气候变化领域集成服务门户(CCPortal): Investigating the origin and genetic diversity of improved Eucalyptus grandis populations in Brazil

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DOI	10.1016/j.foreco.2019.05.071
	Investigating the origin and genetic diversity of improved Eucalyptus grandis populations in Brazil
	Miranda A.C.; da Silva P.H.M.; Moraes M.L.T.; Lee D.J.; Sebbenn A.M.
发表日期	2019
ISSN	0378-1127
起始页码	130
结束页码	138
卷号	448
英文摘要	To better understand the genetic variability among and within Eucalyptus grandis populations introduced in Brazil, we use microsatellite loci to investigate the mating system, genetic structure, and Australian origins of several introduced provenances. Our sample includes 981 trees from ten Brazilian populations and 254 trees from 18 Australian populations. Significant higher observed heterozygosity (Ho) and significant lower fixation index (F) was detected in grouped Brazilian provenance (Ho = 0.753, F = 0.140) than in Australian samples (Ho = 0.680, F = 0.220). However, Brazilian samples presented significantly lower genetic differentiation (GST ′) among populations (0.541) than Australian populations (0.838) indicating that the overall genetic diversity captured in the Brazilian collection is low due to the limited number of populations represented. All sampled Brazilian populations showed 100% correct expectation of attribution to their reference population, showing consistency with historical information. A lower fixation index (F) was detected in Brazilian seed trees (−0.101) than their offspring (0.140), suggesting selection against inbred individuals between seedling and adult stages. The outcrossing rate (tm) was high (0.994) with low variability among populations (0.921–0.969). However, some mating occurred between related trees (tm-ts = 0.149) and were correlated (rp(m) = 0.113), indicating that some offspring are inbred and families are composed of different levels of relatedness. The coancestry (Θ = 0.141) was higher and the effective size within families (Ne = 3.09) lower than that expected for half-sib families (Θ = 0.125; Ne = 4). Brazilian E. grandis populations offer the possibility to develop new breeding populations with high genetic variability due to their differing origins combined with individual selection. © 2019 Elsevier B.V.
英文关键词	Genetic diversity; Heritability; Inbreeding; Mating system; Tree breeding
语种	英语
scopus关键词	Biodiversity; Genetic diversity; Heritability; Inbreeding; Mating system; Tree breeding; Forestry; genetic differentiation; heritability; inbreeding; population structure; reproductive behavior; reproductive strategy; tree; Brazil; Differentiation; Eucalyptus Grandis; Provenance; Samples; Seed Trees; Systems; Variability; Eucalyptus grandis
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155901
作者单位	Instituto de Pesquisa e Estudos Florestais (IPEF), Via Comendador Pedro Morganti, 3500, Bairro Monte Alegre, CEP 13415-000, Piracicaba, São Paulo State, Brazil; Universidade Estadual de São Paulo (UNESP/Botucatu), Rua José Barbosa de Barros, 1780, CP 237, CEP 18.603-970, Botucatu, São Paulo State, Brazil; Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Avenida Pádua Dias, 11, CP 9, CEP 13418-900, Piracicaba, São Paulo State, Brazil; University of the Sunshine Coast, Locked Bag 4, Maroochydore DC, Queensland 4558, Australia; Universidade Estadual de São Paulo (UNESP/Ilha Solteira), Av. Brasil Centro, 56, CP 31, CEP, 15385-000, Ilha Solteira, São Paulo State, Brazil; Instituto Florestal de São Paulo (IF), CP 1322, CEP 01059-970São Paulo State, Brazil
推荐引用方式 GB/T 7714	Miranda A.C.,da Silva P.H.M.,Moraes M.L.T.,et al. Investigating the origin and genetic diversity of improved Eucalyptus grandis populations in Brazil[J],2019,448.
APA	Miranda A.C.,da Silva P.H.M.,Moraes M.L.T.,Lee D.J.,&Sebbenn A.M..(2019).Investigating the origin and genetic diversity of improved Eucalyptus grandis populations in Brazil.Forest Ecology and Management,448.
MLA	Miranda A.C.,et al."Investigating the origin and genetic diversity of improved Eucalyptus grandis populations in Brazil".Forest Ecology and Management 448(2019).