The selection of dwarfing rootstock of Carya illinoensis

doi:10.3969/j.issn.1000-2006.2015.04.003

LE Dongliang,LI Yongrong,PENG fangren,WANG Kechun,HE Haiyang,LI Xiaofei

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2015, Vol. 39 ›› Issue (04) : 13-18.

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

The selection of dwarfing rootstock of Carya illinoensis

LE Dongliang^1,2,LI Yongrong²,PENG fangren^1*,WANG Kechun¹,HE Haiyang¹,LI Xiaofei¹

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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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LE Dongliang,LI Yongrong,PENG fangren,WANG Kechun,HE Haiyang,LI Xiaofei. The selection of dwarfing rootstock of Carya illinoensis[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2015, 39(04): 13-18 https://doi.org/10.3969/j.issn.1000-2006.2015.04.003

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