Multi-Level Genetic Variation and Selection Strategy of <i>Neolamarckia cadamba</i> in Successive Years
<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&g...
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2021-10-01
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| 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 |
| collection | DOAJ |
| 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. |
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| institution | Directory Open Access Journal |
| issn | 1999-4907 |
| language | English |
| last_indexed | 2024-03-10T05:29:36Z |
| publishDate | 2021-10-01 |
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| series | Forests |
| spelling | doaj.art-7b24af4dba7346af9b9da73c9d2893b72023-11-22T23:23:58ZengMDPI AGForests1999-49072021-10-011211145510.3390/f12111455Multi-Level Genetic Variation and Selection Strategy of <i>Neolamarckia cadamba</i> in Successive YearsQingmin Que0Chunmei Li1Buye Li2Huiyun Song3Pei Li4Ruiqi Pian5Huaqing Li6Xiaoyang Chen7Kunxi Ouyang8State Key Laboratory for Conservaion and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Wushan Road 483, Tianhe District, Guangzhou 510642, ChinaState Key Laboratory for Conservaion and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Wushan Road 483, Tianhe District, Guangzhou 510642, ChinaState Key Laboratory for Conservaion and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Wushan Road 483, Tianhe District, Guangzhou 510642, ChinaState Key Laboratory for Conservaion and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Wushan Road 483, Tianhe District, Guangzhou 510642, ChinaState Key Laboratory for Conservaion and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Wushan Road 483, Tianhe District, Guangzhou 510642, ChinaState Key Laboratory for Conservaion and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Wushan Road 483, Tianhe District, Guangzhou 510642, ChinaChina Forestry Group Leizhou Forestry Bereau Co., Ltd., Zhanjiang 524348, ChinaState Key Laboratory for Conservaion and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Wushan Road 483, Tianhe District, Guangzhou 510642, ChinaGuangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, South China Agricultural University, Wushan Road 483, Tianhe District, Guangzhou 510642, China<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.https://www.mdpi.com/1999-4907/12/11/1455genetic variabilitygrowth trait<i>Neolamarckia cadamba</i>early selection |
| spellingShingle | 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 Forests genetic variability growth trait <i>Neolamarckia cadamba</i> early selection |
| title | 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_short | 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 |
| topic | genetic variability growth trait <i>Neolamarckia cadamba</i> early selection |
| url | https://www.mdpi.com/1999-4907/12/11/1455 |
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