Regional testing of triploid hybrid clones of populus tomentosa

Liang Li; Jiahua Du; Lexun Ma; Changjun Ding; Pingdong Zhang; Xiangyang Kang

doi:10.1186/s12870-023-04304-w

Regional testing of triploid hybrid clones of populus tomentosa

BMC Plant Biol. 2023 May 25;23(1):277. doi: 10.1186/s12870-023-04304-w.

Authors

Liang Li^{1

2

3}, Jiahua Du^{1

2

3}, Lexun Ma^{1

2

3}, Changjun Ding⁴, Pingdong Zhang^{5

6

7}, Xiangyang Kang^{1

2

3}

Affiliations

¹ State Key Laboratory of Efficient Production of Forest Tree Resources, Beijing Forestry University, Beijing, 100083, China.
² Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Beijing Forestry University, Beijing, 100083, China.
³ College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China.
⁴ State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China.
⁵ State Key Laboratory of Efficient Production of Forest Tree Resources, Beijing Forestry University, Beijing, 100083, China. zhangpd@bjfu.edu.cn.
⁶ Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Beijing Forestry University, Beijing, 100083, China. zhangpd@bjfu.edu.cn.
⁷ College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China. zhangpd@bjfu.edu.cn.

Abstract

Background: Triploid Populus tomentosa, a timber tree species, has been widely planted in northern China owing to its potential high yields and high wood quality. Though genetic variances in growth traits and wood properties have been reported across several planting sites, regional testing of triploid hybrid clones of P. tomentosa has not been conducted on a large scale.

Results: Ten 5-year clonal trials were used to evaluate the inheritance of growth traits, to determine suitable deployment zones, and to identify optimal triploid clones at each experimental site to determine the clones that would be suitable at all sites. A total of 2,430 trees from nine triploid hybrid clones were sampled during the ten trials. The clonal and site effects and clone × site interactions were highly significant (P < 0.001) for all the studied growth and yield traits. The estimated repeatability of means for diameter at breast height (DBH) and tree height (H) was 0.83, which was slightly higher than for stem volume (SV) and estimated stand volume (ESV) (0.78). The Weixian (WX), Gaotang (GT), and Yanzhou (YZ) sites were each considered to be suitable deployment zones, and the Zhengzhou (ZZ), Taiyuan (TY), Pinggu (PG), and Xiangfen (XF) sites were found to be the optimal deployment zones. The TY and ZZ sites were the best discriminative environments, and the GT and XF sites were the best representative environments. GGE pilot analysis revealed that yield performance and stability were significantly different among all the studied triploid hybrid clones across the ten test sites. It was therefore necessary to develop a suitable triploid hybrid clone that could do well at each site. Taking into account both yield performance and stability, the triploid hybrid clone S2 was determined to be an ideal genotype.

Conclusions: For triploid hybrid clones, the WX, GT, and YZ sites represented suitable deployment zones and the ZZ, TY, PG, and XF sites represented optimal deployment zones. Yield performance and stability were significantly different among all the studied triploid hybrid clones across the ten test sites. Developing a suitable triploid hybrid clone that could do well at all sites was therefore desirable.

Keywords: Deployment zone; Genetic variation; Growth trait; Regional test; Stability analysis; Yield performance.

MeSH terms

China
Genotype
Inheritance Patterns
Populus* / genetics
Trees
Triploidy*

Grants and funding

2022YFD2200301-02/National Key Research and Development Program of China