四川核桃优良单株选择的研究

A Study of Individual Selection of Improved Varieties of Walnut in Sichuan Province

1 966年以后 ,在我省重点核桃产区开展优良种质资源选择工作。按坚果品质和丰产性状等选育指标 ,进行优树初选、复选和决选。经多性状综合评定 ,筛选出 1 2株优良单株。所选择的优良单株平均树龄 2 7年 ,株产坚果 2 1 .6kg,树冠投影面积产仁量 0 .2 65kg/ m2 ,平均单果重 1 2 .4 5g,壳厚度 1 .0 7mm,出仁率 60 .2 5%。用这批优良单株作为无性繁殖材料 ,是改良我省核桃遗传品质、提高核桃生产效益的重要途径之一。

After the year 1996,primary selection,multiple selection and decisive selection of fine trees of walnut in Sichuan were conducted according to the selection and breeding indexes.Twelve individuals of improved varieties were selected on the basis of comprehensive evaluation of the multiple properties of walnut.As materials of clonal propagation,these individuals will improve the genetic character of walnut in Sichuan and raise its yield.