Data/hora: 21/06/2024 00:33:48

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 2
Data corrente: | 27/06/2023
Data da última atualização: | 27/06/2023
Autoria: | CARVALHO, R. R. B. DE; SOUSA, M. B. E; OLIVEIRA, L. A. de; OLIVEIRA, E. J. de.
Afiliação: | RAVENA ROCHA BESSA DE CARVALHO, UNIVERSIDADE FEDERAL DO RECÔNCAVO DA BAHIA; MASSAINE BANDEIRA E SOUSA; LUCIANA ALVES DE OLIVEIRA, CNPMF; EDER JORGE DE OLIVEIRA, CNPMF.
Título: | Phenotypic diversity and selection in biofortifed cassava germplasm for yield and quality root traits.
Ano de publicação: | 2022
Fonte/Imprenta: | Euphytica,v. 218, n.173, 2022.
DOI: | https://doi.org/10.1007/s10681-022-03125-6
Idioma: | Português
Conteúdo: | Abstract: Increasing carotenoid content and improving other root quality traits has been the focus of cassava biofortification. This study aimed to (i) evaluate the genetic variability for total carotenoid content (TCC), as well as for root yield and root quality attributes; (ii) estimate potentially useful correlations for selection; and (iii) select parents for breeding and estimate the genetic gain. Data from 2011 to 2020 of 265 cassava genotypes with cream and yellow roots were analyzed for dry matter content (DMC), shoot yield, fresh root yield (FRY), dry root yield (DRY), harvest index, average number of roots per plant, starch content, root pulp color, cyanogenic compounds, and TCC. The best linear unbiased predictions showed great phenotypic variation for all traits. Six distinct groups were formed for productive characteristics of root quality, mainly TCC, DMC and FRY. Only TCC showed high broad-sense heritability ( h2 = 0.72), while the other traits had low to medium magnitude (0.21 ? h 2 ? 0.60). TCC was strongly correlated with pulp color (r = 0.70), but null significance for DMC. The network analysis identified a clear separation between the agronomic and quality attributes of cassava roots. The selection of the 30 genotypes for recombination in the breeding program has the potential to raise TCC by 27.05% and reduce the cyanogenic compounds content by 23.03%, in addition to increasing FRY and DRY by 22.72% and 22.95%, respectively. This is the first consolidated study on the potential of germplasm for the development biofortified cassava cultivars in Brazil.
Thesagro: | Banco de Germoplasma; Carotenóide; Mandioca; Raiz.
Thesaurus Nal: | Carotenoids; Cassava; Germplasm conservation; Manihot; Roots.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (33802-1) - UPC - AP - DD - Publicação digital -  -  - DIS