Journal Article

Interspecific Pairs of Class II <i>S</i> Haplotypes Having Different Recognition Specificities between <i>Brassica oleracea</i> and <i>Brassica rapa</i>

Yutaka Sato, Keiichi Sato and Takeshi Nishio

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 47, issue 3, pages 340-345
Published in print March 2006 | ISSN: 0032-0781
Published online March 2006 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pci250
Interspecific Pairs of Class II S Haplotypes Having Different Recognition Specificities between Brassica oleracea and Brassica rapa

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  • Biochemistry
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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.

Keywords: Brassica oleracea; Brassica rapa; Diversification; Interspecific pairs; Recognition specificity; Self-incompatibility; HV, hypervariable region; RT–PCR, reverse transcription–PCR; SLG, S locus glycoprotein; SP11, S locus protein 11; SRK, S locus receptor kinase

Journal Article.  3739 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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