超高产水稻品种理想型性状和优化配组新技术的研究

ON THE OPTIMAL CHARACTERS OF SUPER-HIGH-YIELD RICE AND THE NEW TECHNI-QUE OF RATIONALIZE MATING

１９８９～１９９３年，对６３个水稻高产品种的１９３个性状的育种值进行了逐步回归分析和通径分析，得到了早籼、早粳、晚籼、晚粳高产品种所必须具备的理想型性状及其优化回归方程，并在此基础上对供试品种进行了分类，配制了各类型间杂交种，研究了各重要理想型性状的配合力，找出了最优的配组方案。

From 1989 to 1993,we analys the rice breeding values of 193 characters of 63high-yield varieties by means of regression and path analysis.The optimal characters of high-yield varieties,such as early indica,early japonica,late indica and late japonica, and it’s opti-mal regression equation were received.Basing on this,we classified the experimental vari-eties,breeding the hybrids between the types,studied the combining ability of all importantoptimal characters and got a rationalize mating scheme.