水稻雪禾矮早矮秆基因定位研究初报

The Location of the Dwarf Gene in Rice Variety Xueheaizao

研究了云南稻种矮源雪禾矮早的矮秆基因sd-s(t)与10个已知矮秆基因以及与2个标记基因gh-1和st-2间的关系。结果表明,sd-s(t)与d-2、d-3、d-6、d-7、d-10、d-11、d-12、d-13、d-14、d-17、d-18~h、d-19、d-27、d-30、d-35、d-42、d-47、d-51、d-52等19个矮秆基因为非等位关系,而与d-1可能为复等位关系。建议将sd-s(t)命名为d-1~x。该复等位基因系列的显隐关系为+>d-1~x>d-1。在第Ⅵ+Ⅸ连锁群上的d-1~x与gh-1的交换值为33%±5.6%,与st-2的交换值为23%±6.1%,gh-1与st-2的交换值为48%±4.7%,即d-1~x位于gh-1和si-2两个标记基因之间。

The research deals with the relation of the dwarf gene sd-s(t) presenting in Yunnan rice variety Xueheaizao, with 20 known dwarf genes and 2 marker genes gh-1 and st-2 in linkage group. Ⅳ+Ⅸ. The results indicated that sd-s(t) was nonallellc to the following dwarf genes: d-2、d-3、d-6、d-7、d-10、d-11、d-12、d-13、d-14、d-17、d-18~h、d-19、d-27、d-30、d-35、d-42、d-47、d-51、d-52、but possibly a multiple allele to d-1. It suggests that the gene symbol sd-s (t) be renamed as d-1~x. The dominance order of these multiple alleles is+>d-1~x>d-1. The recombination value between d-1~x and gh-1 is 33%+5.6%, that between d-1~x and st-2 is 23%±6.1%, while a 48%+4.7% recombination occurs between gh-1 and st-2, indicating that d-1~x locus is between gh-1 and st-2 loci in linkage group Ⅵ+Ⅸ.