Department of Horticultural Science, University of Minnesota, St. Paul, Minnesota, USA.
Theor Appl Genet. 1973 Jan;43(1):1-5. doi: 10.1007/BF00277824.
Self incompatibility was investigated in the hexaploid garden chrysanthemum, a member of Compositae. Nine sibling clones selected from a highly compatible cross were all self incompatible. 14.8% of the crosses between these sibs in diallel were compatible, but one sib, 67-111-42, accounted for 10 of the 12 compatible crosses. 67-111-42 was also more compatible than the remaining 8 sibs in crosses to other closely related plants. Crosses of the 9 sibs to 12 unrelated tester clones indicated that none were male or female sterile. Inbreeding via pseudocompatibility was successful in increasing homozygosity at the S loci. The percentage of compatible crosses obtained in 3 sib diallels of I 2 clones from crosses of 67-111-42I 1 plants approached that of the original 9 × 9 diallel, but no one individual accounted for most of the compatible crosses. It was possible to separate the 9 sibs into 9 incompatibility patterns from the pollinations made in this study. The evidence suggests that the self-incompatibility reaction in the garden chrysanthemum is sporophytic and involves more than 1 locus.
自交不亲和性在菊科六倍体花园菊花中进行了研究。从高度亲和的杂交中选择的 9 个同胞克隆均为自交不亲和。在这些同胞的部分双列杂交中，有 14.8%是亲和的，但有一个同胞，67-111-42，占 12 个亲和杂交中的 10 个。67-111-42 与其他近亲植物的杂交也比其余 8 个同胞更亲和。9 个同胞与 12 个不相关的测试者克隆的杂交表明，它们都没有雄性或雌性不育。通过假亲和性的自交成功地增加了 S 基因座的纯合度。从 67-111-42I1 植物杂交的 I2 克隆的 3 个同胞双列杂交中获得的亲和杂交百分比接近原始的 9×9 双列杂交，但没有一个个体占大多数亲和杂交。从本研究的授粉中，可以将 9 个同胞分为 9 种不亲和模式。有证据表明，花园菊花的自交不亲和反应是孢子体的，并涉及不止一个基因座。
