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为了解枣树抗寒性的遗传变异规律,寻找优良的抗寒资源,为枣树生产服务,采用电导法,在不同时期对冬枣×临猗梨枣杂交后代及其父母本枝条进行抗寒性研究,结果显示:深冬(12月底)枣树枝条的抗寒性强于萌芽前期(3月中旬),同一时期杂交后代枝条的抗寒性强于母本冬枣、父本临猗梨枣。抗寒性在杂交群体中存在很大变异,在不同时期、不同处理温度下各级次的个体数均呈正态分布,表明杂交后代的抗寒性为受多基因控制的数量性状。初步筛选出10株抗寒有益单株,以供进一步选育。
In order to understand the law of genetic variation of cold hardiness in jujube tree, find good cold hardiness resources and serve for jujube tree production, using the conductivity method, the cold resistance of jujube × Linli pear jujube hybrid progenies and their parental branches in different periods The results showed that the cold resistance of jujube branches was stronger than that of early jujube (middle March) in the deep winter (the end of December), and the cold resistance of the progeny of hybrid progenies in the same period was stronger than that of female jujube and paternal jujube. Cold hardiness in the hybrid population there is a big variation in different periods, different treatment temperatures at all levels of the number of individuals were normal distribution, indicating that the cross-offspring of the cold tolerance of the number of genes controlled by the number of traits. Ten cold hardy plants were screened for further breeding.