Multi-Level Genetic Variation and Selection Strategy of Neolamarckia cadamba in Successive Years

Neolamarckia cadamba (Roxb.) Bosser is a tropical evergreen broadleaf tree species that could play an important role in meeting the increasing demand for wood products. However, multi-level genetic variation and selection efficiency for growth traits in N. cadamba</i&g...

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Autores principales:	Qingmin Que, Chunmei Li, Buye Li, Huiyun Song, Pei Li, Ruiqi Pian, Huaqing Li, Xiaoyang Chen, Kunxi Ouyang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	genetic variability growth trait <i>Neolamarckia cadamba</i> early selection Plant ecology QK900-989
Acceso en línea:	https://doaj.org/article/7b24af4dba7346af9b9da73c9d2893b7
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spelling	oai:doaj.org-article:7b24af4dba7346af9b9da73c9d2893b72021-11-25T17:37:27ZMulti-Level Genetic Variation and Selection Strategy of <i>Neolamarckia cadamba</i> in Successive Years10.3390/f121114551999-4907https://doaj.org/article/7b24af4dba7346af9b9da73c9d2893b72021-10-01T00:00:00Zhttps://www.mdpi.com/1999-4907/12/11/1455https://doaj.org/toc/1999-4907<i>Neolamarckia cadamba</i> (Roxb.) Bosser is a tropical evergreen broadleaf tree species that could play an important role in meeting the increasing demand for wood products. However, multi-level genetic variation and selection efficiency for growth traits in <i>N. cadamba</i> is poorly characterized. We therefore investigated the efficiency of early selection in <i>N. cadamba</i> by monitoring the height (HT), diameter at breast height (DBH), and tree volume (V) in 39 half-sib families from 11 provenances at ages 2, 3, 4, 5, and 6 years in a progeny test. Age-related trends in growth rate, genetic parameters in multi-level, efficiency of early selection, and realized gain in multi-level for growth traits were analyzed. The result showed that genetic variation among families within provenances was higher than that among provenances. The estimated individual heritability values for the growth traits ranged from 0.05 to 0.26, indicating that the variation of growth traits in <i>N. cadamba</i> was subject to weak or intermediate genetic control. The age–age genetic correlations for growth traits were always positive and high (0.51–0.99), and the relationships between the genetic/phenotypic correlations and the logarithm of the age ratio (<i>LAR</i>) were described well by linear models (<i>R</i><sup>2</sup> > 0.85, except the fitting coefficient of genetic correlation and <i>LAR</i> for HT was 0.35). On the basis of an early selection efficiency analysis, we found that it is the best time to perform early selection for <i>N. cadamba</i> at age 5 before half-rotation, and the selection efficiencies were 157.28%, 151.56%, and 127.08% for V, DBH, and HT, respectively. Higher realized gain can be obtained by selecting superior trees from superior families. These results can be expected to provide theoretical guidance and materials for breeding programs in <i>N. cadamba</i> and can even be a reference for breeding strategies of other fast-growing tree species.Qingmin QueChunmei LiBuye LiHuiyun SongPei LiRuiqi PianHuaqing LiXiaoyang ChenKunxi OuyangMDPI AGarticlegenetic variabilitygrowth trait<i>Neolamarckia cadamba</i>early selectionPlant ecologyQK900-989ENForests, Vol 12, Iss 1455, p 1455 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	genetic variability growth trait <i>Neolamarckia cadamba</i> early selection Plant ecology QK900-989
spellingShingle	genetic variability growth trait <i>Neolamarckia cadamba</i> early selection Plant ecology QK900-989 Qingmin Que Chunmei Li Buye Li Huiyun Song Pei Li Ruiqi Pian Huaqing Li Xiaoyang Chen Kunxi Ouyang Multi-Level Genetic Variation and Selection Strategy of <i>Neolamarckia cadamba</i> in Successive Years
description	<i>Neolamarckia cadamba</i> (Roxb.) Bosser is a tropical evergreen broadleaf tree species that could play an important role in meeting the increasing demand for wood products. However, multi-level genetic variation and selection efficiency for growth traits in <i>N. cadamba</i> is poorly characterized. We therefore investigated the efficiency of early selection in <i>N. cadamba</i> by monitoring the height (HT), diameter at breast height (DBH), and tree volume (V) in 39 half-sib families from 11 provenances at ages 2, 3, 4, 5, and 6 years in a progeny test. Age-related trends in growth rate, genetic parameters in multi-level, efficiency of early selection, and realized gain in multi-level for growth traits were analyzed. The result showed that genetic variation among families within provenances was higher than that among provenances. The estimated individual heritability values for the growth traits ranged from 0.05 to 0.26, indicating that the variation of growth traits in <i>N. cadamba</i> was subject to weak or intermediate genetic control. The age–age genetic correlations for growth traits were always positive and high (0.51–0.99), and the relationships between the genetic/phenotypic correlations and the logarithm of the age ratio (<i>LAR</i>) were described well by linear models (<i>R</i><sup>2</sup> > 0.85, except the fitting coefficient of genetic correlation and <i>LAR</i> for HT was 0.35). On the basis of an early selection efficiency analysis, we found that it is the best time to perform early selection for <i>N. cadamba</i> at age 5 before half-rotation, and the selection efficiencies were 157.28%, 151.56%, and 127.08% for V, DBH, and HT, respectively. Higher realized gain can be obtained by selecting superior trees from superior families. These results can be expected to provide theoretical guidance and materials for breeding programs in <i>N. cadamba</i> and can even be a reference for breeding strategies of other fast-growing tree species.
format	article
author	Qingmin Que Chunmei Li Buye Li Huiyun Song Pei Li Ruiqi Pian Huaqing Li Xiaoyang Chen Kunxi Ouyang
author_facet	Qingmin Que Chunmei Li Buye Li Huiyun Song Pei Li Ruiqi Pian Huaqing Li Xiaoyang Chen Kunxi Ouyang
author_sort	Qingmin Que
title	Multi-Level Genetic Variation and Selection Strategy of <i>Neolamarckia cadamba</i> in Successive Years
title_short	Multi-Level Genetic Variation and Selection Strategy of <i>Neolamarckia cadamba</i> in Successive Years
title_full	Multi-Level Genetic Variation and Selection Strategy of <i>Neolamarckia cadamba</i> in Successive Years
title_fullStr	Multi-Level Genetic Variation and Selection Strategy of <i>Neolamarckia cadamba</i> in Successive Years
title_full_unstemmed	Multi-Level Genetic Variation and Selection Strategy of <i>Neolamarckia cadamba</i> in Successive Years
title_sort	multi-level genetic variation and selection strategy of <i>neolamarckia cadamba</i> in successive years
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/7b24af4dba7346af9b9da73c9d2893b7
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Multi-Level Genetic Variation and Selection Strategy of <i>Neolamarckia cadamba</i> in Successive Years

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