Laboratory of Plant Breeding, Faculty of Horticulture, Chiba University, Matsudo 648, Matsudo, 271, Chiba, Japan.
Theor Appl Genet. 1992 Sep;84(7-8):812-8. doi: 10.1007/BF00227389.
One or two marker genes on each of chromosomes 3, 4, 6, 7, 8, 11 and 12 of the 12 rice chromosomes were tested for segregation distortion in indica-japonica hybrids. Marker genes on chromosomes 3, 7, 8, 11 and 12 showed clear segregation distortion. This distortion was not related to the proportion of normal pollen. The germinability of the pollen was less than 10% in the hybrids, although 45-55% of the pollen grains appeared to be morphologically normal. The frequent occurrence of segregation distortion and the low germinability of the pollen grains suggested that a large portion of the pollen produced by the Indica-Japonica hybrids was not functional. The fact that the segregation distortion of the same marker may be positive or negative depending on the cross combination suggested the existence of multiple alleles, including distortion-neutral alleles. The latter mitigate pollen sterility in certain hybrid combinations.
在籼粳杂交种的 12 条水稻染色体的 3、4、6、7、8、11 和 12 号染色体上的每个染色体上检测到一个或两个标记基因的分离失真。染色体 3、7、8、11 和 12 上的标记基因显示出明显的分离失真。这种失真与正常花粉的比例无关。在杂种中，花粉的发芽率低于 10%，尽管 45-55%的花粉粒在形态上似乎正常。分离失真的频繁发生和花粉粒的低发芽率表明，籼粳杂种产生的花粉大部分是没有功能的。同一标记的分离失真可能因杂交组合而异，呈正或负，这表明存在多个等位基因，包括失真中性等位基因。后者减轻了某些杂交组合中花粉不育的程度。
