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Genetic population genetical models of identification of s genotype in plants with gametophytic type of incompatibility



Genetic population genetical models of identification of s genotype in plants with gametophytic type of incompatibility



Genetika 25(12): 2234-2241



A population-genetical model proposed permits to describe random pollination within inbred populations segregated at k S loci, with one of them linked to a marker locus (aA). The plants heterozygous for k S loci produced no seeds. S-genotypes of these plants are identical with those of a plant stock of inbred population (incompatible to total pollen pool). The share of compatible pollen for other plants was determined by a number of homozygous S loci. In the progeny of these plants two types of segregation at the marker locus are observed: a) monohybrid segregation; b) different deviations from monohybrid segregation. The latter has been detected in plants heterozygous for the S locus linked to a marker. Deviation from monohybrid segregation has been detected in homozygous plants for the S locus linked to a marker. The value of deviation depends on: a) the number of homozygous S loci; b) the coefficient of recombination between the marker and S loci. In this way, correspondence between the plant S genotype at I1 and segregation for a marker locus at I1G1 generations is demonstrated. The method of identification of S genotyeps in platns with gametophytic type of self- and cross-incompatibility is designed the population-genetical method 3.

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Accession: 007374643

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