Development and selection of super-sweet corn genotypes (sh2) through multivariate approaches

Abstract

The aim of the present study was to investigate relations among ten traits in super-sweet corn genotypes assessed by means of simple correlation, path and canonical variable analyses, as well as to investigate the relative importance of such traits to the supersweet corn breeding program developed at Darcy Ribeiro Northern Fluminense State University in order to develop strategies able to improve the efficiency in the selection of superior genotypes. Thus, trials comprising 3 × 6 partial diallel of super-sweet (sh2) corn were carried out, according to a randomized block design (RBD) with four repetitions, in two different environments located in Northern Rio de Janeiro State, Brazil (Itaocara and Campos dos Goytacazes counties). The correlation study showed that traits

Sweet Corn Research around the World 2015–2020

“…Goncalves et al [8] investigated the relative importance of agronomic traits in the supersweet corn developed in Brazil in order to develop strategies able to improve efficiency in selection of superior genotypes. Ear diameter and ear length had the highest contribution to ear yield.…”

Yield related key traits in the selection of super sweetcorn hybrids

“…On the other hand, the traits days to male flowing (MF); plant height (PH); ear height (EH); grain length (GL); grain width (GW); ear length (EL); ear diameter (ED); yield of dehusked ears (YDE); number of commercial ears (NCE); grain yield (GY); content of soluble solids (SS); and grain dry matter (DM) presented VIF and CI values below 10 and 100, respectively, and were kept for subsequent analyses (Table 1). Taylor and Whelan (2010) and Gonçalves et al (2018) also used multivariate techniques for traits related to the selection of sweet corn genotypes. The multivariate analysis allowed reducing the number of traits, as in the present study, increasing the chances of a more effective selection, since the use of fewer traits reduces the effect of their inter-relations, avoiding redundancy and misconception in the selection process of promising genotypes (Aaliya et al 2016).…”

“…The study and identification of different groups help both in determining future crosses and in verifying existing genetic variability, a fundamental criterion for the determination of key characters and, consequently, for the selection of promising genotypes (Gonçalves et al 2018;Hallauer et al 2010;Solomon et al 2011).…”

Adubação potássica em cobertura e a associação de nitrogênio com silicato de potássio na morfologia de plantas, incidência de carvão comum e produtividade de grãos de milho

“…Devido à ausência de correlação de rendimento de grãos com as demais características estudadas (Figuras 1 e 2), é possível afirmar que os efeitos ambientais foram análogos para ambos experimentos. Em relação às características que apresentaram correlação, aponta-se que plantas de milho de ciclo precoce atingem a maturidade reprodutiva em um intervalo de tempo menor e, logo, vão apresentar altos valores de correlação entre altura de planta/inserção de espiga (Gonçalves et al, 2018).…”