Estimation of the genetic parameters based on HalfsibBV package and integrated selection for Zelkova schneideriana families

doi:10.3969/j.issn.1000-2006.201807004

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2019, Vol. 62 ›› Issue (04): 8-16.doi: 10.3969/j.issn.1000-2006.201807004

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Estimation of the genetic parameters based on HalfsibBV package and integrated selection for Zelkova schneideriana families

LI Tingting¹,YUAN Weigao^1*,WEN Lina²,ZHU Jinru¹,LIU Jianling²,QIU Shuai³,ZHANG Dawei²

(1. Zhejiang Academy of Forestry, Hangzhou 310023, China; 2.Yunhe County Forestry Bureau of Zhejiang Province, Yunhe 323600, China; 3. Hangzhou Landscaping Incorporated Company, Hangzhou 310020, China)

Online:2019-07-22 Published:2019-07-22

Abstract

Abstract: 【Objective】This study was conducted to analyze the genetic variation and parameters of the growth characteristics of Zelkova schneideriana, based on a progeny test containing 21 families from 4 producing origins in Zhejiang, Jiangsu, Yunnan and Hunan. Superior families and individuals were also selected during this research. 【Method】In this study, the integrated selection method of multiple comparisons and a comprehensive index, combined with a regularity index, was used to select superior families. Generalized linear mixed models and the HalfsibBV package were used to calculate the genetic parameters such as the heritability, genetic correlation coefficient, and breeding values of the families and individuals. 【Result】The variation of the diameter at breast height(DBH), height, height under branch(HUB), crown and volume in 7-year-old trees were 6.8 to 9.5 cm, 4.7 to 7.1 m, 1.4 to 2.1 m,3.0 to 4.2 m and 0.008 2 to 0.020 6 m³, respectively. The family heritabilities ranged from 0.73 to 0.87, whereas the individual heritabilities ranged from 0.370 to 0.817, and the genetic variation coefficients ranged from 8.35% to 24.13%. The correlation analysis showed that only the HUB was moderately correlated with the investigated traits, while all other growth traits were significantly positively correlated with each other. Eight families were selected, with 30% as the selection rate; these were Y10, Y15, S02, S05, S14, S15, X02 and Z07. With the introduction of the regularity degree as the auxiliary screening index, the families with excellent growth characters, which could meet the requirement of DBH, height, and crown of more than 80%, were Y10, S02 and S05. Family selection, based on the breeding values, was consistent with the trend of the integrated selection results. Sixty-five superior individuals from 14 families were selected according to the individual breeding values. 【Conclusion】The characteristics of Z. schneideriana were significantly different from each other at the family level, with the family selection having great potential. Some families with good growth and a high consistency can be selected by the combined selection method of HalfsibBV software, a comprehensive index, and a uniformity index. The HalfsibBV software package can be used as an effective tool to select excellent families and individuals.

CLC Number:

S722.3

LI Tingting,YUAN Weigao,WEN Lina,ZHU Jinru,LIU Jianling,QIU Shuai,ZHANG Dawei. Estimation of the genetic parameters based on HalfsibBV package and integrated selection for Zelkova schneideriana families[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2019, 62(04): 8-16.

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Estimation of the genetic parameters based on HalfsibBV package and integrated selection for Zelkova schneideriana families

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