Temat: pollination - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Intra- and interspecific pollination between Lupinus albus L., Lupinus mutabilis Sweet. and Lupinus angustifolius L.
Autorzy:: Przyborowski, J A
Samborska-Ciania, A
Wiwart, M
Powiązania:: https://bibliotekanauki.pl/articles/2047267.pdf
Data publikacji:: 1996
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Lupinus angustifolius
white lupin
Lupinus mutabilis
pollen tube
pollen germination
Andean lupin
interspecific pollination
growth
intraspecific pollination
Lupinus albus
blue lupin
Opis:: The pollen grain germination and the growth of pollen tubes after intra- and interspecific reciprocal pollination of Lupinus albus L., L. mutabilis Sweet, and L. angustifolius L. were examined. Results of microscopic observations of pollen grain germination and pollen tube growth enable to deny the existence of certain barriers that prevent fertilization after pollination of L. albus flowers with pollen of L. angustifolius and vice versa, as well as after pollination of L. mutabilis flowers with pollen of L. angustifolius and vice versa. Some delay in pollen grain germination and a slower growth of pollen tubes were observed in all combinations, as related to intraspecific ones, though in the case of each interspecific combination pollen tubes reached the ovary. Moreover, a different level of pollination efficiency (the number of growing pollen tubes) and various rates of pollen grain germination and pollen tube growth, depending on the direction of pollination, were found. The noted pollination efficiency may generally be considered to be low.
Źródło:: Journal of Applied Genetics; 1996, 37, 3; 261-275
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A comparison of anther culture and maize pollination for haploid production in wheat
Autorzy:: Fedak, G
Burvill, M
Voldeng, H D
Powiązania:: https://bibliotekanauki.pl/articles/2046608.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: plant production
haploid production
F1 hybrid
green plant
growth regulator
wheat
pollination
haploid
anther culture
maize
Opis:: The use of 2,4-D as a post pollination treatment to fertilize florets instead of GA₃ provided a two-fold improvement in seed set, culturable embryos and hence green plant production from wheat and maize pollination. The efficiency of the wheat by maize pollination method for haploid production was equal to the anther culture method in F₁ hybrid combinations that were responsive to anther culture. However, in recalcitrant combinations obtained from non-responsive genotypes the maize pollination method was far superior.
Źródło:: Journal of Applied Genetics; 1997, 38, 4; 407-414
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Rice improvement, involving altered flower structure more suitable to cross-pollination, using in vitro culture in combination with mutagenesis
Autorzy:: Min, S K
Powiązania:: https://bibliotekanauki.pl/articles/2048292.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: japonica rice
radiation
China
mutagenesis
mutant
anther culture
in vitro
cross-pollination
hybridization
indica rice
somatic cell
Oryza sativa
rice
Opis:: Anther and somatic tissue culture in combination with mutagenesis were carried out to evaluate the efficiency of different mutagenic treatments of various in vitro culture materials, and to obtain some promising variants for rice improvement. Results indicated that in japonica rice radiation treatment of dry seeds and young panicles influenced the percentage of green plantlets regeneration from anther culture. Both treatments increased significantly the percentage of regenerated green plantlets in comparison with the control. Irradiation with 30 Gy of rice callus increased also the percentage of regenerated green plantlets. For indica rice, the combination of the suitable dose of gamma rays irradiation on seeds and an improved medium, increased the percentage of callus induction. This approach made it possible to use anther culture in indica rice breeding. Somatic tissue cultures combined with radiation-induced mutagenesis led to the development of a number of promising mutants including some new cytoplasm-nucleus interacting male-sterile lines with almost 100% stigma exsertion. Their development would be of practical significance for increasing the genetic diversity for production of hybrid rice.
Źródło:: Journal of Applied Genetics; 1998, 39, 2; 151-162
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Meiosis and fertility in spontaneous tetraploids of Festuca pratensis [Huds.]
Autorzy:: Wisniewska, H
Powiązania:: https://bibliotekanauki.pl/articles/2048194.pdf
Data publikacji:: 1995
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Festuca pratensis
grain
fertility
Lolium perenne
plant genetics
pollination
chromosome configuration
spontaneous tetraploid
germination
Lupinus luteus
colchicine
meiosis
chromosome pairing
polyploidization
Opis:: The paper is the second part of the studies on spontaneous tetraploids of Festuca pratensis, morphological characters of which were given in the previous article (WIŚNIEWSKA 1994). This paper deals with meiosis in PMCs of spontaneous tetraploids of Festuca pratensis and their F₁ progeny (2n=28) and describes the fertility of these plants in comparison to that of the colchitetraploid cv. Westa and diploid cv. Skrzeszowicka. Different chromosome parings were found in three spontaneous tetraploids. In tetraploid 4/2, most frequently quidrivalents (5.72 IV per 1 PMC) were observed, whereas in tetraploids 465/2 and 534/2, bivalents were prevailing (5.36 and 5.65 II per cell, respectively). The rest of chromosomes remained as univalents, formed trivalcnts and uncountable chromosome associations. Spontaneous tetraploid plants had dehiscent anthers and a high pollen grain fertility (from 78.0 to 94.5%). The degree of seed setting at self-pollination in these plants was low. However, at open pollination, they set a little less seeds than the diploid cv. Skrzeszowicka and the cv. Westa. The plant Si obtained from selfed of spontaneus tetraploids were all tetraploids (2n=28). Seeds obtained from open pollination of spontaneous tetraploids, gave rise to 160 plants of F₁ and all were also tetraploid. No large differences in chromosome pairing.were observed in plants of F₁. At metaphase I a predominant number of bivalents (from 4.72 to 6.05 II) and a smaller number of quadrivalents (from 3.96 to 4.63 IV), were observed. All the plants of F₁ and S₁ generations had dehiscent anthers. Pollen grain viability of Fi plants was high (88.0-90.0%) and similar to that of the parental forms (78.0-89.5%) in the same year of the studies. The average seed setting of all studied F₁ plants at self-pollination ranged from 0.15 to 0.22%, being lower than that of the parental forms. At open pollination it ranged from 34.2 to 36.0%, which was higher than or similar to that of the parental forms in the same year.
Źródło:: Journal of Applied Genetics; 1995, 36, 3; 205-213
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki