IAC 1849 Polaco: carioca common bean cultivar with an early maturity and tolerance to seed darkening

Chiorato, Alisson Fernando; Carbonell, Sérgio Augusto Morais; Bezerra, Luiza Maria Capanema; Esteves, José Antônio de Fátima; Gonçalves, João Guilherme Ribeiro; Silva, Daiana Alves da; Rovaris, Sara Regina Silvestrin; Spitti, Acácia Mecejana Diniz Souza; Benchimol-Reis, Luciana Lasry; Carvalho, Cássia Regina Limonta; Barros, Vera Lúcia Nishijima Paes de; Freitas, Rogério Soares de; Ticelli, Marcelo; Gallo, Paulo Boller

doi:10.1590/1984-70332020v20n3c40

Cited by 3 publications

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“…However, carioca beans, unlike other varieties, are devalued not only through darkening over time, but those that have low seed coat lightness (i.e., darker beans) at harvest time are devalued for the producer for the same reason mentioned above [28,32]. Therefore, Brazilian bean breeding programs have concentrated not only on developing carioca bean cultivars with tolerance to PHD, but those with the lightest colored grain possible [16], cultivars such as BRSMG-Madrepérola [33] and IAC-Polaco [34].…”

Section: Discussionmentioning

confidence: 99%

Genome-wide association mapping reveals new loci associated with light-colored seed coat at harvest and slow darkening in carioca beans

et al. 2021

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Background Common bean (Phaseolus vulgaris L.) is a legume whose grain can be stored for months, a common practice among Brazilian growers. Over time, seed coats become darker and harder to cook, traits that are undesirable to consumers, who associate darker-colored beans with greater age. Like commercial pinto and cranberry bean varieties, carioca beans that have darker seeds at harvest time and after storage are subject to decreased market values. Results The goal of our study was to identify the genetic control associated with lightness of seed coat color at harvest (HL) and with tolerance to post-harvest seed coat darkening (PHD) by a genome-wide association study. For that purpose, a carioca diversity panel previously validated for association mapping studies was used with 138 genotypes and 1,516 high-quality SNPs. The panel was evaluated in two environments using a colorimeter and the CIELAB scale. Shelf storage for 30 days had the most expressive results and the L* (luminosity) parameter led to the greatest discrimination of genotypes. Three QTL were identified for HL, two on chromosome Pv04 and one on Pv10. Regarding PHD, results showed that genetic control differs for L* after 30 days and for the ΔL* (final L*—initial L*); only ΔL* was able to properly express the PHD trait. Four phenotypic classes were proposed, and five QTL were identified through six significant SNPs. Conclusions Lightness of seed coat color at harvest showed an oligogenic inheritance corroborated by moderate broad-sense heritability and high genotypic correlation among the experiments. Only three QTL were significant for this trait – two were mapped on Pv04 and one on Pv10. Considering the ΔL, six QTL were mapped on four different chromosomes for PHD. The same HL QTL at the beginning of Pv10 was also associated with ΔL* and could be used as a tool in marker-assisted selection. Several candidate genes were identified and may be useful to accelerate the genetic breeding process.

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Section: Discussionmentioning

confidence: 99%

Genome-wide association mapping reveals new loci associated with light-colored seed coat at harvest and slow darkening in carioca beans

et al. 2021

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Genetic diversity and inter-gene pool introgression of Mesoamerican Diversity Panel in common beans

et al. 2021

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Caracterização morfoagronômica de genótipos de feijoeiro comum quanto à precocidade

Rodrigues

Oliveira

et al. 2021

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O feijoeiro comum é uma cultura de grande importância alimentar, econômica e social, em termos de produção e consumo, é uma leguminosa herbácea, com ciclo em torno de 95 dias, a maioria das cultivares utilizadas para o cultivo no mercado brasileiro expressa grande variabilidade genéticas quanto ao início de florescimento e a duração total do ciclo. Diante disso, objetivou-se com este trabalho avaliar a caracterização morfoagronômica de genótipos de feijoeiro comum quanto à precocidade de cultivo. O experimento foi conduzido na EMAPER, no município de Cáceres-MT, adotando o delineamento experimental em blocos ao acaso com três repetições, avaliando 58 genótipos de feijão comum. As parcelas foram compostas por quatro linhas de 4 m, com espaçamento de 0,5 m entre linhas. As características avaliadas foram o número de dias para o florescimento e ciclo de cultivo, os dados foram submetidos à análise de variância e a comparação das medias pelo teste de agrupamento Scott-Knott a 1% de probabilidade. A divergência genética foi estimada método de otimização de Tocher e hierárquico UPGMA, baseada na Distância Generalizada de Mahalanobis utilizando o programa computacional GENES. Pode-se concluir que existe variabilidade genética entre os genótipos de feijão comum avaliados, e os genótipos 3 (BG-UNEMAT-11) e 57 (TB 02-23) apresentaram menor número de dias para florescimento (31 dias) e menor ciclo da cultura (73 a 82 dias), sendo os mais indicados para programas de melhoramento genético visando precocidade.

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IAC 1849 Polaco: carioca common bean cultivar with an early maturity and tolerance to seed darkening

Cited by 3 publications

References 4 publications

Genome-wide association mapping reveals new loci associated with light-colored seed coat at harvest and slow darkening in carioca beans

Genome-wide association mapping reveals new loci associated with light-colored seed coat at harvest and slow darkening in carioca beans

Genetic diversity and inter-gene pool introgression of Mesoamerican Diversity Panel in common beans

Caracterização morfoagronômica de genótipos de feijoeiro comum quanto à precocidade

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