南京林业大学学报（自然科学版）Issue(4)：13-18,6.DOI:10.3969/j.issn.1000-2006.2015.04.003
美国山核桃矮化砧的筛选
The selection of dwarfing rootstock of Carya illinoensis
摘要
Abstract
We used one year old seedlings propagated by open pollinated seeds from nine parent trees and other seeds from unknown parent tress of pecan ( Carya illinoensis) as testing materials. The pecan seedling growth and genetic char⁃acteristics of half⁃sib families were studied. Dwarfing rootstock were selected based on the height phenotype, and then transplanted and investigated.The results showed that the height and stem diameter of different half⁃sib family seedlings were different, and stem diameter and height were significantly correlated. Stem diameter and height of half⁃sib progeny and a mixed population of seedlings showed a normal distribution characteristics. Stem diameter and height were highly influenced by genetic factors The heritability of stem diameter and height were 0.88 and 0.89, respectively. 499 grafted but not stumped plants and 531 dwarfing seedlings were selected in the nursery. After one season�s maintenance, 280 strong grafted but not stumped plants and 382 dwarfing seedlings were preserved. Ten grafting plants and twelve dwarfing seedlings were selected in the second round selection.关键词
美国山核桃/矮化砧/实生选育/矮壮系数Key words
Carya illinoensis/dwarfing rootstock/seedling selection/stocky index分类
农业科技引用本文复制引用
勒栋梁,李永荣,彭方仁,王克春,何海洋,李小飞..美国山核桃矮化砧的筛选[J].南京林业大学学报（自然科学版）,2015,(4):13-18,6.基金项目
国家林业公益性行业科研专项项目（201304711）；江苏省林业三新工程项目［lysx2014（047）］ （）
