GSTDTAP  > 气候变化
DOI10.1016/j.foreco.2019.05.071
Investigating the origin and genetic diversity of improved Eucalyptus grandis populations in Brazil
Miranda, Aline C.1; da Silva, Paulo H. M.1,2,3; Moraes, Mario L. T.1,5; Lee, David J.4; Sebbenn, Alexandre M.5,6
2019-09-15
发表期刊FOREST ECOLOGY AND MANAGEMENT
ISSN0378-1127
EISSN1872-7042
出版年2019
卷号448页码:130-138
文章类型Article
语种英语
国家Brazil; Australia
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 (H-o) and significant lower fixation index (F) was detected in grouped Brazilian provenance (H-o = 0.753, F = 0.140) than in Australian samples (H-o = 0.680, F = 0.220). However, Brazilian samples presented significantly lower genetic differentiation (G(ST)') 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 (t(m)) was high (0.994) with low variability among populations (0.921-0.969). However, some mating occurred between related trees (t(m) - t(s) = 0.149) and were correlated (r(p(m)) = 0.113), indicating that some offspring are inbred and families are composed of different levels of relatedness. The coancestry (Theta = 0.141) was higher and the effective size within families (N-e = 3.09) lower than that expected for half-sib families (Theta = 0.125; N-e = 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.


英文关键词Genetic diversity Heritability Inbreeding Mating system Tree breeding
领域气候变化
收录类别SCI-E
WOS记录号WOS:000486553900014
WOS关键词OPEN-POLLINATED PROGENIES ; OUTCROSSING RATE ; INBREEDING DEPRESSION ; SEED ORCHARD ; SELECTION ; POLLEN ; GROWTH ; MICROSATELLITES ; RESISTANCE ; UROPHYLLA
WOS类目Forestry
WOS研究方向Forestry
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/187052
专题气候变化
作者单位1.IPEF, Via Comendador Pedro Morganti 3500, BR-13415000 Piracicaba, SP, Brazil;
2.Univ Estadual Sao Paulo UNESP Botucatu, Rua Jose Barbosa de Barros 1780,CP 237, BR-18603970 Botucatu, SP, Brazil;
3.Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Ave Padua Dias 11,CP 9, BR-13418900 Piracicaba, SP, Brazil;
4.Univ Sunshine Coast, Locked Bag 4, Maroochydore, Qld 4558, Australia;
5.Univ Estadual Sao Paulo UNESP Ilha Solteira, Av Brasil Ctr 56,CP 31, BR-15385000 Ilha Solteira, SP, Brazil;
6.Inst Florestal Sao Paulo IF, CP 1322, BR-01059970 Sao Paulo, SP, Brazil
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GB/T 7714
Miranda, Aline C.,da Silva, Paulo H. M.,Moraes, Mario L. T.,et al. Investigating the origin and genetic diversity of improved Eucalyptus grandis populations in Brazil[J]. FOREST ECOLOGY AND MANAGEMENT,2019,448:130-138.
APA Miranda, Aline C.,da Silva, Paulo H. M.,Moraes, Mario L. T.,Lee, David J.,&Sebbenn, Alexandre M..(2019).Investigating the origin and genetic diversity of improved Eucalyptus grandis populations in Brazil.FOREST ECOLOGY AND MANAGEMENT,448,130-138.
MLA Miranda, Aline C.,et al."Investigating the origin and genetic diversity of improved Eucalyptus grandis populations in Brazil".FOREST ECOLOGY AND MANAGEMENT 448(2019):130-138.
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