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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
10/01/2025 |
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Data da última atualização: |
10/01/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, G. R. da; SOUSA, V. A. de; GUEDES, F. L.; DINIZ, F. M. |
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Afiliação: |
GEICE RIBEIRO DA SILVA; VITOR AQUINO DE SOUSA; FERNANDO LISBOA GUEDES, CNPC; FABIO MENDONCA DINIZ, CNPC. |
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Título: |
Genetic diversity and association analysis of ISSR markers with forage production traits in pigeonpea. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Genetic Resources and Crop Evolution, v. 71, n. 8, Dec. 2024. |
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DOI: |
https://doi.org/10.1007/s10722-024-02304-9 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Pigeonpea (Cajanus cajan) has gained worldwide attention among forage legumes due to its important role in animal nutrition, as well as its resilience to drought and high temperatures, making it particularly valuable in the semiarid region of Brazil. However, its sensitivity to photoperiodism has driven breeding programs to develop cultivars that are insensitive to this condition. In this study, we evaluated the genetic diversity and structural genetic profile of F4 generation pigeonpea accessions and explored the association of inter-simple sequence repeat (ISSR) markers with forage production traits under neutral photoperiod. Mixed linear models were used in order to control confounding factors and reduce errors. Markers successfully distinguished between genotypes, as shown by mean marker index and resolving power values of 1.57 and 2.86, respectively. Accessions displayed genetic diversity characteristic of their generation, with an effective number of alleles (Ne) of 1.23 and an average Shannon diversity index of 0.24. Bayesian analysis identified four genetic groupings contributing to the structure of the C. cajan collection, based on a posterior probability threshold of 0.7. Assuming significant effect, P-value < 0.05, 14 loci were associated with growth rate after 40 days (GR), height after flowering (HF), days to flowering (DF), total dry forage mass productivity (FP), and pod productivity (PP). After adjusting for the false discovery rate, 16 markers were identified, six of which showed likely pleiotropic effects. A 1500-bp fragment from primer UBC-845 was associated with HF, DF, and PP. These markers proved useful for characterizing the pigeonpea collection and for identifying markers linked to forage production traits under neutral photoperiod conditions. MenosAbstract: Pigeonpea (Cajanus cajan) has gained worldwide attention among forage legumes due to its important role in animal nutrition, as well as its resilience to drought and high temperatures, making it particularly valuable in the semiarid region of Brazil. However, its sensitivity to photoperiodism has driven breeding programs to develop cultivars that are insensitive to this condition. In this study, we evaluated the genetic diversity and structural genetic profile of F4 generation pigeonpea accessions and explored the association of inter-simple sequence repeat (ISSR) markers with forage production traits under neutral photoperiod. Mixed linear models were used in order to control confounding factors and reduce errors. Markers successfully distinguished between genotypes, as shown by mean marker index and resolving power values of 1.57 and 2.86, respectively. Accessions displayed genetic diversity characteristic of their generation, with an effective number of alleles (Ne) of 1.23 and an average Shannon diversity index of 0.24. Bayesian analysis identified four genetic groupings contributing to the structure of the C. cajan collection, based on a posterior probability threshold of 0.7. Assuming significant effect, P-value < 0.05, 14 loci were associated with growth rate after 40 days (GR), height after flowering (HF), days to flowering (DF), total dry forage mass productivity (FP), and pod productivity (PP). After adjusting for the false discovery rate, 16 markers were... Mostrar Tudo |
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Palavras-Chave: |
Dominant markers; Feijão guandu; Genetic association; Genetic diversity; ISSR polymorphism; Molecular breeding. |
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Thesagro: |
Cajanus Cajan; Citogenética Vegetal; Genética Molecular; Guandu; Leguminosa Forrageira; Melhoramento Vegetal; Seleção Genética. |
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Thesaurus Nal: |
Brazil; Forage production; Genetic markers; Marker-assisted selection; Plant genetics; Semiarid zones. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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