桃种质资源托叶长度评价与分级体系的建立

Evaluation and Grading of Stipule Length in Peach Germplasm Resources

为了完善桃种质资源托叶长度评价方法,对不同果枝长度、不同树龄和不同年份托叶长度进行了稳定性分析,建立了稳定可靠的桃树托叶长度评价方法：树龄3~10年,树冠外围1.0~1.5 m高度、长果枝中部新梢完全展开叶片的托叶,测量托叶基部至托叶尖端的长度。依据此方法测量了718份桃种质资源托叶长度;并结合桃种质资源＂种＂和＂品种类群＂2个分类依据,利用SPSS统计分析软件对托叶长度进行分类分析和比较。提出桃托叶长度分级指标：〈0.55 cm为1级,0.55~0.90 cm为2级,0.91~1.30 cm为3级,1.31~1.65 cm为4级,〉1.65 cm为5级,参照品种分别为：光核桃2号、红花碧桃、新白凤、早乙女、TX4C199。

The evaluation was made based on different branch length,tree age and different years in order to improve and perfect the method of the stipule length in peach. A stable method of evaluating the stipule length in peach is established. out side the crown,1- 1. 5 m height from the ground,15- 25 cm length of young shoot in the middle part of long fruit shoot was choosed in 3- 10 years old trees to measure the stipule length of the grown leaves. We observed and measured the stipule length in 718 Peach Germplasm Resources by this method. We studied the stipule length of peach according to the classification of species and taxons of peaches by SPSS. The stipule length of Peach Germplasm Resources are graded： 0. 55 cm is extremely short,0. 55- 0. 9 cm is short,0. 91-1. 30 cm is intermediate,1. 30- 1. 65 cm is long, 〉1. 65 cm is extremely long. The reference cultivars of stipule length of peaches are ‘Guanghetao2＇,＇Honghuabitao＇,＇New hakuho＇,＇saotome＇and ＇TX4C199＇.