[Objective]The aim was to study the sensitive response characteristics of the main agronomic traits of somaclonal and the variation of sensitive response of the lines of somaclonal to sowing date. [Method]The RITSD ch...[Objective]The aim was to study the sensitive response characteristics of the main agronomic traits of somaclonal and the variation of sensitive response of the lines of somaclonal to sowing date. [Method]The RITSD changing of agronomic traits was studied by using 24 rice somaclonal and its donor parent under two sowing dates. [Result]The average values of RITSD were higher （over one） for the traits of pant height （PH）,density of spikelets （DS）,filled spikelets per panicle （FSP）,spikelets per panicle （SP） and grain weight per plant （GWP）,but lower for days of sowing to heading （DSH）,effective panicles （EP）,panicle length （PL）,seed setting rate （SS） and 1 000-grain weight （1 000-GW）. These showed that PH,DS,FSP,SP and GWP were easily affected by sowing date and tended to higher with the later sowing; the RITSD of somaclonal changed with the agronomic traits. The frequency of RITSD＇ variation of DSH and PH was higher than that of PL. The RITSD＇ value of EP,PL,DS,FSP,SP and SS became higher,and higher or lower for DSH and GWP in different somaclonal; compared with the donor,20 of 24 was significantly different,and the frequency of RITSD variation was over 83. 3%,however,RITSD of the most lines （75%） changed only for 1-2 characters; cluster analysis showed that the RITSD of agronomic traits belonged to different combinations of somaclonal in rice. [Conclusion]the study had provided a theoretical basis for the screening and using of the somaclonal.展开更多
本文比较了GYBT突变体1103S与GYBT回复突变体96024的性状差异。结果表明:在自然变温及人工控温诱导下,1103S要表达间段失绿性状(Green-yellow band trait,GYBT),而96024不表达。两者的育性转换特性、多数农艺及谷粒性状无明显差异,但叶...本文比较了GYBT突变体1103S与GYBT回复突变体96024的性状差异。结果表明:在自然变温及人工控温诱导下,1103S要表达间段失绿性状(Green-yellow band trait,GYBT),而96024不表达。两者的育性转换特性、多数农艺及谷粒性状无明显差异,但叶片性状存在显著差异。两者的正常绿叶的叶绿素含量及a/b值、叶片游离氨基酸组分及含量也无明显差异。当GYBT表达时,1103S叶绿素含量比96024低77.49%,叶绿素a/b值比96024高58.99%。1103S和96024是研究GYBT较为理想的近等基因系。展开更多
基金Supported by Chongqing Major Research Project "Innovation in Hybrid Rice Breeding and New Materials" ( CSTC, 2007, AA1019 )Sichuan Province Breeding Research Project (06yzgg-01)~~
文摘[Objective]The aim was to study the sensitive response characteristics of the main agronomic traits of somaclonal and the variation of sensitive response of the lines of somaclonal to sowing date. [Method]The RITSD changing of agronomic traits was studied by using 24 rice somaclonal and its donor parent under two sowing dates. [Result]The average values of RITSD were higher （over one） for the traits of pant height （PH）,density of spikelets （DS）,filled spikelets per panicle （FSP）,spikelets per panicle （SP） and grain weight per plant （GWP）,but lower for days of sowing to heading （DSH）,effective panicles （EP）,panicle length （PL）,seed setting rate （SS） and 1 000-grain weight （1 000-GW）. These showed that PH,DS,FSP,SP and GWP were easily affected by sowing date and tended to higher with the later sowing; the RITSD of somaclonal changed with the agronomic traits. The frequency of RITSD＇ variation of DSH and PH was higher than that of PL. The RITSD＇ value of EP,PL,DS,FSP,SP and SS became higher,and higher or lower for DSH and GWP in different somaclonal; compared with the donor,20 of 24 was significantly different,and the frequency of RITSD variation was over 83. 3%,however,RITSD of the most lines （75%） changed only for 1-2 characters; cluster analysis showed that the RITSD of agronomic traits belonged to different combinations of somaclonal in rice. [Conclusion]the study had provided a theoretical basis for the screening and using of the somaclonal.
文摘本文比较了GYBT突变体1103S与GYBT回复突变体96024的性状差异。结果表明:在自然变温及人工控温诱导下,1103S要表达间段失绿性状(Green-yellow band trait,GYBT),而96024不表达。两者的育性转换特性、多数农艺及谷粒性状无明显差异,但叶片性状存在显著差异。两者的正常绿叶的叶绿素含量及a/b值、叶片游离氨基酸组分及含量也无明显差异。当GYBT表达时,1103S叶绿素含量比96024低77.49%,叶绿素a/b值比96024高58.99%。1103S和96024是研究GYBT较为理想的近等基因系。
