Componentes da Fibra de Cultivares de Algodoeiro Herbáceo sob Lâminas de Água

Araújo, W. P.; Pereira, J. R.; Almeida, E. S. A. B. de; Araujo, Victor Lima; Lima, Franciezer Vicente de; Sobrinho, Francisco P. Cordão

doi:10.12722/0101-756x.v28n01a13

Cited by 7 publications

(7 citation statements)

References 2 publications

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“…The results obtained are similar to those obtained in other studies of cotton crop (Freitas et al, 2007;Silva et al, 2011;Martins et al, 2012;Araújo et al, 2013;Jerônimo et al, 2014;Carvalho et al, 2015a,b). Table 1.…”

Section: Resultssupporting

confidence: 91%

Correlations and path analysis among agronomic and technological traits of upland cotton

et al. 2016

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ABSTRACT. To date, path analysis has been used with the aim of breeding different cultures. However, for cotton, there have been few studies using this analysis, and all of these have used fiber productivity as the primary dependent variable. Therefore, the aim of the present study was to identify agronomic and technological properties that can be used as criteria for direct and indirect phenotypes in selecting cotton genotypes with better fibers. We evaluated 16 upland cotton genotypes in eight trials conducted during the harvest 2008/2009 in the State of Mato Grosso, using a randomized block design with four replicates. The evaluated traits were: plant height, average boll weight, percentage of fiber, cotton seed yield, fiber length, uniformity of fiber, short fiber index, fiber strength, elongation, maturity of the fibers, micronaire, reflectance, and the degree of yellowing. Phenotypic correlations between the traits and cotton fiber yield (main dependent variable) 2 F.J.C. Farias et al. Genetics and Molecular Research 15 (3): gmr.15038239 were unfolded in direct and indirect effects through path analysis. Fiber strength, uniformity of fiber, and reflectance were found to influence fiber length, and therefore, these traits are recommended for both direct and indirect selection of cotton genotypes.

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Section: Resultssupporting

confidence: 91%

Correlations and path analysis among agronomic and technological traits of upland cotton

et al. 2016

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“…Thus, for each significant trait there is at least a contrast between averages different from zero, revealing the cultivars potential for genetic diversity studies. The coefficients of variation were lower than 20% for all traits, similar to those obtained in other studies with the cotton crop (Freitas et al, 2007;Araújo et al, 2013;Carvalho et al, 2015a,b).…”

Section: Joint Analysis Of Variance and Cultivar Performancesupporting

confidence: 89%

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

Santos

Teodoro

Farias³

et al. 2017

Genet. Mol. Res.

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ABSTRACT. Using commercial cultivars to compose crossing blocks in cotton is a promising strategy, because these materials have desirable agronomic and technological characteristics. The objective of this study was to evaluate the genetic diversity among 16 cotton cultivars cultivated in two environments in the State of Mato Grosso, the largest national producer, using agronomical and technological traits. There was significant effect to cultivars for all traits, while genotype x environment interaction was significant only for average boll weight, short fiber index, and maturity of fibers. Therefore, because of the presence of genotype x environment interaction for three traits, we chose to study genetic diversity among cotton cultivars separately in each environment and investigate the interaction impact on the diversity among genotype pairs. Based on agronomical and technological performance and genetic diversity among cultivars in both environments, the most promising cross involves FM 910 and LD CV 02. We also observed that lint percentage and average boll weight presented a higher discrimination capacity in both environments.

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“…The means fiber length, fiber uniformity, fiber strength, fineness, fiber maturity, percentage of fibers, and short fiber index (Table 1) were similar to means previously obtained in other trials with cotton genotypes (Freitas et al, 2007;Araújo et al, 2013;Jerônimo et al, 2014;Carvalho et al, 2015a,b). This suggests suitability of this database for the proposed study, because it represents actual situations of field trials with cotton genotypes.…”

Section: Resultssupporting

confidence: 87%

Number of repetitions for evaluating technological traits in cotton genotypes

et al. 2016

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ABSTRACT. With the changes in spinning technology, technological cotton traits, such as fiber length, fiber uniformity, fiber strength, fineness, fiber maturity, percentage of fibers, and short fiber index, are of great importance for selecting cotton genotypes. However, for accurate discrimination of genotypes, it is important that these traits are evaluated with the best possible accuracy. The aim of this study was to determine the number of measurements (repetitions) needed to accurately assess technological traits of cotton genotypes. Seven experiments were conducted in four Brazilian States (Ceará, Rio Grande do Norte, Goiás, and Mato Grosso do Sul). We used nine brown and two white colored fiber lines in a randomized block design with four replications. After verifying the assumptions of residual normality and homogeneity of variances, analysis of variance was performed to estimate the repeatability coefficient and calculating the number of repetitions. Trials with four replications were found to be sufficient to identify superior cotton genotypes for all measured traits except short fiber index with a selective accuracy >90% and at least 81% accuracy in predicting their actual value. These results allow more accurate and reliable results in future researches with evaluating technological traits in cotton genotypes.

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Componentes da Fibra de Cultivares de Algodoeiro Herbáceo sob Lâminas de Água

Cited by 7 publications

References 2 publications

Correlations and path analysis among agronomic and technological traits of upland cotton

Correlations and path analysis among agronomic and technological traits of upland cotton

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

Number of repetitions for evaluating technological traits in cotton genotypes

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