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为了评价小麦温光敏核不育系的配合力,采用14×6不完全双列杂交对14个温光敏核不育系和6个恢复系的7个性状进行了配合力分析。结果表明,穗粒数、千粒重、穗长和小穗数的一般配合力(GCA)方差达极显著水平,这些性状以加性效应为主;单株产量、单株穗数和株高的GCA和特殊配合力(SCA)方差均达极显著水平,3个性状同时受加性和非加性效应的共同作用。GCA好的亲本一般都有较大的产量及产量构成因子GCA效应值以及较多的正效GCA产量构成因子,不育系S1、S6、S7、S9、S12、S13、m14均具有较好的GCA。10个单株产量最大组合的产量构成因素SCA效应值分析结果表明,强优势组合产量三要素的重要性依次为穗粒数、有效穗数和千粒重,不育系的小穗数和株高,恢复系的单株穗数、穗粒数、千粒重及株高的田间表型值与其GCA效应值呈极显著正相关,这些性状的表型值可直接用于指导亲本选配。
In order to assess the combining ability of wheat thermo-sensitive genic male sterile lines, we analyzed the combining ability of 14 traits of 14 thermo-photo-sensitive genic male sterile lines and 6 restorer lines using 14 × 6 incomplete diallel cross. The results showed that the GCA variance of grains per spike, 1000-grain weight, spike length and spikelet number reached the extremely significant level, and these traits were mainly additive effects. The GCA of single plant yield, panicles per panicle and plant height And special combining ability (SCA) reached the extremely significant level. The three traits were affected by both additive and non-additive effects. GCA good parents generally had larger GCA effect and higher positive GCA yield components, and the male sterile lines S1, S6, S7, S9, S12, S13 and m14 all had better GCA. The results of SCA analysis showed that the importance of the three elements of the yield was the order of the number of spikes per panicle, the effective panicle number and 1000-grain weight, the spikelet number and plant height of the sterile lines, The phenotypic values of the panicles per plant, the grains per panicle, the 1000-kernel weight and the plant height of the restorer lines were significantly and positively correlated with their GCA effect values. The phenotypic values of these traits could be directly used to guide the parental matching.