EVIDENCE FOR A MULTI-ALLELIC HETEROKARYON INCOMPATIBILITY (HET) LOCUS DETECTED BY HYBRIDIZATION AMONG 3 HETEROKARYON-COMPATIBILITY (H-C) GROUPS OF ASPERGILLUS-NIDULANS

被引:14
作者
DALES, RBG [1 ]
MOORHOUSE, J [1 ]
CROFT, JH [1 ]
机构
[1] UNIV BIRMINGHAM,SCH BIOL SCI,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
关键词
ASPERGILLUS-NIDULANS; H-C GROUPS; HET GENES; HETEROKARYON INCOMPATIBILITY; MULTI-ALLELIC HET LOCUS; VEGETATIVE INCOMPATIBILITY;
D O I
10.1038/hdy.1993.77
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
A strain of heterokaryon-compatibility (h-c) group A was crossed sexually to strains of h-cB and h-cGL of Aspergillus nidulans. A back-crossing programme established that there were seven hetero-allelic heterokaryon compatibility (het) genes controlling somatic incompatibility between strains of h-cA and h-cB. A similar back-crossing programme between strains of h-cA and h-cGL confirmed that these two groups differ at six het loci. Previous work has shown that h-cB differs from h-cGL at two het loci, hetA on linkage group V and hetB on linkage group VI. As an allelic difference at a single het locus is enough to cause two strains to be heterokaryon incompatible, 15 alleles spread over seven het loci are necessary to explain the h-cA, h-cB, h-cGL triangular compatibility relationship. One het locus is multi-allelic and this locus must be either hetA or hetB.
引用
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页码:537 / 543
页数:7
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