Morphological traits and yield in common bean

Autores

  • Cleber Morais Guimarães Embrapa Arroz e Feijão
  • Luís Fernando Stone Embrapa Arroz e Feijão http://orcid.org/0000-0003-3089-6381
  • Leonardo Cunha Melo Embrapa Arroz e Feijão
  • Mônica Ferreira de Melo Instituto Federal Goiano, Campus Ceres
  • José Ângelo Vitorino da Silva Centro Universitário Uni-Anhanguera
  • Raquel Silva Sousa Centro Universitário Uni-Anhanguera
  • Rogério Pereira de Moraes Centro Universitário Uni-Anhanguera

DOI:

https://doi.org/10.15361/1984-5529.2021v49n1p27-35

Resumo

It is necessary to explore the relationship between yield-related traits to define the appropriate selection procedures to improve bean yield. The relationships between yield and its components have been extensively investigated by common bean breeding programs. However, less attention has been given to morphological and physiological traits. This study evaluates the effects of morphological traits of bean plants on their yield. Forty-one carioca genotypes were evaluated in a randomized block design with three replicates. The abscission of flowers, flower buds, and newly formed pods was monitored and specific leaf mass, leaflet area, average length and thick­ness of racemes and peduncles, 100-grain weight, number of pods per plant, and yield were determined. Yield responded negatively to increases in raceme and peduncle length and number of pods per plant and positively to increases in peduncle thickness and grain weight. Genotypes differed regarding yield and grain weight and were divided into two groups by the Scott-Knott’s test considering yield. The most productive group showed increased abscission of flowers and newly formed pods, decreased number of pods, and increased grain weight. The most productive genotypes were those that remobilized photoassimilates more easily for having shorter racemes and peduncles, thicker peduncles, and decreased expenditure of structural carbohydrates with malformed pods and other structures required for conditioning grains in the plant, compensating with greater grain weight.

Biografia do Autor

Cleber Morais Guimarães, Embrapa Arroz e Feijão

Laboratório de Análise Agroambiental

Fisiologia Vegetal

Luís Fernando Stone, Embrapa Arroz e Feijão

Laboratório de Análise Agroambiental

Física de Solos, Irrigação e Drenagem

Leonardo Cunha Melo, Embrapa Arroz e Feijão

Laboratório de Melhoramento

Melhoramento Vegetal

Mônica Ferreira de Melo, Instituto Federal Goiano, Campus Ceres

Engenheira Agrônoma

José Ângelo Vitorino da Silva, Centro Universitário Uni-Anhanguera

Engenheiro Agrônomo

Raquel Silva Sousa, Centro Universitário Uni-Anhanguera

Engenheira Agrônoma

Rogério Pereira de Moraes, Centro Universitário Uni-Anhanguera

Biólogo

Publicado

25/03/2021

Edição

Seção

Fitotecnia - Crop Production