Estimates of Genetic Parameters for Selection of Colored Cotton Fiber1

Globally, the demand for food and consumer products has accompanied population growth, forcing the agriculture and livestock sector to optimize the production systems. In the specific case of agriculture, using improved edible and energetic plant cultivars associated with abiotic stress-reducing substances is a strategy adopted to solve this problem. This investigation aimed to evaluate whether silicon (Si) promotes physiological adjustments, an increase in production, higher yield, and improved quality of naturally colored cotton fibers. Five doses of silicon (0 (control), 5, 10, 15, and 20 kg ha−1) were tested in a completely randomized design. The variables assessed were physiological adjustments, production, yield and quality of fibers produced by BRS Rubi cultivar. Data were submitted to principal component analysis, multivariate and univariate analyses of variance, and multiple linear regression analysis. Silicon promotes physiological adjustments, enhanced production, yield, and quality of naturally colored cotton fibers of BRS Rubi cultivar grown in the Brazilian semiarid region. Fiber quality in plants that have been treated with Si is within the expected values for this cultivar and by the international standard D-4605 of the American Society for Testing and Materials. 10 kg ha−1 of Si is recommended to increase fiber quality of naturally colored cotton cv. BRS Rubi.

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Prospects of the Remote Hybridization on Improvement of the Main Economical Traits of Cotton Genotypes With Naturally Colored Fibre

Mammadova

Huseynova

Abdulaliyeva

et al. 2021

EESA

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Due to the insufficient quality of varieties with naturally colored fiber, their cultivation on a global scale is limited. For the first time in Azerbaijan, an attempt was made to investigate the possibility of improving the qualitative and economic traits in genotypes with brown fiber. For this, distant hybridization was carried out between tetraploid cultivars of the G. hirsutum L. (white fiber) and artificially obtained amphidiploids with a doubled set of chromosomes from the diploid specie G. arboreum L. (brown fiber), from the local Genbank. On this basis, during 2017-2019, distant hybrids with colored fiber and contrasting quality and productivity potential were studied in detail and identified. Qualitative traits such as micronair (Mic), strength (Str), and Uniformity Index (UI) were found to be comparable to the best parent with white fiber in hybrids with colored fibers, but the Upper Half Mean Length (UHML) still to be improved. The "number of bolls per plant" makes the maximum positive contribution to the total cotton yield. According to the results of the averaged data of two generations (F1 and F2), a change in the degree and direction of correlations between the studied characters, depending on the intensity of the fiber color, was noted.

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Estimates of Genetic Parameters for Selection of Colored Cotton Fiber1

Cited by 5 publications

References 15 publications

Using combining ability as a strategy of upland cotton selection for high fiber quality

Using combining ability as a strategy of upland cotton selection for high fiber quality

Physiological Adjustments, Yield Increase and Fiber Quality of 'Brs Rubi' Naturally Colored Cotton Under Silicon Doses

Prospects of the Remote Hybridization on Improvement of the Main Economical Traits of Cotton Genotypes With Naturally Colored Fibre

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