THE INHERITANCE OF RESISTANCE TO METALAXYL AND TO FLUOROPHENYLALANINE IN MATINGS OF HOMOTHALLIC PHYTOPHTHORA-SOJAE

被引：38

作者：

BHAT, RG

MCBLAIN, BA

SCHMITTHENNER, AF

机构：

[1] Ohio Agricultural Research and Development Center, Ohio State University, Wooster, Ohio

来源：

MYCOLOGICAL RESEARCH | 1993年 / 97卷

关键词：

D O I：

10.1016/S0953-7562(09)81164-7

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Interracial hybrids of metalaxyl-resistant, fluorophenylalanine-sensitive (MEX(r)FPA(s)) and metalaxyl-sensitive, fluorophenylalanine-resistant (MEX(s)FPA(r)) parents of Phytopkthora sojae and 101 F2 progeny from one hybrid were evaluated in vitro for inhibitor sensitivity. Genetic evidence confirmed that a slow-growing single-oospore culture selected on a double-inhibitor germination medium from a MEX(s)FPA(r)race 1 x MEX(r)FPA(s)race 3 cross was indeed a sexual hybrid. Analysis of F2 progeny indicated that a single gene (Mex) governing MEX-resistance was incompletely dominant whereas a gene (Fpa) for FPA-resistance was fully dominant. Mex and Fpa genes and race 1 and race 3 virulence traits were inherited independently. These data confirm the usefulness of selectable phenotypic markers for studying the genetics of Phytophtkora through the sexual cycle.

引用

页码：865 / 870

页数：6

共 29 条

[1] EXTRANUCLEAR CHLORAMPHENICOL RESISTANCE MUTATIONS IN THE BASIDIOMYCETE SISTOTREMA-BRINKMANNII [J].