Temat: Phytophthora infestans - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Resistance to Phytophthora infestans in diploid and tetraploid potato families. 2. Resistance in tubers
Autorzy:: Swiezynski, K M
Flis, B
Osiecka, M
Sieczka, M T
Zarzycka, H
Powiązania:: https://bibliotekanauki.pl/articles/2046604.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Phytophthora infestans
tetraploid potato
genotype
resistance
potato
tuber
diploid potato
Opis:: The tuber reaction to Phytophthora infestans was evaluated in individual genotypes of four diploid and four tetraploid potato families, their parents and standard cultivars. The genotypes were tested several times. Two testing methods were used, based on evaluation of tuber slices or whole tubers, respectively. All inoculations were done with MP 245, a fungus isolate with a broad virulence spectrum. If the reaction of tuber slices was evaluated, the distribution of genotypes in several families deviated considerably from a normal one. In some distributions more than one peak was detectable, indicating segregation of major genes. Genotypes transgressive in resistance were found in four families. If the reaction of whole tubers was evaluated, the distribution of genotypes did not deviate significantly from a normal one. Genotypes transgressive in resistance were found in one family. The tuber reaction to P. infestans depended to a large extent on testing conditions.
Źródło:: Journal of Applied Genetics; 1997, 38, 1; 33-44
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Sexuality of Phytophthora infestans and the role of oospores as a primary infection source of potato late blight
Autorzy:: Zarzycka, H
Sobkowiak, S.
Powiązania:: https://bibliotekanauki.pl/articles/65920.pdf
Data publikacji:: 1999
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Phytophthora infestans
oospore
potato late blight
pathogen
sexuality
sexual reproduction
potato
Opis:: Results of experiments with isolates A1 and A2 from populations occurring in Poland in the years 1993-1998 were compared. Mating types A1 and A2 did not significantly differ with respect of virulence spectrum, pathogenicity level and virulence diversity (Shannon index). After pairing isolates A1 and A2 formed oospores; their morphological characteristics were described. On selected fields a test was performed whether the oospores could play a role as a source of primary infection. Local populations occurring on three fields were characterized. Results obtained on investigated 3 separate fields, located in 2 voivodeships of southern Poland were compared. It was stated on the basis of the proportion of both mating type isolates, race complexity and diversity, that oospores could play a role as a source of primary infection, at least in one of localities in Boguchwała, podkarpackie voivodeship.
Drugi typ kojarzeniowy A2 został wykryty w Polsce w 1988 roku. Porównanie spektrum wirulencji i poziomu agresywności u izolatów obu typów kojarzeniowych A1 i A2 zebranych w latach 1993-1998 wykazało, że oba typy kojarzeniowe nie różnią się między sobą istotnie. Typ A2 nie stanowi większego bezpośredniego zagrożenia dla ziemniaka niż typ A1, lecz odgrywa rolę w procesie rozmnażania generatywnego. Oospory wytworzone w tkankach ziemniaka po skojarzeniu obu typów P. infestans mogą stać się, po przezimowaniu w glebie, drugim, obok zakażonych bulw, źródłem infekcji pierwotnej P. infestans. Aby odpowiedzieć na pytanie, czy oospory odgrywają rolę w wywołaniu infekcji pierwotnej, na polach ziemniaka dokonano scharakteryzowania lokalnych populacji P. infestans na 3 plantacjach ziemniaka. Porównanie wzajemnego stosunku izolatów obu typów kojarzeniowych oraz ocena złożoności i zróżnicowania ras wykazała, że oospory mogły być źródłem infekcji pierwotnej na polu w Boguchwale (woj. podkarpackie). Na innych polach patogen prawdopodobnie rozmnażał się na drodze wegetatywnej.
Źródło:: Journal of Plant Protection Research; 1999, 39, 2
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Resistance to Phytophthora infestans in diploid and tetraploid potato families. 1. Resistance in detached leaflets
Autorzy:: Swiezynski, K M
Domanski, L
Osiecka, M
Sieczka, M T
Zarzycka, H
Powiązania:: https://bibliotekanauki.pl/articles/2046603.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: tetraploid potato
Phytophthora infestans
inoculation
genotype
resistance
potato
detached leaflet
diploid potato
Opis:: Potato families, segregating for resistance to Phytophthora infestans, were tested repeatedly to evaluate the distribution of resistance to P. infestans, the repeatability of testing results and correlation between resistance and some other characters. Four diploid and four tetraploid families were evaluated together with their parents and with potato cultivars used as standard. For all inoculations a virulent fungus isolate MP 245 was used. Leaflets were collected from plants growing in the field (summer tests) or in a glasshouse (autumn and spring tests). Segregation of major genes determining resistance was detectable in most families. In families originating from mating a resistant parent with a susceptible partner some progeny genotypes with resistance level of the resistant parent could be identified. In families originating from two parents showing only some resistance, a transgression of resistance could be found in the progeny. The expression of resistance depended on testing conditions. Some genotypes were consistently superior or inferior in resistance under all testing conditions, but often repeated evaluations of genotypes did not provide consistent results and significant interactions genotypes x tests were detectable.
Źródło:: Journal of Applied Genetics; 1997, 38, 1; 19-32
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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