Inferring mating system parameters in forage peanut, Arachis pintoi, for Brazilian Amazon conditions
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Amazonica |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400277 |
Resumo: | ABSTRACT The search for alternatives to increase productivity and sustainability of livestock production in the Amazon region without increasing deforestation is challenging. Mixed pastures of grasses with forage peanut (Arachis pintoi) have shown positive economic impacts. However, gaps in the knowledge of the reproductive biology of A. pintoi have limited the development of new cultivars adapted to the environmental variations in the Brazilian Amazon. Pasture consortiums of Brachiaria humidicola with forage peanuts (cv. Mandobi) resulted in a 42% increase in weight gain productivity. New cultivars better adapted to the Amazon climate should bring even greater gains. We evaluated the mating system in twenty A. pintoi accessions, and approximately 40 offspring per accession genotyped with eight microsatellites (or markers). The parameters of genetic diversity and inbreeding, the outcrossing rate and coancestry were calculated. The observed heterozygosity was significantly higher and the fixation index was significantly lower in adults compared with the offspring. The crossing rate was variable among genotypes (2 to 80%), and the mean outcrossing rate was 36%. These results indicate that pollinator presence in pastures can influence gene flow in A. pintoi more than expected. Arachis pintoi presented a mixed mating system with a predominance of selfing, and families presented inbreeding and different levels of relatedness. New strategies of genotype conservation are needed to avoid pollinator-mediated crossing between accessions. |
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Inferring mating system parameters in forage peanut, Arachis pintoi, for Brazilian Amazon conditionsreproductive systemArachis pintoiSSRcrossing rateABSTRACT The search for alternatives to increase productivity and sustainability of livestock production in the Amazon region without increasing deforestation is challenging. Mixed pastures of grasses with forage peanut (Arachis pintoi) have shown positive economic impacts. However, gaps in the knowledge of the reproductive biology of A. pintoi have limited the development of new cultivars adapted to the environmental variations in the Brazilian Amazon. Pasture consortiums of Brachiaria humidicola with forage peanuts (cv. Mandobi) resulted in a 42% increase in weight gain productivity. New cultivars better adapted to the Amazon climate should bring even greater gains. We evaluated the mating system in twenty A. pintoi accessions, and approximately 40 offspring per accession genotyped with eight microsatellites (or markers). The parameters of genetic diversity and inbreeding, the outcrossing rate and coancestry were calculated. The observed heterozygosity was significantly higher and the fixation index was significantly lower in adults compared with the offspring. The crossing rate was variable among genotypes (2 to 80%), and the mean outcrossing rate was 36%. These results indicate that pollinator presence in pastures can influence gene flow in A. pintoi more than expected. Arachis pintoi presented a mixed mating system with a predominance of selfing, and families presented inbreeding and different levels of relatedness. New strategies of genotype conservation are needed to avoid pollinator-mediated crossing between accessions.Instituto Nacional de Pesquisas da Amazônia2019-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400277Acta Amazonica v.49 n.4 2019reponame:Acta Amazonicainstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPA10.1590/1809-4392201900200info:eu-repo/semantics/openAccessOLIVEIRA,Jônatas Chagas deRUFINO,Polinar BandeiraAZÊVEDO,Hellen Sandra Freires da SilvaSOUSA,Adna Cristina Barbosa deASSIS,Giselle Mariano Lessa deSILVA,Lucielio Manoel daSEBBENN,Alexandre MagnoCAMPOS,Tatiana deeng2019-11-06T00:00:00Zoai:scielo:S0044-59672019000400277Revistahttps://acta.inpa.gov.br/PUBhttps://old.scielo.br/oai/scielo-oai.phpacta@inpa.gov.br||acta@inpa.gov.br1809-43920044-5967opendoar:2019-11-06T00:00Acta Amazonica - Instituto Nacional de Pesquisas da Amazônia (INPA)false |
dc.title.none.fl_str_mv |
Inferring mating system parameters in forage peanut, Arachis pintoi, for Brazilian Amazon conditions |
title |
Inferring mating system parameters in forage peanut, Arachis pintoi, for Brazilian Amazon conditions |
spellingShingle |
Inferring mating system parameters in forage peanut, Arachis pintoi, for Brazilian Amazon conditions OLIVEIRA,Jônatas Chagas de reproductive system Arachis pintoi SSR crossing rate |
title_short |
Inferring mating system parameters in forage peanut, Arachis pintoi, for Brazilian Amazon conditions |
title_full |
Inferring mating system parameters in forage peanut, Arachis pintoi, for Brazilian Amazon conditions |
title_fullStr |
Inferring mating system parameters in forage peanut, Arachis pintoi, for Brazilian Amazon conditions |
title_full_unstemmed |
Inferring mating system parameters in forage peanut, Arachis pintoi, for Brazilian Amazon conditions |
title_sort |
Inferring mating system parameters in forage peanut, Arachis pintoi, for Brazilian Amazon conditions |
author |
OLIVEIRA,Jônatas Chagas de |
author_facet |
OLIVEIRA,Jônatas Chagas de RUFINO,Polinar Bandeira AZÊVEDO,Hellen Sandra Freires da Silva SOUSA,Adna Cristina Barbosa de ASSIS,Giselle Mariano Lessa de SILVA,Lucielio Manoel da SEBBENN,Alexandre Magno CAMPOS,Tatiana de |
author_role |
author |
author2 |
RUFINO,Polinar Bandeira AZÊVEDO,Hellen Sandra Freires da Silva SOUSA,Adna Cristina Barbosa de ASSIS,Giselle Mariano Lessa de SILVA,Lucielio Manoel da SEBBENN,Alexandre Magno CAMPOS,Tatiana de |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
OLIVEIRA,Jônatas Chagas de RUFINO,Polinar Bandeira AZÊVEDO,Hellen Sandra Freires da Silva SOUSA,Adna Cristina Barbosa de ASSIS,Giselle Mariano Lessa de SILVA,Lucielio Manoel da SEBBENN,Alexandre Magno CAMPOS,Tatiana de |
dc.subject.por.fl_str_mv |
reproductive system Arachis pintoi SSR crossing rate |
topic |
reproductive system Arachis pintoi SSR crossing rate |
description |
ABSTRACT The search for alternatives to increase productivity and sustainability of livestock production in the Amazon region without increasing deforestation is challenging. Mixed pastures of grasses with forage peanut (Arachis pintoi) have shown positive economic impacts. However, gaps in the knowledge of the reproductive biology of A. pintoi have limited the development of new cultivars adapted to the environmental variations in the Brazilian Amazon. Pasture consortiums of Brachiaria humidicola with forage peanuts (cv. Mandobi) resulted in a 42% increase in weight gain productivity. New cultivars better adapted to the Amazon climate should bring even greater gains. We evaluated the mating system in twenty A. pintoi accessions, and approximately 40 offspring per accession genotyped with eight microsatellites (or markers). The parameters of genetic diversity and inbreeding, the outcrossing rate and coancestry were calculated. The observed heterozygosity was significantly higher and the fixation index was significantly lower in adults compared with the offspring. The crossing rate was variable among genotypes (2 to 80%), and the mean outcrossing rate was 36%. These results indicate that pollinator presence in pastures can influence gene flow in A. pintoi more than expected. Arachis pintoi presented a mixed mating system with a predominance of selfing, and families presented inbreeding and different levels of relatedness. New strategies of genotype conservation are needed to avoid pollinator-mediated crossing between accessions. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-12-01 |
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=S0044-59672019000400277 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400277 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1809-4392201900200 |
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 |
Instituto Nacional de Pesquisas da Amazônia |
publisher.none.fl_str_mv |
Instituto Nacional de Pesquisas da Amazônia |
dc.source.none.fl_str_mv |
Acta Amazonica v.49 n.4 2019 reponame:Acta Amazonica instname:Instituto Nacional de Pesquisas da Amazônia (INPA) instacron:INPA |
instname_str |
Instituto Nacional de Pesquisas da Amazônia (INPA) |
instacron_str |
INPA |
institution |
INPA |
reponame_str |
Acta Amazonica |
collection |
Acta Amazonica |
repository.name.fl_str_mv |
Acta Amazonica - Instituto Nacional de Pesquisas da Amazônia (INPA) |
repository.mail.fl_str_mv |
acta@inpa.gov.br||acta@inpa.gov.br |
_version_ |
1752129841162878976 |