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1983—1985年间对3份高粱 A_2不育系,及其与20份测验种组配的测交种,进行了主要农艺性状的配合力分析。结果表明,A_2TAM428和 A_2T_x3197穗粒重、穗粒数、穗长的 GCA 效应显著低于 A_1T_x622的;A_2T_x624各主要农艺性状的 GCA 效应通常与 A_1T_x622的相近。A_2TAM 428×晋粮5,A_2T_x3197×忻粮7穗粒重的 SCA 效应较高,但实际值低,故其亲本不育系不宜在生产中使用。A_2T_x3197穗长的 GCA 效应稳定地不同于 A_1T_x3197的,其它不育系及性状的 GCA 或 SCA 效应也有类似表现,但不稳定。这表明 A_2细胞质能引起个别基因型和性状的配合力发生变化,其程度还受核基因和环境影响。
During 1983-1985, three sorghum A_2 male sterile lines and their test hybrids with 20 test cultivars were selected to test the combining ability of the main agronomic traits. The results showed that the GCA effect of A_2TAM428 and A_2T_x3197 was significantly lower than that of A_1T_x622, while the GCA effect of A_2T_x624 was similar to that of A_1T_x622. The SCA effect of A_2TAM 428 × Jinliang 5 and A_2T_x3197 × Xinyu 7 was higher than that of the control, but the actual value was low. Therefore, it is not suitable for its parental CMS to be used in production. The GCA effect of spike length of A_2T_x3197 was stably different from that of A_1T_x3197. The GCA or SCA effects of other CMS lines and traits also showed similar but unstable effects. This suggests that A 2 cytoplasm can cause changes in the combining ability of individual genotypes and traits, the extent of which is also affected by nuclear genes and the environment.