籼型水稻优质不育系898A的选育

Breeding of 898A,A New Indica Rice CMS Line of Good Quality

898A是湖南金健种业有限责任公司与常德市农业科学研究所于1997-2004年以中9B×德山B的F7代制保材料与金23A多代回交转育而成的野败型早熟籼稻不育系.它米质优良,主要米质指标达部颁二级以上优质米标准;农艺性状好,株叶型好,穗粒结构合理;不育性稳定,2004年在海南经专家鉴定,不育株率100%,不育度99.99%,自交结实率0.1%,育性达到湖南省水稻三系不育系鉴定标准,开花习性好,花时早,柱头外露率高,异交结实率好,繁殖制种产量高;配合力好,所配组合优势强,于2005年2月通过湖南省农作物品种审定.

898A, which was developed by Hunan Jinjian Seed Ltd. and Changde Agricultural Science Research Institute from 1997 to 2004, derived from crossing the selected F7 plants of Zhong 9B/Deshan B to Jin 23A with successive backcrossing method, is an early-maturing WA type indica CMS line.It shows not only desirable agronomic characters, good plant type, suitable composition of panicles, complete and stable male sterility, but also better grain quality, whose main quality characters were up to the second class standards of fine quality rice of the Chinese Ministry of Agriculture. Surveyed by experts in Hainan in 2004, it is characterized that the rate of sterile plants was 100%, the percentage of sterile pollens was 99.99%, and the self seed setting percentage was 0.1%, all of these sterile indexes almost reached the standards of Hunan for CMS line. It is also characteristic of good flowering habits, early flowering time, high stigma exsertion rate, high outcrossing seed setting rate, high hybrid seed production yield, good combining ability, strong yield heterosis of its hybrid combination. 898A was certified and released by the Hunan Provinical Crop Variety Release Committee in February 2005.