Canonical interrelationships in morphological characters, yield and nutritional components of corn

Abstract

The increase in the world population, the need to increase food production, both in quantity and quality, becomes increasingly prominent. The objective of this work was to identify the canonical correlations between yield components, morphological characters, micronutrients, bioactive compounds and amino acids in corn. The experimental design used was a randomized block containing 11 treatments arranged in three replications. The treatments consisted of 11 Top Crosses hybrid genotypes, these being made through crosses directed between a narrow genetic base tester hybrid for specific combining ability with 11 S5 inbred lines. It is inferred that groups considered yield components, secondary traits, bioactive compounds, micronutrients and amino acids are dependent. Promising characters are identified for the corn breeding for high yields, nutritional and energetic quality of corn grains. The indirect selection of grains with additions in essential amino acids can be directed to plants with superiority in height, mass and width of grains, phenols, flavonoids, soluble solids and zinc content.

Correlations between morpho-agronomic characters of soybean supplemented via leaf with micronutrients

“…Correa and Gonçalves, (2012), observed that the first two canonical variables explain more than 80% of the total variation contained in the original data set (97.94% of the accumulated total variance). Canonical correlations allow the realization of the correlation between groups of variables of interest (Carvalho et al, 2021). So agronomic and physiological characteristics were significant (P≤0.01, chi-square test) in the first and second canonical pairs, showing dependent relationships between the two groups of characteristics, with total correlations of these pairs of factors considered high (r = 0.99 and r = 0.90), respectively (Table 3).…”

Maize genetic breeding for tolerance to abiotic stress with focus on sustainable use of environmental resources

“…Conventionally, breeders develop maize populations tolerant to abiotic stress through recurrent selection, and extract experimental cultivars or inbred lines to produce hybrids (Hallauer, Carena & Miranda, 2010;Carvalho et al, 2022). Recurrent selection, with the accumulation of favorable alleles, may be one of the main current and future strategies to increase the genetic base of genotypes and identify those with greater tolerance to abiotic stress (Das et al, 2021).…”

“…Grain yield has been the main character used to identify genotypes adapted to abiotic stress conditions (Ertiro et al, 2017;Ndlovu et al, 2022). However, due to the lower genetic contribution in the expression of this character, selection based on secondary characters has become efficient (Carvalho et al, 2022). Mainly for adaptation to environments with stress caused by meteorological variables, the interval between male and female flowering has been the main secondary character used (Lima et al, 2022;Zaidi et al, 2022).…”

Agronomic Performance of Linseed as a Function of Plant Arrangement

“…The estimation of these coefficients for traits of interest to genetic improvement facilitates identification of promising genotypes, where it becomes possible to use their results for indirect selection (Carvalho et al, 2015). Linear relationship studies are currently applied in soybean (Loro et al, 2021a), corn (Carvalho et al 2021), wheat (Loro et al, 2021b) andoat (Verdi et al, 2019), providing relevant information for indirect selection. However, there is still little information in this area, addressing the linseed crop.…”