Comparison of the genome structure of the self-incompatibility (S) locus in interspecific pairs of S haplotypes.

Genetics
Ryo FujimotoT Nishio

Abstract

The determinants of recognition specificity of self-incompatibility in Brassica are SRK in the stigma and SP11/SCR in the pollen, both of which are encoded in the S locus. The nucleotide sequence analyses of many SRK and SP11/SCR alleles have identified several interspecific pairs of S haplotypes having highly similar sequences between B. oleracea and B. rapa. These interspecific pairs of S haplotypes are considered to be derived from common ancestors and to have maintained the same recognition specificity after speciation. In this study, the genome structures of three interspecific pairs of S haplotypes were compared by sequencing SRK, SP11/SCR, and their flanking regions. Regions between SRK and SP11/SCR in B. oleracea were demonstrated to be much longer than those of B. rapa and several retrotransposon-like sequences were identified in the S locus in B. oleracea. Among the seven retrotransposon-like sequences, six sequences were found to belong to the ty3 gypsy group. The gag sequences of the retrotransposon-like sequences were phylogenetically different from each other. In Southern blot analysis using retrotransposon-like sequences as probes, the B. oleracea genome showed more signals than the B. rapa genome did. These find...Continue Reading

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Citations

Jan 21, 2010·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Juliane MittaschCarsten Milkowski
May 6, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Takahiro TochigiTakeshi Nishio
Nov 13, 2010·Plant Cell Reports·Taku SasakiTakeshi Nishio
Nov 15, 2012·Genome Research·Jun WuShaoling Zhang
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Feb 16, 2010·BMC Evolutionary Biology·Haining LinC Robin Buell
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Feb 1, 2014·Molecular Breeding : New Strategies in Plant Improvement·Fangqin Zeng, Bifang Cheng
Mar 5, 2008·Current Opinion in Plant Biology·Mikkel Heide Schierup, Xavier Vekemans
Apr 1, 2008·The New Phytologist·Bicheng YangSusanne Barth
Jul 6, 2014·Breeding Science·Hiroyasu Kitashiba, June B Nasrallah
Apr 12, 2007·The Plant Journal : for Cell and Molecular Biology·Shunsuke OkamotoTakeshi Nishio

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