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采用 NC-II遗传交配设计 ,对黄早 4及其 9个改良系的单株粒重等 1 2个性状的配合力进行了研究。结果表明 ,所测性状配合力在被测系间存在极显著差异。其中 ,H2 1的单株粒重 GCA显著高于黄早 4,SCA方差与黄早 4大体相同 ,多数性状 GCA对 F1 有利 ,是较理想的黄早 4改良系。昌 7-2、5 2 3 7、文黄3 1 41 3、齐 3 1 0单株粒重 GCA较黄早 4高但达不到显著水平。它们的 SCA方差高于黄早 4或与黄早 4大体相当 ,这几个自交系可以在育种中直接利用。 K1 2、5 0 2、武 3 1 4组配的个别组合 SCA较高而其 GCA低于黄早 4,只能利用其 SCA或做为基础材料利用其个别优良性状。 5 2 1 0 6与黄早 4类自交系间配合力较高 ,有可能选出优势组合应用于生产
Using NC-II genetic mating design, the combining ability of 12 traits such as grain weight of Huangzao 4 and its 9 improved lines was studied. The results showed that there was a significant difference in the combining ability between the tested lines. Among them, the GCA of H2 1 per plant was significantly higher than that of Huangzao 4, and the variance of SCA was the same as that of Huangzao 4. GCA of most traits was favorable to F1, which was an ideal mutant of Huangzao 4. Chang 7-2,5 2 3 7, Wen Huang 3 1 41 3, Qi 3 1 0 GCA weight per plant than Huangzao 4 but not reach a significant level. Their SCA variance is higher than that of Huangzao 4 or Huangzao 4, and these inbred lines can be used directly in breeding. K1 2,5 0 2, Wu 3 1 4 group with a combination of individual high SCA and its GCA lower than yellow 4, can only use its SCA or as a base material to take advantage of its individual good traits. 5 2 1 0 6 and yellow early 4 inbred lines with higher binding power, it is possible to select the dominant combination used in the production