玉米改良Reid群自交早代的配合力分析

Analysis of Combining Ability in the Early Selfing Generation of Maize Improved Reid Heterotic Groups

以改良Reid群内 8个自交系 (8112、4 78、5 0 0 3、掖 10 7、792 2、4 112、970 39、B73)组配杂交种的自交后代 (单S1、双S0 )为试验材料从中选择自交系 ,以pho2、pho3为测验种进行配合力测定 ,结果表明 :玉米自交早代各性状的狭义遗传力都较低 ,其中狭义遗传力相对较高的性状有穗长、穗粗、株高、穗位高 ;根据测配结果 ,选出综合性状优良的自交早代有 7- 1>A2 1>3- 2 >1- 2。

The selfing first generation (S_1) of single crosses and the double crosses from representative eight inbreeding lines: (8112、478、5003、Ye107、7922、4112、97039、B73)of Maize Improved Reid population were used in selecting early selfing generation and the combining ability of early selfing generation was determined by pho2、pho3 population.The result was showed that: special genetic ability of early selfing lines was low on all traits, and special genetic ability of ear length, ear diameter, stalk height, ear height was higher; According to the general combining ability 7-1>A(21)>3-2>1-2 were selected.