Correlation and Path Coefficient Analysis for Yield Contributing and Quality Traits in Quality Protein Maize (Zea mays L.)

Abstract

Studies on genetic variability parameters were carried out in Quality Protein Maize (QPM) genotypes at AICRP on maize Rajasthan College of Agriculture, MPUAT, Udaipur, Rajasthan and in kharif 2014 for 15 various traits like days to 50 per cent tasseling, days to 50 per cent silking, anthesis silking interval, days to 75 per cent brown husk, plant height, ear height, ear length, 100-grain weight, grain yield per plant, harvest index, oil content, starch content, protein content, tryptophan content and lysine content in QPM genotypes. The experimental material consisting of 18 lines and 4 standard checks viz., Pratap QPM hybrid-1, Vivek QPM-9, HQPM-1 and HQPM-5 was raised in randomized block design in three replications. In the present investigation significant differences between the test entries were observed for all the yield and yield contributing traits and quality parameters. The grain yield per plant had highly significant and positive correlations both at genotypic and phenotypic levels with 100-grain weight (r g =0.863, r p =0.829), starch content (r g =0.657, r p =0.649), harvest index (r g =0.529, r p =0.504), lysine Content (r g =0.518, r p =0.486), ear length (r g =0.476, r p =0.463), tryptophan content (r g =0.468, r p =0.457) and ear height (r g =0.351, r p =0.339). The highest positive and direct effect was found for days to 50% tasseling (5.559) followed by lysine content (0.710) and starch content (0.439). The negative and direct effect was found for days to 50% silking (-5.774) and plant height (-0.331).

Correlation and Path Coefficient Analysis of Yield and Yield Components of Quality Protein Maize (Zea mays L.) Hybrids at Jimma, Western Ethiopia

“…is implies that higher ear height leads to increased grain yield; the genotypic correlation between ear height and grain yield (rg � 0.698; p ≤ 0.01) is predominately attributed to the direct effect (rg � 0.651; p ≤ 0.01) of ear height on the grain yield per hectare (Figure 1). Many research findings were in line with this finding [12,28,29]. Similarly, it is also in agreement with the findings of Asrarur-Rehman et al [23] and Bello et al [24].…”

Screening of suitable genotype for Bangladesh conditions based on genetic variability and path analysis in F2 white maize populations

“…Kumar et al. (2017) studied the analysis of pathways in quality protein maize (QPM) genotypes with 18 lines and four standard checks. They observed that days to 50% tasseling (5.559), lysine content (0.710), and starch content (0.439) were the most beneficial and direct effects.…”

“…In maize improvement program, developing appropriate inbred lines is a fundamental breeding approach. The maize inbred lines are generally developed in the process of recurrent selection of appropriate lines from the segregated populations followed by self‐fertilization of the selected lines (Ojo, Omikunle, Oduwaye, Ajala, & Ogunbayo, 2006). The success of this breeding depends mainly on the selection of promising lines from the early segregating generations.…”

Analise de trilha da massa da espiga de milho e seus atributos físicos

“…Para Sukumar et al (2019) o milho é um alimento que é encontrado em todo o mundo, sendo usado para consumo pelo homem, além de ser largamente empregado em diversas áreas, que vai desde a fabricação de etanol, produção de amido para culinária, produção de xarope, até nas fabricações de rações para bovinos e suínos, por apresentar grandes teores de nutrientes.…”