Family Variation and Selection of Growth and Quality Characteristics of 5-Year-Old Schima superba Seedlings

XIN Na-na; ZHANG Rui; FAN Hui-hua; CHEN Kang; XU You-ming; ZHOU Zhi-chun

The family tests including about 140 Schima superba families at the age of five were conducted at Jian'ou of Fujian and Yongfeng of Jiangxi to reveal the genetic variation and the interaction of family and site for the growth and stem form quality characteristics. The result of variance analysis showed that there existed significant differences in growth and stem form quality characteristics among the families tested. The differences in the interaction effect of family and site were also significant except for the biggest branch angle in the third group. The tree height, DBH and crown width in two locations were under moderate to strong genetic control, and the family heritability was 0.36-0.87. The family heritability of other characteristics were relatively low in the overall level and under moderate to weak genetic control. There was an extremely significant positive correlation among tree height, DBH, and crown width. The genetic correlation coefficient was 0.572-0.928. The biggest branch size also had an extremely significant positive correlation with tree height and DBH, so it is needed to strengthen the pruning in the early period of forest management to cultivate high quality timber. Based on the tree height, 24 Schima superba families from Jian'ou of Fujian and 17 families from Yongfeng of Jiangxi were selected as early-fast-growing families.

1. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China

2. College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, Hubei, China

3. Fujian Academy of Forestry, Fuzhou 350012, Fujian, China

4. Guanshan Forest Farm of Yongfeng County, Jiangxi Province, Yongfeng 331500, Jiangxi, China

Received Date: 2013-08-27

Abstract: The family tests including about 140 Schima superba families at the age of five were conducted at Jian'ou of Fujian and Yongfeng of Jiangxi to reveal the genetic variation and the interaction of family and site for the growth and stem form quality characteristics. The result of variance analysis showed that there existed significant differences in growth and stem form quality characteristics among the families tested. The differences in the interaction effect of family and site were also significant except for the biggest branch angle in the third group. The tree height, DBH and crown width in two locations were under moderate to strong genetic control, and the family heritability was 0.36-0.87. The family heritability of other characteristics were relatively low in the overall level and under moderate to weak genetic control. There was an extremely significant positive correlation among tree height, DBH, and crown width. The genetic correlation coefficient was 0.572-0.928. The biggest branch size also had an extremely significant positive correlation with tree height and DBH, so it is needed to strengthen the pruning in the early period of forest management to cultivate high quality timber. Based on the tree height, 24 Schima superba families from Jian'ou of Fujian and 17 families from Yongfeng of Jiangxi were selected as early-fast-growing families.

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Family Variation and Selection of Growth and Quality Characteristics of 5-Year-Old Schima superba Seedlings

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