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通过对 1 2种行比与播幅的研究发现 ,在一定的播幅范围内 ,西杂一号母本异交结实率和行比关系不大 ,而与播幅关系密切 ,有随母本播幅增加而降低的趋势 ;西杂一号制种田的母本播幅不超过 1 .8m时 ,两行父本提供的花粉量就可以满足需求 ,在此范围内 ,父本播幅的增加对提高异交结实率作用不十分显著。通过回归分析求得“西杂一号”制种产量大于 5 2 5 0 kg/ hm2 的父母本比例范围为 0 .1～ 0 .5 ;并得出在关中灌区 ,西杂一号制种田以选择 2行父本、6～ 9行母本的行比播幅组合为佳
Through the study of 12 kinds of sowing ratio and sowing rate, within a certain sowing range, there is no significant correlation between the sowing rate and the sowing rate of Xiya No.1 female parent, Sowing rate increases and decreases. When the sowing amount of Xishuo-No-1 farming does not exceed 1.8 m, the pollen amount provided by two lines of male parent can meet the demand. Within this range, the increase of sowing rate of male parent The effect of improving the rate of outcrossing is not very significant. Through regression analysis, the proportion of parents who produced more than 5250 kg / hm2 of “Xizha No.1” seed was found to range from 0.1 to 0.5. The results showed that in Xizhong Irrigation District, Choose 2 lines of paternal, 6 to 9 lines of the mother than the sowing combination is better