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对桃的９个杂交组合４６３株杂种实生苗需冷量进行测定,统计结果表明：桃需冷量是由多基因控制的,Ｆ＿１需冷量平均值较亲中值短,不同组合偏离程度不同,南山甜桃、红日、玛丽维拉、白凤、大久保需冷量育种值分别为１５９、２１６、３１９、８３１、８３４ｈ,遗传传递力分别为７９%、５４%、９２%、８３%、９３%。需冷量的遗传力为８９．６９%。萌芽开花与需冷量密切相关。
The cold tolerance of 463 hybrid seedlings of 9 hybrids of peach was tested. The results showed that the peach cold tolerance was controlled by polygenes, the average cold tolerance of F_1 was shorter than that of the cousin, and the deviations of different combinations were different , Nanshan sweet peach, red sun, malaweila, Bai Feng and Okubo were 159,216,319,831 and 834h, respectively, and the genetic transmission power was 79%, 54%, 92% and 83%, respectively. 93%. The heritability of cold required was 89.69%. Budding is closely related to the amount of cold required.