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Highly divergent sequences of the pollen self‐incompatibility ( S ) gene in class‐I S haplotypes of Brassica campestris (syn. rapa ) L
Author(s) -
Watanabe Masao,
Ito Akiko,
Takada Yoshinobu,
Ninomiya Chie,
Kakizaki Tomohiro,
Takahata Yoshihito,
Hatakeyama Katsunori,
Hinata Kokichi,
Suzuki Go,
Takasaki Takeshi,
Satta Yoko,
Shiba Hiroshi,
Takayama Seiji,
Isogai Akira
Publication year - 2000
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(00)01514-3
Subject(s) - brassica rapa , brassica , biology , genetics , gene , phylogenetic tree , haplotype , pollen , allele , locus (genetics) , botany
Self‐incompatibility (SI) enables flowering plants to discriminate between self‐ and non‐self‐pollen. In Brassica , SI is controlled by the highly polymorphic S locus. The recently identified male determinant, termed SP11 or SCR, is thought to be the ligand of S receptor kinase, the female determinant. To examine functional and evolutionary properties of SP11 , we cloned 14 alleles from class‐I S haplotypes of Brassica campestris and carried out sequence analyses. The sequences of mature SP11 proteins are highly divergent, except for the presence of conserved cysteines. The phylogenetic trees suggest possible co‐evolution of the genes encoding the male and female determinants.