Agronomic and technical fibers traits in elite genotypes of cotton herbaceous

Abstract

The changes in weaving technology, competition with synthetic fibers, and the globalization of cotton and textile production have increased the demand for better quality fibers. One of the main traits to be improved is fiber length. Thus, under the hypothesis of distinction and characterization of cotton genotypes, the aim of this study was to evaluate, in three locations, the average behavior of elite breeding lines selected for long fiber, as the agronomic and fiber technological trait. It were evaluated lines derived from a cross between the Guazuncho2 of Gossypium hirsutum L. with Acala SJ4 materials of fiber long in three trials located in Apodi-RN in 2013 and 2014 and Santa Helena-GO in 2013. The experimental design was a randomized complete block with two replications. The following traits were evaluated: plant height, average boll weight, percentage of fiber, cotton productivity in seed, fiber length, fiber uniformity, short fiber index, fiber strength, elongation, maturity of the fibers, micronaire, reflectance and the degree of yellowing. The genotypes; Centro Nacional de Pesquisa de Algodão (CNPA) 2012 to 55 and CNPA 2012 to 58 gather high yield and desired fiber characteristics.

<b>Interrelations between agronomic and technological fiber traits in upland cotton

“…The F test revealed a significant relationship (p < 0.05) between cotton genotypes for all agronomic (Table 1) and technological (Table 2) traits, which allowed for the inference of existing genetic variability between genotypes (Table 1). The coefficient of variation was inferior to 20% of all the evaluated traits, as it was similar to those obtained in published papers studying cotton (Freitas, Leandro, & Carvalho, 2007;Araújo et al, 2013;Jerônimo et al, 2014;Carvalho et al, 2015a, Carvalho, Farias, Morello, Rodrigues, & Teodoro, 2015bCarvalho, Farias, Morello, & Teodoro, 2016a, Carvalho, Farias, Morello, & Teodoro, 2016bQueiroz et al, 2017a;Santos et al, 2017). No significant G x E interaction was observed for the evaluated traits, which indicates similar phenotypic performance for the traits in these three environments.…”

Genetic diversity among cotton cultivars in two environments in the State of Mato Grosso

“…Similar results were observed by Carvalho et al (2015b), when evaluating 36 cotton elite inbred lines in three environments did not observed GxE interaction for all agronomical and technological traits evaluated. Because of the presence of GxE interaction for three traits, we chose to study the genetic diversity among cotton cultivars separately in each environment and investigate the interaction impact on the diversity among genotype pairs.…”

Usefulness of the HMRPGV method for simultaneous selection of upland cotton genotypes with greater fiber length and high yield stability

“…These values are lower than those observed in other studies on cotton crop (Souza et al, 2006;Suinaga et al, 2006;Hoogerheide et al, 2007;Silva Filho et al, 2008;Moiana et al, 2014;Carvalho et al, 2015a). According to Cruz et al (2014), for continuously distributed phenotypic traits, CV e values lower than 20% reflect excellent experimental accuracy.…”