JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2015, Vol. 39 ›› Issue (04): 13-18.doi: 10.3969/j.issn.1000-2006.2015.04.003

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The selection of dwarfing rootstock of Carya illinoensis

LE Dongliang1,2,LI Yongrong2,PENG fangren1*,WANG Kechun1,HE Haiyang1,LI Xiaofei1   

  1. 1. College of Forestry, Nanjing Forestry University, Nanjing 210037, China;
    2. Nanjing Green Universe Pecan Science &
    Technology Co., Ltd., Nanjing 210014, China
  • Online:2015-07-31 Published:2015-07-31

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 characteristics 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.

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