两系中籼杂交稻组合两优6785的选育

Breeding of Two-line Indica Hybrid Rice Combination Liangyou 6785

两优6785是由用两系不育系885S为母本、黔恢785为父本配组的高产稳产、抗性较强、米质较优的两系中籼杂交稻新组合。经2010-2011年贵州省杂交水稻迟熟组2a区域试验平均单产9.25 t/hm2,比对照Ⅱ优838增产9.06%;2013年生产试验平均单产9.59 t/hm2,比对照增产10.30%;全生育期158.9 d,比Ⅱ优838早熟0.9 d;稻瘟病抗性、稻米理化指标和食味鉴评结果均优于对照。2014年6月通过贵州省农作物品种审定委员会审定(黔审稻2014004号)。

Liangyou 6785 was bred from the group with sterile line 885 S as female and Qianhui 785 as male,and it is a new combination of two-line hybrid indica rice with high and stable yield,strong resistance,as well as superior grain quality. As tested by Guizhou Province late maturing group,the average yield of Liangyou 6785 was 9. 25 t / hm2 during 2010 to 2011,increased by 9. 06% in comparison with the control（ You838）. The mean yield was 9. 59 t / hm2,and 10. 30% higher than that of the control in 2013. The growth period of Liangyou 6785 was 158. 9 d,and shorter than that of the control. The resistance to rice blast,physical and chemical characters of rice and taste identification results were better than that of the control. Liangyou6785 was authorized by Guizhou Crop Variety Approval Committee in June,20l4（ No. Qianshendao2014004）