【摘要】 云软209S是用蜀光612S作母本与优质软米品种云恢290杂交,经7a9代选育出的籼型光温敏核不育系。该不育系在云南水富连续不育期长50d左右,不育起点温度低于23℃,不育期间群体不育性稳定,花粉败育彻底,可育期间可繁性好,海南冬繁自交结实率49.3%。柱头外露率高达85.8%,开花习性好,张颖角度大,综合农艺性状优良。稻米品质优,直链淀粉含量较低,是用云南籼型软米改良育成的第1个软米光温敏核不育系,2007年8月通过云南省科技厅技术鉴定。更多还原

【Abstract】 Yunruan 209S is an indica type photo-thermo-sensitive genic male sterile (PTGMS) line which was developed by crossing Shuguang 612S, an elite TGMS line, with Yunhui 290, a soft grain variety with good grain quality. It is the first PTGMS line of soft rice with a relatively low amylose content developed from Yunnan indica soft rice. Its stable consecutive male sterile period was about 50 days at Shuifu, Yunnan with a critical temperature lower than 23℃. Its male sterility in the sterile period was complete and very stable, while it was easy to multiply itself in its fertile period. The seed setting rate was 49.3% when it was multiplied in Hainan in Winter. It has also good grain quality and a high stigma exsertion rate (85.8%) and other good flowering habits. It was technically identified in Yunnan Province in 2007.更多还原