几个玉米改良系主要农艺性状配合力和遗传参数的分析

Analysis of Combining Ability and Genetic Parameters of Main Agronomic Characters in Maize Improved Inbred Lines

采用NCⅡ设计 ,对几个玉米改良系主要农艺性状进行了配合力和遗传参数分析。结果表明 :388_2的产量性状的一般配合力最高 ,为较好的改良系 ;792 2× 388_2、吉 85 3× 388_2、Mo17× 389_1、Mo17× 387_1的配合力总效应较高。遗传参数分析表明 :穗长、行数、秃尖长主要受加性基因控制 ;百粒重、单株产量、穗重主要受非加性基因控制。

In this study ,the crossing pattern system followed a North caralina design Ⅱ (NCⅡ) The objectives of the study were to determine the combining ability and heterosis among five inbred lines with four elite inbred lines,and identify counterpart heterotic lines for the recurrent selection programs The analysis showed that 388_2 expressed the highly positive general combining ability and 7922×388_2,吉853×388_2,Mo17×389_1,Mo17×387_1 were the best combinations for yield traits It appeared that narrow genetic ability of ear length ,row number and barren ear tip was high,while that of 100_grain weight ,grain yield per plant and ear weight was low