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试用灰色系统理论关联度法对81008×(托尔+H_4)油菜杂交组合F_2表现优良的7个株系,选用株系单株产量等7个主要农艺性状的平均值为单位作计算,分析了单株产量与其它农艺性状的关联程度。结果表明,单株有效分枝对产量的作用最大(r_3=0.9766),其后依次是,株高(r_1=0.7733),每角粒数(r_5=0.6689),单株有效角果数(r_4=0.4930),千粒重(r_6=0.3965),主花序长(r_2=0.3504)。因而,有效分枝应作为该杂交组合F_3、F_4代株系决选的主要农艺性状。千粒重,主花序有效段长在株系决选中不属于主要考虑因素,ri的离散性,证明了灰色系统理论将信息由灰变白的作用。
In this study, seven lines with excellent performance of 81008 × (Tol + H_4) rape F1 hybrids were tested by the method of gray system theory. The average value of seven major agronomic traits such as single plant yield was calculated and analyzed Correlation between yield per plant and other agronomic traits. The results showed that the effective branch of single plant had the greatest effect on the yield (r_3 = 0.9766), followed by the plant height (r_1 = 0.7733), the number of anther per plant (r_5 = 0.6689) = 0.4930), 1000-grain weight (r_6 = 0.3965), main inflorescence length (r_2 = 0.3504). Therefore, the effective branching should be the main agronomic trait selected by F_3 and F_4 lines of this cross combination. 1000-grain weight, the effective length of the main inflorescences in the line is not the main factor in the decision, discreteness of ri, proved the theory of gray system information from white to gray role.