籼型不育系水稻群A选育与应用

Breeding and Application of Indica Sterile Line Rice Group A

籼型三系不育系群A是岑溪市振田水稻研究所用自选保持系材料“YF04B”作父本、自选中间品系“NZZB”作母本进行杂交,经过多次自交、回交后于2009年育成。本文就选育目标及过程、特征特性、配合力表现、繁殖技术等进行了概述,2011年10月,群A通过广东省籼型水稻不育系生产应用标准的技术鉴定。2012年2月群A申请植物新品种保护,2016年1月获得授权。群A表现株型集散适中,不育性稳定,配合力强,柱头外露率高,异交结实率高,对“九二○”敏感,易于繁殖制种。利用该不育系至今已经组配出7个高产、品优质、抗性强的杂交组合通过品种审定并应用于生产。

Indica three-line sterile line group A was bred of Zhentian Rice Research Institute in Cenxi City in 2009 by crossing with self-selected maintainer line“YF04B”as male parent and self-selected intermediate line“NZZB”as female parent.In this paper,the breeding objectives and process,characteristics,combining ability and reproductive technology were summarized.In October 2011,group A passed the technical identification of the production and application standards of indica rice sterile lines in Guangdong Province.In February 2012,group A applied for the protection of new plant varieties and was authorized in January 2016.Group A showed moderate plant type distribution,stable sterility,strong combining ability,high stigma exsertion rate,high outcrossing rate,sensitive to“920”,and easy to reproduce and produce seeds.Up to now,seven hybrid combinations with high yield,good quality and strong resistance have been developed by using this sterile line,which have been approved and applied to production.