Unequal segregation of SRK alleles at the S locus in Brassica cretica.
In the Brassicaceae plant family, which includes the Arabidopsis and Brassica genera, self-incompatibility (SI) is controlled by genes at the S locus. Using experimental crosses, we studied the pattern of inheritance of S-locus alleles in the wild species Brassica cretica. Four full-sib families were established and unequal segregation of alleles at the SRK SI gene was found in one family. The segregation distortion acted in favour of a recessive (class II) allele and was best explained by some form of gametic-level selection. Our findings are discussed in the light of theoretical predictions of differential accumulation of deleterious mutations among S-locus alleles.
Edh
Kristina
K
Department of Cell and Organism Biology, Lund University, Sölvegatan 29, SE-22362, Lund, Sweden.
Widén
Björn
B
Ceplitis
Alf
A
D000483:Alleles; D001937:Brassica / Q000235:genetics*; D017343:Genes, Plant; D006023:Glycoproteins / Q000235:genetics*; D008957:Models, Genetic; D010940:Plant Proteins / Q000235:genetics*
D006023:Glycoproteins; D010940:Plant Proteins; C064156:self-incompatibility locus specific glycoprotein, Brassica