VIRULENCE HETEROZYGOSITY AND GAMETIC PHASE DISEQUILIBRIA IN 2 POPULATIONS OF PUCCINIA-RECONDITA (WHEAT LEAF RUST FUNGUS)

被引：32
作者：
KOLMER, JA
机构：
[1] Research Scientist, Agriculture Canada Research Station, Winnipeg MB, R3T2M9
来源：
HEREDITY | 1992年 / 68卷
关键词：
PUCCINIA-RECONDITA; RESISTANCE GENES; WHEAT LEAF RUST; TRITICUM; VIRULENCE HETEROZYGOSITY;
D O I：
10.1038/hdy.1992.73
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
Random mating aecial populations were derived from the eastern and prairie uredinial populations of Puccini recondita f. sp. tritici in Canada to assess the degree of virulence heterozygosity and gametic phase disequilibria between virulence loci in the two populations. In the aecial generation. both populations were genetically polymorphic at virulence loci that had low levels of phenotypic polymorphism in the uredinial generation. Different levels of genetic polymorphism for virulence allowed further discrimination between the two populations. High levels of virulence heterozygosity were detected in both populations to resistance genes originally derived from Triticum aestivum. Genetic linkage, and gametic phase disequilibria between genetically independent virulence loci were detected in both populations. However, disequilibrium were stronger and more prevalent in the highly selected prairie population.
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页码：505 / 513
页数：9
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