Communications in Plant Sciences, vol 7, issue 12, p.27-33, 2017 (2017005)
Full title: Path analysis and traits correlation in soybean
Authors: Fabiano Faria Bisinotto, Osvaldo Toshiuki Hamawaki, Ana Paula Oliveira Nogueira, Raphael Lemes Hamawaki, Jacqueline Siqueira Glansenapp, and Cristiane Lemes Hamawaki
Abstract: This work aimed to study agronomic traits of soybean genotypes by path analysis and correlation estimates. We have used a randomized complete block design to assess 35 soybean genotypes with three replications, which 31 lines were from the breeding program of the Federal University of Uberlândia, Brazil, plus four commercial cultivars. We have assessed features number of days to the blooming, plant height at blooming, number of days to maturity, plant height at maturity, first pod height, number of nodes on the main stem at maturity, number of pods with one, two and three seeds per plant, total number of pods per plant, number of seeds per pod and grain yield. The features plant height at maturity and number of nodes at maturity have presented significant correlations phenotypic and genotypic positive. 100-seed weight was positively correlated with grain yield shown high direct phenotypic and genotypic effects being, therefore, useful for indirect selection aiming the grain yield increase.
The approaches correlation and path analysis of agronomic traits of major importance in soybean lines are efficient in assessing interconnections between yield and other agronomic traits in soybean. The features plant height at maturity and number of nodes are positively correlated. 100-seed weight is positively correlated to grain yield, and correlations between the number of days to the blooming and average weight of 100 seeds are negative.
Keywords: Glycine max, Grain yield, Agronomic traits.