Genetic parameters estimation in common bean under weed plant competition

ABSTRACT The present study aimed to estimate genetic parameters of 20 common bean genotypes, commercial and regional bean on weed interference. The agronomic characters analyzed were: average stem diameter (ASD); average plant length (APL); number of pods per pot (NPP); number of locules per pod (NLP); number of grains per pod (NGP); percentage of empty locules (% EL); total grains per pot (TGP); total grain weight per pot (TGW) and average grain weight (AGW). High heritability values were found for most of the characters studied, except for NGP and EL; in addition to great genetic variability among genotypes. Therefore, for most of the characteristics of agronomic interest studied, simple selection methods can be applied with great potential to identify superior genotypes and consequent genetic progress in common bean breeding.

摘要 本研究旨在评估20个普通菜豆基因型（含商业化品种与地方品种）在杂草干扰条件下的遗传参数。本研究所分析的农艺性状包括：平均茎粗（average stem diameter, ASD）、平均株长（average plant length, APL）、每盆荚果数（number of pods per pot, NPP）、每荚室数（number of locules per pod, NLP）、每荚粒数（number of grains per pod, NGP）、空室百分率（percentage of empty locules, % EL）、每盆总粒数（total grains per pot, TGP）、每盆总粒重（total grain weight per pot, TGW）及平均粒重（average grain weight, AGW）。研究发现，除每荚粒数（NGP）与空室百分率（% EL）外，多数供试性状均具有较高的遗传力，且供试基因型间存在显著的遗传变异。因此，针对本研究中多数具备农艺应用价值的性状，可采用简单选择法筛选优良基因型，进而实现普通菜豆育种的遗传进展。