Highly divergent sequences of the pollen self-incompatibility (S) gene in class-I S haplotypes of Brassica campestris (syn. rapa) L. - Watanabe, ,M.,.; Ito, ,A.,.; Takada, ,Y.,.; Ninmiya, ,C.,.; Kakizaki, ,T.,.; Takahata, ,Y.,.; Hatakeyama, ,K.,.; Hinata, ,K.,.; Suzuki, ,G.,.; Takasaki, ,T.,.; Satta, ,Y.,.; Shiba, ,H.,.; et al. (FEBS Lett., 2000)