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两优703是安徽省农业科学院水稻研究所用自育两系不育系株选63-8S与优质两系恢复系中籼703配组育成的两系杂交中籼新组合,2012年12月通过安徽省品种审定。该组合2 a区试平均产量9.208 t/hm2,较对照Ⅱ优838增产6.63%;株型松紧适中,茎秆较粗壮;中抗稻瘟病、白叶枯病和稻曲病;米质较好,综合指标达3级食用稻品种标准;全生育期135 d左右,适宜在安徽省作一季中稻种植。
Liangyou 703 is a new two-line indica hybrid rice combination of 63-8S self-bred two-line CMS lines and two high-quality two-line restorer lines of medium indica 703 in paddy institute of Anhui Academy of Agricultural Sciences. In December 2012, Provincial varieties validation. The average yield of 2 a-zone test in this combination was 9.208 t / hm2, which was 6.63% higher than that of the control Ⅱyou838. The plant type was moderate and the stalk was strong. The resistance to rice blast, bacterial leaf blight and rice false smut was better , The comprehensive index up to level 3 edible rice varieties standards; the whole growth period of about 135 d, suitable for planting a quarter of rice in Anhui Province.