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Association of the cyanogenic loci in white clover trifolium repens



Association of the cyanogenic loci in white clover trifolium repens



Genetical Research 40(1): 65-72



The inheritance of cyanogenesis in T. repens is governed by 2 unlinked genes, Ac/ac and Li/li which determine the presence/absence of cyanogenic glucosides and their hydrolyzing enzyme linamarase, respectively. Plants possessing dominant alleles at both loci release hydrogen cyanide when their leaves are damaged. Analysis of phenotype frequencies in 10 natural populations showed a significant positive association in phenotypic state between these 2 loci within populations. Taking into account the results of a subsidiary study which showed no significant deviation from random mating in a natural population of T. repens, the most likely explanation for the observed association in phenotypic state is selection favoring the cyanogenic phenotype.

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Accession: 004791158

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