Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Genetics and Molecular Biology |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000400301 |
Resumo: | Abstract Given its high-valued wood, the African mahogany (Khaya grandifoliola) has been envisaged as a renewable source of tropical hardwoods in Brazil. However, there are concerns about the hypothesized low diversity among the few K. grandifoliola germplasm sources introduced in the country. Using eight microsatellite markers, we evaluated the genetic diversity and divergence among 53 superior trees selected from three provenances of K. grandifoliola located in the state of Para. These populations are among the oldest plantations (>15 years) in Brazil and, therefore, the country's main seed sources. The average number of alleles per locus was 5.9, expected heterozygosity was moderate (^=0.56) and lower than the high observed heterozygosity (HO=0.74). Therefore, the intrapopulation fixation index was negative (f=-0.31) indicating the possibility that selection of superior trees might have favored heterozygous plants with heterosis. No genetic structure was observed between provenances. The genetic diversity observed within selected trees, with an effective population size (Ne) of 30.4, is comparable to that of natural populations of African and Brazilian mahoganies. Therefore, our results contradict the idea that the genetic diversity of K. grandifoliola introduced in Brazil is low and show that our germplasm can be exploited for breeding purposes. |
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Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in BrazilMicrosatellitesSSRgenetic structuregenetic divergencehardwoodAbstract Given its high-valued wood, the African mahogany (Khaya grandifoliola) has been envisaged as a renewable source of tropical hardwoods in Brazil. However, there are concerns about the hypothesized low diversity among the few K. grandifoliola germplasm sources introduced in the country. Using eight microsatellite markers, we evaluated the genetic diversity and divergence among 53 superior trees selected from three provenances of K. grandifoliola located in the state of Para. These populations are among the oldest plantations (>15 years) in Brazil and, therefore, the country's main seed sources. The average number of alleles per locus was 5.9, expected heterozygosity was moderate (^=0.56) and lower than the high observed heterozygosity (HO=0.74). Therefore, the intrapopulation fixation index was negative (f=-0.31) indicating the possibility that selection of superior trees might have favored heterozygous plants with heterosis. No genetic structure was observed between provenances. The genetic diversity observed within selected trees, with an effective population size (Ne) of 30.4, is comparable to that of natural populations of African and Brazilian mahoganies. Therefore, our results contradict the idea that the genetic diversity of K. grandifoliola introduced in Brazil is low and show that our germplasm can be exploited for breeding purposes.Sociedade Brasileira de Genética2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000400301Genetics and Molecular Biology v.43 n.2 2020reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/1678-4685-gmb-2018-0162info:eu-repo/semantics/openAccessSoares,Sabrina DelgadoBandeira,Ludmila FerreiraRibeiro,Stela BarrosTelles,Mariana Pires de CamposSilva,João Augusto daBorges,Canrobert TorminCoelho,Alexandre Siqueira GuedesNovaes,Evandroeng2020-04-22T00:00:00Zoai:scielo:S1415-47572020000400301Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:2020-04-22T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false |
dc.title.none.fl_str_mv |
Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil |
title |
Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil |
spellingShingle |
Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil Soares,Sabrina Delgado Microsatellites SSR genetic structure genetic divergence hardwood |
title_short |
Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil |
title_full |
Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil |
title_fullStr |
Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil |
title_full_unstemmed |
Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil |
title_sort |
Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil |
author |
Soares,Sabrina Delgado |
author_facet |
Soares,Sabrina Delgado Bandeira,Ludmila Ferreira Ribeiro,Stela Barros Telles,Mariana Pires de Campos Silva,João Augusto da Borges,Canrobert Tormin Coelho,Alexandre Siqueira Guedes Novaes,Evandro |
author_role |
author |
author2 |
Bandeira,Ludmila Ferreira Ribeiro,Stela Barros Telles,Mariana Pires de Campos Silva,João Augusto da Borges,Canrobert Tormin Coelho,Alexandre Siqueira Guedes Novaes,Evandro |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Soares,Sabrina Delgado Bandeira,Ludmila Ferreira Ribeiro,Stela Barros Telles,Mariana Pires de Campos Silva,João Augusto da Borges,Canrobert Tormin Coelho,Alexandre Siqueira Guedes Novaes,Evandro |
dc.subject.por.fl_str_mv |
Microsatellites SSR genetic structure genetic divergence hardwood |
topic |
Microsatellites SSR genetic structure genetic divergence hardwood |
description |
Abstract Given its high-valued wood, the African mahogany (Khaya grandifoliola) has been envisaged as a renewable source of tropical hardwoods in Brazil. However, there are concerns about the hypothesized low diversity among the few K. grandifoliola germplasm sources introduced in the country. Using eight microsatellite markers, we evaluated the genetic diversity and divergence among 53 superior trees selected from three provenances of K. grandifoliola located in the state of Para. These populations are among the oldest plantations (>15 years) in Brazil and, therefore, the country's main seed sources. The average number of alleles per locus was 5.9, expected heterozygosity was moderate (^=0.56) and lower than the high observed heterozygosity (HO=0.74). Therefore, the intrapopulation fixation index was negative (f=-0.31) indicating the possibility that selection of superior trees might have favored heterozygous plants with heterosis. No genetic structure was observed between provenances. The genetic diversity observed within selected trees, with an effective population size (Ne) of 30.4, is comparable to that of natural populations of African and Brazilian mahoganies. Therefore, our results contradict the idea that the genetic diversity of K. grandifoliola introduced in Brazil is low and show that our germplasm can be exploited for breeding purposes. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000400301 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000400301 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1678-4685-gmb-2018-0162 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Genética |
publisher.none.fl_str_mv |
Sociedade Brasileira de Genética |
dc.source.none.fl_str_mv |
Genetics and Molecular Biology v.43 n.2 2020 reponame:Genetics and Molecular Biology instname:Sociedade Brasileira de Genética (SBG) instacron:SBG |
instname_str |
Sociedade Brasileira de Genética (SBG) |
instacron_str |
SBG |
institution |
SBG |
reponame_str |
Genetics and Molecular Biology |
collection |
Genetics and Molecular Biology |
repository.name.fl_str_mv |
Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG) |
repository.mail.fl_str_mv |
||editor@gmb.org.br |
_version_ |
1752122389766864896 |