籼型杂交水稻不育系恩2A的选育与利用

Breeding and Utilization of Indica CMS Line En 2A in Rice

恩2A是湖北省恩施土家族苗族自治州农业科学院用中9B与福伊B的杂交F5代优良单株与华37A测交,并经过连续多代回交转育而育成的籼型三系不育系,具有不育性稳定、稻瘟病抗性较强、开花习性好、柱头外露率高、配合力强等特点,2015年10月通过湖北省品种审定。

En 2A,derived from testcrossing Hua 37A to the desirable plants from the F＋5 progeny of Zhong 9B/Fuyi B,is a new indica rice CMS line developed through successive backcrossing over years by Enshi Academy of Agricultural Sciences of Hubei Province.It is characteristic of stable and complete male sterility,relatively strong blast resistance,good flowering habits,high stigma exsertion rate and high combining ability.It was approved for release by Hubei Provincial Crop Variety Appraisal Committee in October,2015.