title: Interspecific pairs of class II S haplotypes having different recognition specificities between Brassica oleracea and Brassica rapa.
abstract: There are several pairs of similar class I S haplotypes between Brassica oleracea and Brassica rapa. The similar S halotypes in these interspecific pairs have been reported to have the same recognition specificities. In the present study, three interspecific pairs showing a high sequence similarity were found in class II S haplotypes, i.e. between BoS-2b (B. oleracea S-2b) and BrS-44 (B. rapa S-44), between BoS-5 and BrS-40, and between BoS-15 and BrS-60. By pollination tests using interspecific hybrids between B. oleracea and B. rapa, BoS-5 and BoS-2b were revealed to have slightly and completely different recognition specificities from those of BrS-40 and BrS-44, respectively. The recognition reaction between SP11 and SRK of BoS-15 was suggested to be incomplete. The regions of class II SP11 and SRK important for self-recognition specificity and the diversification of class II S haplotypes are discussed herein.
authors.affiliation: Graduate School of Agricultural Science, Tohoku University, Sendai, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Sato
authors.forename: Keiichi
authors.initials: K
authors.lastname: Sato
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nishio
mesh_terms: D000483:Alleles; D000595:Amino Acid Sequence; D001483:Base Sequence; D001937:Brassica / Q000235:genetics* / Q000502:physiology*; D029741:Brassica rapa / Q000235:genetics* / Q000502:physiology*; D006023:Glycoproteins / Q000378:metabolism; D006239:Haplotypes / Q000235:genetics*; D006720:Homozygote; D008969:Molecular Sequence Data; D010940:Plant Proteins / Q000737:chemistry / Q000378:metabolism; D011058:Pollen / Q000378:metabolism; D011494:Protein Kinases / Q000737:chemistry / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D013045:Species Specificity
chemical_list: D006023:Glycoproteins; D010940:Plant Proteins; C431526:SP11 protein, Brassica; C064156:self-incompatibility locus specific glycoprotein, Brassica; D011494:Protein Kinases; C079832:S-receptor kinase