Morpho-agronomic traits in Phaseolus lunatus L.: systematic review and meta-analysis as a tool in genotype selection

Abstract

This study estimated the mean values of morpho-agronomic traits of Phaseolus lunatus L. through a systematic review and meta-analysis. Seven studies were selected through the systematic review, which encompassed a total of 104 genotypes. The selected traits were pod length and width, number of seeds per pod, grain yield, and 100-seed weight. In the exploratory analysis, normality, descriptive parameters, box-plot graph, and quantile-quantile plot of the data were evaluated. In the meta-analysis, the Q test and I² statistic were applied, and then, the combined effect model and fixed effect model were tested, using the Genes and R software. The data showed a normal distribution, and the box-plot graph indicated the need to remove some outliers. The quantile-quantile plot showed no publication bias. Q values were high for most traits, indicating that the studies were not homogeneous, and the random effects model was adopted. The combined estimates of pod length, width, number of seeds, grain yield, and 100-seed weight were 69.80mm, 16.29mm, 2.69, 395.97kg/ha, and 48.61g, respectively. The values obtained were precise, due to their similarity with the mean values, indicating that the methodology is adequate for generating mean values of agronomic interest.