水稻半矮秆基因sdl对农艺性状的影响  

Effects of Semidwarf Gene sdl on Agronomic Traits in Rice (Oryza sativa subsp.indica)

作　　者：石春海[1] 申宗坦[1] 

机构地区：[1]浙江农业大学农学系

出　　处：《中国水稻科学》1996年第1期13-18,共6页Chinese Journal of Rice Science

基　　金：国家和浙江省"八五"攻关资助

摘　　要：比较了从７份半矮秆品种８／高秆品种的Ｂ７Ｆ２中分离的高矮秆近等基因系，ｓｄｌ基因抑制了节间伸长，从基部到倒第１节及穗长分别为高秆的３８．２％、２６．０％、４０．８％、７１．１％和９２．６％，缩短程度逐步减轻。ｓｄｌ基因还可促进有效穗数、结实率和收获指数的提高而使矮秆类型的产量潜力高于高秆类型，但ｓｄｌ工基因并不影响抽穗天数、每穗粒数和干粒重。对ｓｄｌ基因的多效性以及秆高和穗数的关系进行了讨论。Seven tall and dwarf near isogenic lines was bred by semidwarf8/tall varieties (B7F2 and the effects of semidwarf gene sdl on agronomic traits in indica rice was studied. The results indicated that the length of internodes were inhibited by the sdl gene, and the length of internodes from the basal internode to the uppermost internode and panicle of dwarf near isogenic lines were 38. 2%, 26. 0%, 48. 0%, 71. 1% and 92. 6 % of tall ones, respectively.The effective panicles per plant, spikelet fertility and harvest index were increased by sdl gene, and the yield of dwarf near isogenic lines was higher than tall ones. But it was no effects of sdl gene on the traits of days to heading,No. of spikelets per panicle and 1000 grains weight. The pleiotropism of sdl gene and the relationship of plantheight and effective panicles were discussed.

关 键 词：半矮秆基因 多效性 水稻 农艺性状 

分 类 号：S511.103.2[农业科学—作物学]