Enhancing genetic fitness while maintaining genetic variability in araucaria angustifolia

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Autor(es): dc.contributorInstituto Florestal de São Paulo - IF-
Autor(es): dc.contributorEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorQueen's University Belfast-
Autor(es): dc.creatorMachado, Jose Arimateia Rabelo-
Autor(es): dc.creatorAguiar, Ananda Virgina-
Autor(es): dc.creatorDe Almeida Saraiva Pontinha, Ananias-
Autor(es): dc.creatorSouza, Bruno Marchetti [UNESP]-
Autor(es): dc.creatorSebbenn, Alexandre Magno-
Autor(es): dc.creatorHallsworth, John Edward-
Autor(es): dc.creatorSousa, Valderês Aparecida-
Autor(es): dc.creatorFreitas, Miguel Luiz Menezes-
Data de aceite: dc.date.accessioned2022-08-04T22:09:49Z-
Data de disponibilização: dc.date.available2022-08-04T22:09:49Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.18671/SCIFOR.V49N130.20-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/221792-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/221792-
Descrição: dc.descriptionAraucaria angustifolia provides timber, edible seeds and pharmaceuticals and has a unique ecology (once shared with that of the dinosaurs), yet is now threatened with extinction. Here, we assess and reconcile the counteracting goals of enhancing genetic fitness and maintaining genetic variability during ex-situ conservation of A. angustifolia in a provenance-and-progeny test to improve growth vigor. After 33 years, survival, height, diameter at breast height, and volume of trees were determined. Sixteen selection scenarios were tested using two strategies: Selection among and within progenies, and selection only within progenies, each one for eight values of selection intensity of total survival in the trial (7.6, 11.5, 15.3, 19.1, 22.9, 26.8, 30.6, and 34.4%). The variance components and genetic parameter estimates were determined using REML/BLUP. There was significant genetic variation among provenances and progenies for all traits. For all growth-phenotype traits, the heritability at mean (0.419-0.542) and within progeny level (0.186-0.207) indicate the potential for tree improvement by selection among and within progenies. The selection strategy enhanced growth phenotype whilst maintaining an effective population size of 19.1% selected individuals within progenies (three females and two males). This preserved sufficient genetic variability among and within provenances, and resulted in genetic gain, providing higher-value seed production.-
Descrição: dc.descriptionInstituto Florestal de São Paulo - IF-
Descrição: dc.descriptionEmpresa Brasileira de Pesquisa Agropecuária - Embrapa Florestas-
Descrição: dc.descriptionFaculdade de Engenharia de Ilha Solteira Universidade Estadual Paulista Júlio de Mesquita Filho- UNESP-
Descrição: dc.descriptionInstitute for Global Food Security School of Biological Sciences Queen's University Belfast, Chlorine Gardens-
Descrição: dc.descriptionFaculdade de Engenharia de Ilha Solteira Universidade Estadual Paulista Júlio de Mesquita Filho- UNESP-
Idioma: dc.languageen-
Relação: dc.relationScientia Forestalis/Forest Sciences-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAraucaria angustifolia-
Palavras-chave: dc.subjectConiferous-
Palavras-chave: dc.subjectGenetic conservation-
Palavras-chave: dc.subjectGymnosperm-
Palavras-chave: dc.subjectQuantitative genetics-
Palavras-chave: dc.subjectTree breeding-
Título: dc.titleEnhancing genetic fitness while maintaining genetic variability in araucaria angustifolia-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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