Because of the yield increase of 3.5–15% compared to conventional wheat, hybrid wheat is considered to be one of the main ways to greatly improve the wheat yield in the future. In this study, we performed a principal component analysis(PCA) on two-line hybrids wheat and their parents using the grain weight(GW), the length of spike(LS), the kernel number of spike(KSN), and spike number(SPN) as variables. The results showed that the variables could be classified into three main factors, the weight...

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