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High-Yielding Culture of New Two-Line Hybrid Rice Combination Shenliangyou 1813 and Correlation Analysis of Yield Components

LI Jian-wu;SONG Chun-fang;LI Chu-jia;SONG Shun-he;JIANG Wen-liang;DENG Qi-yun;College of Agronomy,Hunan Agricultural University;China National Hybrid Rice R&D Center / State Key Laboratory of Hybrid Rice;The Rural Work Office of Xupu County.;Agricultural Technology Extension Station Shui of dong Township;  
Shen liangyou 1813 is a new two line hybrid rice combination bred by China National Hybrid Rice RD Center and Longping High-Tech and in 2013 it yielded,at 13.63 t/hm2 in Xupu County,Hunan Province.In this study,its high-yielding cultural techniques are introduced and the relationship between the yield and its components is analyzed by correlation analysis.The results show that ①among three factors of the yield,the number of effective panicles is positively correlated with the yield(r=0.561*),so are the number of filled grains per panicle(r=0.406)and the 1000-grain weight(r=0.037),the number of effective nanicles and the number of filled grains per panicle are the basic guarantee for high and stable yield,so increasing the effective panicles and filled grains per panicle is the key to obtain high yield;②the number of effective panicles is negatively correlated with the number of filled grains(r=-0.525*),there is the sharp contradiction between them,and the relationship between them should be balanced when this variety;and ③ the 1000-grain weight is weakly positively correlated with the number of effective panicles and the number of filled grains per panicle,it also has little effect on the yield(r=0.037),and the 1000-grain weight is the inherent characteristic.
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