Relations among phenotypic traits of soybean pods and growth habit

Abstract

This study aims to identify the phenotypic effects of traits associated with soybean pods and their growth habit. The experiments were carried out during the 2012 -2013 agricultural year. It was done in randomized blocks arranged in a 2×20 factorial design (environments × soybean cultivars) with three replications. Data were subjected to individual analysis of variance for each environment and growth habit to verify the homogeneity of variances. Phenotypic path analysis among agronomic traits was performed for each environment within the soybean growth habits. The results showed considerable influences of growth habit via traits associated with soybean pods. The traits number of pods with two, three, and four grains directly influenced the grain yield of genotypes with indeterminate growth habit regardless of the environment. The soybean genotypes with determinate growth habit contributed greatly to grain yield through the traits number of pods with one, two, and three grains and thousand grain weight via pods with two or four grains. Indirect selection of superior genotypes for pods per plant and grain weight could provide satisfactory results for soybean yield in relation to the growth habit. The interrelationships obtained between growth habits and environments, can be applied to superior genotypes selection strategies in breeding soybean programs.

Macronutrients and Micronutrients Variability in Soybean Seeds

“…Studies regarding seeds chemical composition are of practical interest for seed technology, since their physiological quality is characterized by influence seedlings initial development, biological nitrogen fixation in leguminous, and consequently the establishment of their initial stand in the field, as nutrient deficiency may lead to disorganization of initial metabolic processes up to grain yield (Coelho et al, 2002;Carvalho et al, 2017). The objectives of this work was to evaluate the chemical composition of the macronutrients: nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) and sulfur (S), and micronutrients: boron (Cu), iron (Fe), manganese (Mn), molybdenum (Mo) and zinc (Zn), and the elements aluminum (Al) and sodium (Na) measured in soybean seeds from different producing regions of Brazil.…”

Association Analysis over Different Environments in Soybean [Glycine max (L.) Merrill]

“…Concomitant results were reported by Iqbal et al, (2003), Mukesh and Singh (2009), Arshad et al, (2014) and Ivan et al, (2017). Hundred seed weight showed moderate direct effect on the single plant yield.…”

Chemical composition and initial growth of soybean seedlings under flooding conditionat R5 growth stage

“…Changes in the protein levels in the shoot of soybean seedlings indicate that the highest protein production is related to the tolerance to stress in hypox soil conditions (Shingaki-Wells et al, 2011;Perata et al, 2011;Pedó et al, 2016;Carvalho et al, 2017). Carbohydrate supply and regulation of carbohydrate and energy metabolism are important in overcoming hypoxic stress (Andreev et al, 1991;Kumutha et al, 2008) leading many plants to the accumulation of amino acids (Fan et al, 1988).…”