystkie wyodrębnione z worków szczepu G67 klony fermentujące melibiozę należą do typu koniugacyjnego a. Haploidy pochodzące ze szczepu C-2 odznaczały się stosunkowo dobrym wzrostem w pożywce z 50% zawartością glukozy. W wyniku krzyżowania haploidalnych kultur drożdży o przeciwnych typach koniugacyjnych, otrzymano 63 mieszańce, które łączą cechy szczepów rodzicielskich. Wyselekcjonowany hybryd CG3225/2 fermentujący melibiozę i rosnący w pożywce z 50% dodatkiem glukozy, ma cechy typowe dla przemysłowych drożdży piekarskich, tzn. odpowiednią aktywność w przemianie beztlenowej maltozy i sacharozy oraz dobrą wydajność biomasy w pożywce melasowej.
Źródło:
Acta Alimentaria Polonica; 1990, 16(40), 3-4; 97-107
0137-1495
Pojawia się w:
Acta Alimentaria Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena uszkodzeń plemników metodą pozakomórkowego oznaczania aktywności enzymów w świetle wartości nasienia knurków
Ocenka povrezhdenijj spermatozoidov po vnakletochnomu metodu opredelenija aktivnosti ehnzimov v svete kachestva semeni khrjachikov
Spermatozoa injuries estimation by the method of extracellular activity determination of enzymes as exemplified by the value of young boar semen
Autorzy:
Kocwin-Podsiadla, M.
Wejksza, D.
Polanska, E.
Powiązania:
https://bibliotekanauki.pl/articles/800870.pdf
Data publikacji:
1990
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
plemniki
aktywnosc enzymatyczna
nasienie
knurki
rasa wbp
rasa duroc
mieszance wielorasowe
ejakulat
spermatozoon
enzyme activity
semen
boar
young animal
Polish Large White breed
Duroc breed
multibreed hybrid
pig
ejaculate
Opis:
Целью труда было определение связи между активностью энзимов в плазме семени 6-месячных хрячков и его качеством выраженным количественными параметрами и показателями микроскопной оценки в рамках трех породных групп: крупной белой польской породы (32 головы), породы дюрок (29 голов) и многопородных помесей (22 головы) содержимых в Гибридизационном центре Павливице. Биохимическая оценка семени была выражена активностью энзимов в его плазме (AspAT, ALAT, LDH и АР). Среди анализируемых биохимических тастов плазмы семени, свидетельствующих о степени повреждения сперматозоидов, не был найден универсальный тест, который смог бы касаться хотя бы одного параметра количественной и микроскопной оценки для всех исследуемых породных групп. Характерными и специфическими представляются высокие коэффициенты корреляции для связи между активностью AspAT и ALAT в плазме семени с одной стороны и движением массы сперматозоидов (r = -0,57** , -0,67**) и общим числом сперматозоидов в эякуляте (r = -0,45* и -0,75**) и между активностью LDH и концентрацией и процентом живых сперматовоидов (r = -0,67** и -0,61**) с другой стороны для хрячков породы дюрок, семя которых характеризовалось самыми низкими значениями в проведенной оценке. Была получена прямая эависимость между активностью LDH и процентов живых сперматозоидов (r = 54*) в рамках помесных храчков. Рост процента сперматозоидов с основании изменениями связан с пониженной активностью LDH в плазме семени (r = -0,40*).
The aim of the work was to find the relationship between the activity of enzymes in the semen plasma of the 6-month boars and its value expressed in terms of quantitative parameters and microscopic estimation indices within the framework of three breed groups: Polish Large White (32 heads), Duroc (29 heads) and polybred hybrids (22 heads) at the Hybridization Centre of Pawłowice. The biochemical assessment of the semen was expressed in terms of activity of enzymes in its plasma (AspAT, AlAT, LDH and Ap). In analyzed biochemical tests of the semen plasma concerning the spermatozoid injury degree no universal test, which could concern at least one parameter of the quantitative and microscopic estimation for all breed groups, has been found. Characteristic and specific seem to be the obtained high coefficients of correlation for the relationship between the AspAT and AlAT activity in the semen plasma, spermatouoa mass movement (r = -0.57**, -0.67**) and total number of spermatozoa in the ejaculate (r = -0.45* and -0.75**) on the one hand and the AlAT activity and concentration and per cent of living spermatozoa (r = -0.67** and -0.61**) for the Duroc boars, the semen of which appeared to be the worst in the ejaculate, on the other. A simple relationship between the LDK activity and the per cent of living spermatozoa (r = 54*) within the group of hybrid boars has been obtained. Increase of the per cent of spermatozoa with basic changes is connected with a lowered LDH activity in the semen plasma (r = -0.40*).
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1990, 384
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Amphidiploid hybrids of Trifolium pratense L. [2n=14 and 2] with T.diffusum Ehrh. [2n=16]
Autorzy:
Strzyzewska, C
Powiązania:
https://bibliotekanauki.pl/articles/2048137.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chromosome
Trifolium diffusum
Trifolium pratense
hybrid
interspecific hybrid
plant breeding
genetic variation
Opis:
After duplicating the chromosome number by colchicine in sterile F₁ 16-chromosome hybrid T. pratense × T. diffusum some partially fertile plants with 32 chromosomes were found. Male fertility (viability of pollen grain) was from 69.3% to 86.2% (on average 81.8%), whereas female fertility estimated as seed setting after cross- and self-pollination was 21.8% and 6.9%, respectively. Male and female fertility as well as somatic chromosome number were examined in the F₂-F₄ generations. Selection for female fertility resulted in increasing seed setting in the first two generations (F₂ and F₃) and in decreasing it in F₄ generation. An average seed setting in the F₂-F₄ generations after cross-pollination amounted to 22.2%, 43.6% and 12.9%, respectively; after self-pollination it was 25.2%, 27.6% and 1.9%. In the F₂ generation all the plants had 2n=32 chromosomes. In the next generations there appeared aneuploids, among which 30-chromosome individuals were predominant.
Źródło:
Journal of Applied Genetics; 1995, 36, 2; 147-154
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anatomical characteristics of hypocotyl of sugar beets different in sugar content
Autorzy:
Sliwinska, E
Dziamski, A.
Steen, P.
Powiązania:
https://bibliotekanauki.pl/articles/2048151.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cell size
plant genetics
vascular tissue
sucrose concentration
Beta vulgaris
root yield
genotype
sugar content
hybrid
tracheid
central core
xylem
hypocotyl
parenchyma cell
phloem
sugar-beet
Opis:
Six seedling hypocotyl anatomical characters of sugar beet diploid lines and triploid hybrids were measured. Root yield and sugar content of these lines and hybrids were evaluated in replicated field trials. Some of the studied hypocotyl characters: the diameter of the central core, the diameter of parenchymatic cells outside the central core and the width of xylem, correlated negatively with sugar content and positively with root yield. This suggests that these parameters can be used in preliminary selection of sugar-beet breeding material. Introducing such criteria into the breeding process could speed up the selection and reduce the number of expensive field trials.
Źródło:
Journal of Applied Genetics; 1995, 36, 3; 229-239
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cytoembryology of infertile segregants of the hybrid Lupinus varius L. x L. digitatus Forsk
Autorzy:
Kazimierska, E M
Kazimierski, T.
Powiązania:
https://bibliotekanauki.pl/articles/2048189.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Lupinus digitatus
cytoembryology
embryology
interspecific hybrid
plant genetics
gametophyte
sterility
vacuolation
sporophyte
megasporogenesis
megagametogenesis
chromosome
Lupinus varius
hybrid
sporogenic cell
Opis:
In F₂, F₃ and F₄ generations of one hybrid line of Lupinus varius × L. digitatus, segregation into infertile and fertile plants in the ratio 3:1 was observed. Cytoembryological analyses showed that sterility was caused by irregularities in megasporocyte formation, in megasporogenesis and megagametogenesis. The following abnormalities lead to female sterility: no megasporogenic cells separated in nucelluses; in other nucelluses with megaspore mother cells, these cells underwent vacuolation and died before reduction division. In the megaspore mother cells, in which probably meiosis occurs, the megasporocyte division is irregular; a restitution nucleus is frequently formed after reduction division and such megasporocyte develops into an embryo sac. In 8-nucleate embryo sacs a change in the nucellus polarization was observed, while in rarely encountered embryo sacs the embryo cells underwent vacuolation and then died. Female sterility in the studied segregants is determined genetically, whereas sterilization of reproduction cells is a developing process throughout the period of sporocyte and female gametophyte formation.
Źródło:
Journal of Applied Genetics; 1995, 36, 3; 215-227
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Embryo-callus regenerated hybrids and amphidiploids of barley cultivars x rye inbred lines
Autorzy:
Wojciechowska, B
Pudelska, H.
Powiązania:
https://bibliotekanauki.pl/articles/2048197.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rye
embryo culture
barley
intergeneric hybrid
meiotic pairing
Opis:
In the presented hybridization programme of barley cultivars and rye inbred lines including 48 cross combinations the seed set ranged from 3.13 to 92.98%, while embryos were formed in 0.74 to 36.36% in successful pollinations. Sixty five plants were generated by embryo callus culture and one - by embryo culture without callus formation. The hybrids had somatic chromosome numbers 2n=14 (60 plants) and 2n=28 (6 plants). Plants obtained via embryo callus culture showed good vegetative vigour and well-developed root system. Spike morphology of all plants resembled that of rye. Meiosis in 17 diploids showed 0.13-0.63 barley-barley and rye-rye bivalents with a chiasma frequency of 0.14-0.69 per cell. The heteromorphic bivalent-like configurations occurred in five plants in 0.01-0.02 per cell. The amphidiploids had 7.79-10.71 barley-barley and rye-rye bivalents with a chiasma frequency of 9.36-17.75 per cell. All plants, with 14 and 28 chromosomes, were completely sterile both in backcrosses and when selfed.
Źródło:
Journal of Applied Genetics; 1995, 36, 4; 313-323
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrids of Trifolium pratense L. [2n - 14 plus 2] with T. diffusum Ehrh. [2n - 16] and other 16-chromosome Trifolium species
Autorzy:
Strzyzewska, C
Powiązania:
https://bibliotekanauki.pl/articles/2048130.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Trifolium diffusum
Trifolium pratense
hybrid
interspecific hybrid
sterility
meiosis
Opis:
16-chromosome forms of red clover (2n=14+2) were crossed to six Trifolium species with the chromosome number 2n=16. Hybrid plants were derived from the cross of a stable 16-chromosome red clover T. pratense with T. diffusum (2n=16). No seeds were obtained from reciprocal crosses. F₁ hybrid plants were morphologically more similar to T. diffusum, whereas their other characters, e.g. flower number per head, were intermediate between the species crossed. All F₁ hybrids had the chromosome number 2n=16. Meiosis proceeded with large irregularities. The average number of bivalents per cell was 3.32, and that of univalents - 9.98. Univalents exhibited a high stickiness and frequently formed "end-to-end" configurations and chains consisting of about a dozen of so chromosomes. Bivalents were straight. Lagging chromosomes and chromosome bridges were observed during AI; lagging chromosomes were also found during AII. After an equalizing division, tetrads and different from them microspore polyads were formed. 16-chromosome hybrids were male- and female-sterile. No hybrids were obtained from the stable 16-chromosome red clover T. pratense (n=7 chromosomes) crossed to the selected clover species (T. apertum Bobr., T. alexandrinum L. and others) with n=8 chromosomes.
Źródło:
Journal of Applied Genetics; 1995, 36, 1; 35-42
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inheritance of light-cream coloration of vegetative plant organs in yellow lupin [Lupinus luteus L.]
Autorzy:
Kazimierska, E M
Kazimierski, T.
Powiązania:
https://bibliotekanauki.pl/articles/2048143.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
yellow lupin
inheritance
flower
dilutus gene
Lupinus luteus
organ
hybrid
lupin
leaf
plant
homozygous plant
Opis:
The inheritance of light-cream coloration of vegetative parts in yellow lupin plants was studied. It was found that this trait is inherited monomerically. In homozygous system the gene responsible for light-cream coloration has a plieotropic action. Among others it causes a lower fertility and reduction of seed yield per plant. In heterozygous system symptoms of heterosis are observed. In many aspects the action of dilutus gene is similar to that of dwarf gene in yellow lupin previously described by the authors of this paper.
Źródło:
Journal of Applied Genetics; 1995, 36, 2; 137-146
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anther culture response in F1 hybrids of winter wheat [Triticum aestivum L.]
Autorzy:
Ponitka, A
Slusarkiewicz-Jarzina, A
Powiązania:
https://bibliotekanauki.pl/articles/2047258.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
haploid production
plant regeneration
F1 hybrid
green plant
cold treatment
albino plant
wheat
anther structure
hybrid
Triticum aestivum
winter wheat
somatic embryo
Opis:
The effect of cold pretreatment of spikes on somatic embryo induction and anther culture response of 25 F₁ winter wheat hybrids was investigated. The efficiency of androgenic embryos was the highest when spikes were incubated at 4°C for 6-9 days. A total of 2242 (73.0%) green and 885 (27.0%) albino plants were obtained from 9900 cultured anthers. Anther culture response in wheat was found to be markedly affected by the genotype of donor plants. The percentage of green plants varied from 0 to 115.7%. A great majority of anther-derived regenerants were haploids (82.35%), while the remaining plants were spontanoeus diploids (13.73%) and aneuploids (3.92%).
Źródło:
Journal of Applied Genetics; 1996, 37, 3; 253-260
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interspecific and intergeneric hybrids of the Lolium - Festuca complex obtained in Poland in the years 1964-1994 and maintained in the collection at the Institute of Plant Genetics in Poznan
Autorzy:
Zwierzykowski, Z
Powiązania:
https://bibliotekanauki.pl/articles/2047713.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Polska
wide hybridization
interspecific hybrid
intergeneric hybrid
collection
Lolium
Festuca
Opis:
In the years 1964-1994 an extensive programme of wide hybridization within Ihe. Lolium-Festuca complex was carried out in Poland. Six Lolium (ryegrass) and five Festuca (fescue) species at different ploidy level were used for crosses. Hybrids were obtained from 72 cross combinations: 19 interspecific (five Lolium × Lolium and 14 Festuca × Festuca), 51 intergeneric (39 Lolium × Festuca and 12 Festuca × Lolium) and two trispecific (Lolium × Festuca × Festuca), most of them being derived from crosses of four important forage grass species: Lolium multiflorum, L. perenne, Festuca pratensis and F. arundinacea. Interspecific and intergeneric Lolium-F estuca hybrids from 50 cross combinations are maintained at present in the collection of the Institute of Plant Genetics in Poznań. This article presents a complete list of Lolium-Festuca hybrids obtained in Poland in the years 1964-1994 and maintained in the collection. The available literature concerning these hybrids is cited.
Źródło:
Journal of Applied Genetics; 1996, 37, 1; 79-100
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transfer of chromosomes of the A and B genomes of wheat to tetraploid rye
Autorzy:
Apolinarska, B
Powiązania:
https://bibliotekanauki.pl/articles/2047251.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chromosome transfer
translocation
rye
substitution
addition
tetraploid triticale
wheat
crossing
hybrid
B genome
A genome
tetraploid rye
Opis:
Tetraploid rye was crossed with different tetraploid triticale lines. The F₁ generation of tetraploid rye × tetraploid triticale hybrids was backcrossed with 4x rye. After backcrossing, all BC₁-F₁ plants were subjected to open pollination, whereas in the BC₁-F₂ generations only plants with wheat chromosomes in their karyotypes were open-pollinated. Substitution, addition and addition-substitution lines of wheat chromosomes in tetraploid rye were isolated from the F₂ and F₃ of BC₁. In 60 plants of BC₁-F₂, 59 chromosomes from the A genome and 9 from the B genome of wheat were recovered. The wheat chromosomes were monosomic except for five plants which were disomic, viz. 1A and 5A in two plants each, and a translocated 3AS/5AL in one plant. In 235 BC₁-F₃ plants, 174 wheat addition and substitution chromosomes were found, 143 from the A genome and 31 from the B genome. All wheat chromosomes except 3A from the A genome and four chromosomes from the B genome - 2B, 3B, 5B and 7B were recovered. The number of substitutions ranged from one to four per plant, only two plants having four. In the group of addition plants the number of added wheat chromosomes ranged from one to two, and in the case of addition-substitution plants — from two to four. Wheat chromosomes occurred in monosomic form, except 10 plants. Six substitution plants were disomic for 1 A, 2A, 5A, 7A, 2B and 3B, respectively. One was disomic for 1A and 5A in two addition plants. Two addition-substitution plants were double disomic: 1A and 5A - in one, and 1A and 3B in the other. In the BC₁-F₃ generation, 23 different translocations were found, four of which occurred between wheat chromosomes and the remaining 19 - between wheat and rye chromosomes. Translocated chromosomes were monosomic, except four plants. Two of them were disomic for 3AS/4RL, one for 4AS/4RS and one for 7AS/7RS. The fertility of both addition and substitution plants ranged from 0 to 38.0 seeds/spike, regardless of the chromosome number, with a mean of 9.61 seeds/spike. Plants with 28 chromosomes showed singnificantly higher fertility than plants with 29 and more chromosomes, except additoion plants with chromosomes 5A and 5B. The analysis of the influence of particular wheat chromosomes on plant fertility showed that both substitution and addition plants with chromosome 6A had the highest average fertility, while plants with chromosome 2B in substitution lines as well as plants with chromosome 2A in addition and addition-substitution lines had the lowest fertility.
Źródło:
Journal of Applied Genetics; 1996, 37, 4; 345-356
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 1570

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