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Bulletin of Botanical Research ›› 2026, Vol. 46 ›› Issue (2): 361-377.doi: 10.7525/j.issn.1673-5102.2026.02.014

• Original Paper • Previous Articles     Next Articles

Screening of Superior Families and Reconstruction of Kinship Trees in Populus simonii

Xiaoyu XIE1, Ruizhu LIN2, Taijin ZHANG1, Ruixue WANG1, Hanshi WANG1, Jinwang ZHANG3, Long TIE3, Chunli ZHAO1, Xiyang ZHAO1, Kewei CAI1()   

  1. 1.College of Forestry and Grassland,Jilin Agricultural University,Changchun 130118
    2.College of Landscape Architecture,Northeast Forestry University,Harbin 150040
    3.Tongliao Institute of Forestry and Grassland Science,Tongliao 028000
  • Received:2025-12-08 Online:2026-03-20 Published:2026-04-02
  • Contact: Kewei CAI E-mail:ckwnefu@163.com

Abstract:

To identify purebred tree varieties with well-defined pedigrees, this study examined growth and leaf traits across 20 half-sibling families of Populus simonii. By integrating EST-SSR molecular marker technology, the kinship pedigree was reconstructed, and evaluations and selections were performed for both half-sibling and full-sibling families before and after reconstruction. The results revealed highly significant differences(P<0.01) across all investigated indices among the 20 families. High heritability was observed for each index, and the population exhibited substantial genetic diversity. At a selection rate of 5%, Ps14 was identified as the optimal family; the seedling height and ground stem diameter increased by 55.45% and 40.38%, respectively, compared to the overall mean. Fresh leaf mass, dry leaf mass, leaf length, leaf width, petiole length, leaf area, and leaf vein angle increased by 60.20%, 39.29%, 24.40%, 41.66%, 1.05%, 14.73%, and 68.69%, respectively, compared to the overall mean. Paternity identification of Ps14 offspring was conducted using 15 polymorphic EST-SSR primer pairs, successfully identifying paternal parents for 99% of the offspring. A total of 32 effective paternal parents were identified, among which 12 had higher reproductive contributions under open-pollination conditions. Ps14×M-PS243 was identified through evaluation of the reconstructed full-sib families as an excellent family, with offspring exhibiting a 76.64% increase in height and a 74.34% increase in ground diameter compared to the population mean. Additionally, GCA analysis highlighted M-PS243 as a promising paternal parent. In conclusion, this study utilized molecular markers to reconstruct pedigrees of poplar half-sibling families and evaluate superior families with clear pedigrees, significantly enhancing selection efficiency and providing novel insights for the genetic improvement of poplar and other tree species.

Key words: Populus simonii, family selection, phylogenetic reconstruction

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