爪哇稻与其杂交种的性状相关性和超亲优势研究

Study on the Correlation of Agronomic Traits and Heterobeltiosis of Javanica Rice and Its Hybrid

爪哇稻在长沙表现为大穗、大粒、分蘖少、生育期长和植株高。培矮 6 4S/爪哇稻组合在秆高、穗长、单株有效穗、每穗总粒数、每穗实粒数、单株产量、理论产量和实际产量方面存在正向超亲优势 ,在播始历期、结实率和千粒重方面存在负向超亲优势。杂种秆高与父本穗长、杂种穗长和父本穗长、杂种每穗总粒数与父本每穗总粒数和穗长、杂种每穗实粒数与父本每穗总粒数、杂种千粒重与父本每穗总粒数之间分别存在显著的线性回归关系。

The javanica rice shows its traits of long panicle, big grain, less panicle per plant, long growth duration and high plant height. The hybrid, Pei'ai 64S/javanica rice, possesses positive heterobeltiosis in culm height, panicle length, effective panicles per plant, spikelets per plant, yield per plant, theoretic yield per hectare and actual yield per hectare; performs negative heterobeltiosis in days to flower, seed set and 1000-grain weight. There are significant linear regression relations between culm height of hybrid and panicle length of male parent, panicle length of hybrid and that of male parent, spikelets per panicle of hybrid and spikelets per panicle and panicle length of male parent, grains per panicle of hybrid and spikelets per panicle of male parent, 1000-grain weight of hybrid and spikelets per panicle of male parent respectively.