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Genetic Variation of Growth Traits and Genotype-by-Environment Interactions in Clones of Catalpa bungei and Catalpa fargesii f. duclouxii

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dc.contributor.author Xiao, Yao
dc.contributor.author Ma, Wenjun
dc.contributor.author Lu, Nan
dc.contributor.author Wang, Zhi
dc.contributor.author Wang, Nan
dc.contributor.author Zhai, Wenji
dc.contributor.author Kong, Lisheng
dc.contributor.author Qu, Guanzheng
dc.contributor.author Wang, Qiuxia
dc.contributor.author Wang, Junhui
dc.date.accessioned 2019-03-02T16:58:04Z
dc.date.available 2019-03-02T16:58:04Z
dc.date.copyright 2019 en_US
dc.date.issued 2019
dc.identifier.citation Xiao, Y., Ma, W., Lu, N., Wang, Z., Wang, N., Zhai, W., Kong, L., Qu, G., Wang, Q. & Wang, J. (2019). Genetic Variation of Growth Traits and Genotype-by- Environment Interactions in Clones of Catalpa bungei and Catalpa fargesii f. duclouxii. Forests, 10(1), 57. https://doi.org/10.3390/f10010057 en_US
dc.identifier.uri http://dx.doi.org/10.3390/f10010057
dc.identifier.uri http://hdl.handle.net/1828/10635
dc.description.abstract Clones of Catalpa bungei and Catalpa fargesii f. duclouxii were studied over several years in central China to explore genetic variation in growth traits and to identify clones of high wood yield and high stability. The genetic parameters for height, diameter at breast height (DBH), and stem volume of clones, were estimated. The effect of clone × year on the increment of stem volume in the two species was analyzed by genotype and genotype × environment (GGE) biplot methods. Significant differences in growth traits among clones and between species were found. The growth of C. bungei exceeded that of C. fargesii f. duclouxii after 4 years. Furthermore, from the 5th year, the repeatability and genetic variation coefficient (GCV) of the C. bungei clones were higher than those of the C. fargesii f. duclouxii clones in most cases. The phenotypic variation coefficient (PCV) of the C. fargesii f. duclouxii clones was significantly lower than that of the C. bungei clones. The repeatability of stem volume was intermediate or high in the two species. ANOVA revealed significant effects of the clone by year interaction in these two species. GGE biplot analysis revealed that wood yield and stability were largely independent in C. bungei; clones 22-03, 19-27, and 20-01 were the optimal clones in this species. In contrast, the optimal clones 63 and 128 of C. fargesii f. duclouxii combined the desired characteristics of high yield and high stability. In conclusion, our results indicated that the height and stem volume of C. bungei was under strong genetic control, whereas that of C. fargesii f. duclouxii was influenced by the environment more than by genetic effects. Genetic improvement by clone selection can be expected to be effective, as the repeatability of stem volume was high. Francis and Kannenberg’s method and GGE biplot analysis were used in combination to evaluate the clones. C. bungei clone 22-03 and C. fargesii f. duclouxii clones 63 and 128 were identified as the optimal clones, which exhibited both a high increment of stem volume and high stability. en_US
dc.description.sponsorship This work is supported by Forestry Industry Research Special Funds for Public Welfare Projects [201404101]. en_US
dc.language.iso en en_US
dc.publisher Forests en_US
dc.subject genetic variation en_US
dc.subject stability of performance en_US
dc.subject clones en_US
dc.subject Catalpa bungei en_US
dc.subject Catalpa fargesii f. duclouxii en_US
dc.title Genetic Variation of Growth Traits and Genotype-by-Environment Interactions in Clones of Catalpa bungei and Catalpa fargesii f. duclouxii en_US
dc.type Article en_US
dc.description.scholarlevel Faculty en_US
dc.description.reviewstatus Reviewed en_US


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