Data/hora: 01/06/2024 22:41:17

Biblioteca(s): | Embrapa Milho e Sorgo.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 04/09/2014
Data da última atualização: | 23/05/2017
Autoria: | LEISER, W. L.; RATTUNDE, H. F.; WELTZIEN, E.; CISSE, N.; ABDOU, M.; DIALLO, A.; TOURÈ, A. O.; MAGALHAES, J. V.; HAUSSMANN, B. I. G.
Afiliação: | JURANDIR VIEIRA DE MAGALHAES, CNPMS.
Título: | Two in one sweep: aluminum tolerance and grain yield in P-limited soils are associated to the same genomic region in West African Sorghum.
Ano de publicação: | 2014
Fonte/Imprenta: | BMC Plant Biology, v. 14, n. 206, p. 1-13, 2014.
DOI: | 10.1186/s12870-014-0206-6
Idioma: | Inglês
Conteúdo: | Background: Sorghum (Sorghum bicolor L. Moench) productivity is severely impeded by low phosphorus (P) and aluminum (Al) toxic soils in sub-Saharan Africa and especially West Africa (WA). Improving productivity of this staple crop under these harsh conditions is crucial to improve food security and farmer’s incomes in WA. Results: This is the first study to examine the genetics underlying sorghum adaptation to phosphorus limitation in a wide range of WA growing conditions. A set of 187 diverse sorghum genotypes were grown in 29–P and + P field experiments from 2006-2012 in three WA countries. Sorghum grain yield performance under–Pand+P conditions was highly correlated (r = 0.85***). Significant genotype-by-phosphorus interaction was detected but with small magnitude compared to the genotype variance component. We observed high genetic diversity within our panel, with rapid linkage disequilibrium decay, confirming recent sequence based studies in sorghum. Using genome wide association mapping based on 220 934 SNPs we identified one genomic region on chromosome 3 that was highly associated to grain yield production. A major Al-tolerance gene in sorghum, SbMATE, was collocated in this region and SbMATE specific SNPs showed very high associations to grain yield production, especially under–P conditions, explaining up to 16% of the genotypic variance. Conclusion: The results suggest that SbMATE has a possible pleiotropic role in providing tolerance to two of the most serious abiotic stresses for sorghum in WA, Al toxicity and P deficiency. The identified SNPs can help accelerate breeding for increased sorghum productivity under unfavorable soil conditions and contribute to assuring food security in WA.
Palavras-Chave: | Melhoramento genético.
Thesagro: | Alumínio; Fósforo; Sorghum bicolor; Sorgo.
Categoria do assunto: | --
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (26146-1) - UPC - AP - DD -  -  -  - DIS