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Citation:

Evaluation of Important Traits of Different Clones of North-Typed Populus deltoides

  • Received Date: 2015-09-23
  • [Objective] To select new germplasm for integrative breeding of poplar new varieties for industrial timber with high-yielding, superior quality and outstanding efficient traits.[Method] The comprehensive evaluation and subordinate function were used to analyze and evaluate comprehensively the growth, photosynthetic productivity, water use efficiency (WUE) and nutrient use efficiency (NUE) of North-typed Populus deltoides germplasm resources.[Result] (1). There were significant or very significant differences in growth, photosynthetic productivity, WUE and NUE among different genotypes in the same provenance and among different provenances. (2). The traits of North-typed P. deltoides were significantly or very significantly correlated to DBH growth, including total leaf area, leaf number, leaf number growth rate, internode length, respiration rate, N transfer rate, N content in leaf & WUE in the suitable growth period. (3). According to comprehensive evaluation, 8 clones with high growth, 8 with high growth and photosynthetic productivity, 8 with high growth and WUE, and 8 with high growth and NUE were selected. Among them, 5 clones were found with high growth and high environmental resources use efficiency.[Conclusion] The abundant variations of North-typed P. deltoides provide a basis for breeding parents in the provenances and individuals levels. The total leaf area, leaf number growth rate, respiration rate, N transfer rate, and WUE in the suitable growth period can be used as selection index. The excellent germplasm, including 5 best clones, selected by complex evaluation, could be applied in poplar breeding.
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Evaluation of Important Traits of Different Clones of North-Typed Populus deltoides

  • 1. State Key Laboratory of Forest Genetics and Tree Breeding, Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China

Abstract: [Objective] To select new germplasm for integrative breeding of poplar new varieties for industrial timber with high-yielding, superior quality and outstanding efficient traits.[Method] The comprehensive evaluation and subordinate function were used to analyze and evaluate comprehensively the growth, photosynthetic productivity, water use efficiency (WUE) and nutrient use efficiency (NUE) of North-typed Populus deltoides germplasm resources.[Result] (1). There were significant or very significant differences in growth, photosynthetic productivity, WUE and NUE among different genotypes in the same provenance and among different provenances. (2). The traits of North-typed P. deltoides were significantly or very significantly correlated to DBH growth, including total leaf area, leaf number, leaf number growth rate, internode length, respiration rate, N transfer rate, N content in leaf & WUE in the suitable growth period. (3). According to comprehensive evaluation, 8 clones with high growth, 8 with high growth and photosynthetic productivity, 8 with high growth and WUE, and 8 with high growth and NUE were selected. Among them, 5 clones were found with high growth and high environmental resources use efficiency.[Conclusion] The abundant variations of North-typed P. deltoides provide a basis for breeding parents in the provenances and individuals levels. The total leaf area, leaf number growth rate, respiration rate, N transfer rate, and WUE in the suitable growth period can be used as selection index. The excellent germplasm, including 5 best clones, selected by complex evaluation, could be applied in poplar breeding.

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