GYT Biplot Analysis: A New Approach for Cowpea Line Selection

Abstract

Cowpea beans is grown under different edaphoclimatic conditions throughout Brazilian regions causing them to perform differently due to the influence that environments have on genotypes. Thus, it is necessary to obtain lines adapted to the specific cultivation environments so that it can present high yield. The objective of this work was to select cowpea lines through the GYT biplot multivariate analysis. The experiment was carried out in Bom Jesus de Itabapoana, Rio de Janeiro State, Brazil, in the 2016 and 2017 harvests. The randomized block design was performed with four replications and four lines per plot. Variance analyzes and biplot plots were applied for the number of days of flowering, final planting, harvest value, housing, pod yield, length, average number of beans per pod, average grain weight per pod and grain weight. The analysis of variance showed that there is genetic variability among the strains, requiring a detailed study to select those with the best agronomic performance. The first two major components of the biplot chart explained almost all of the variation between strains. All yield characteristics were negatively correlated with the set of productivity combinations with housing and number of days for flowering. Lines 3, 10, 4, 2, 6, 12, 7 and 11 showed better average performance for yield characteristics.

Selfing revealed positive values than backcrossing for yield and yield enhancing traits among tomato segregating populations generated from Solanum lycopersicum × S. pimpinellifolium crosses under tropical humid climate

“…Relationship among yield*trait biplot view is not considered as the best to check trait profiles of the genotypes (Yan and Frégeau-Reid 2018). However, becoming aware of the interrelationships among the yield*trait combinations make it easier to take a well informed decision on any genetic material for breeding programs, aimed at selecting trait of interest for improvement (Mendonça et al 2018;De Oliveira et al 2019;Kendal 2019).…”

“…'pop_4_W/D2' together with 'pop_5_W/T1' having taken the longest time to achieve the initial and 100% fruit spoilage proved to possess more gene for fruit firmness from the wild parent 'LA2093' among the other populations. The polygon view of genotype by yield*trait (GYT) biplot has recently been used to study yield*trait combination profiles of genotypes, genotype evaluation and selection for improvement in several crop species including oat (Yan and Frégeau-Reid, 2018;Yan et al 2019), sesame (Boureima and Yaou 2019), durum wheat (Mohammadi 2019; Kendal 2019), cowpea (De Oliveira et al 2019;Araújo et al 2021), peanut (Mahmoud et al 2020, cotton (Peixoto et al 2022), and Jatropha curcas (Purwati et al 2022).…”

A Systematic Narration of Some Key Concepts and Procedures in Plant Breeding

“…The GYT biplot approach has been adopted in multi-trait selection for various crops (Boureima and Abdoua, 2019 ; de Oliveira et al, 2019 ; Hamid et al, 2019 ; Mohammadi, 2019 ; Gouveia et al, 2020 ; Mahmoud et al, 2020 ; Merrick et al, 2020 ; Badu-Apraku et al, 2021 ; Sofi et al, 2021 ; Tsenov et al, 2021 ; Xu et al, 2021 ).…”