Qualidade da semente e fibra de algodão na caracterização do descaroçador de 25 serras

Jerônimo, J. F.; Almeida, Francisco de Assis Cardoso; Silva, Odilon R. R. F. da; Brandão, Ziany Neiva; Sofiatti, Valdinei; Gomes, Josivanda Palmeira

doi:10.1590/s1415-43662014000600015

Cited by 12 publications

(14 citation statements)

References 7 publications

(5 reference statements)

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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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“…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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“…As the trends observed for fiber length, the lowest percentages of short fibers (6.62%) were found in the genotype BRS Topázio, regardless of the salinity management strategies ( Figure 6). Cunha Neto et al (2015), analyzing the genetic divergence between progenitors of white fibers and colored fibers, also found lower SFI in the genotype BRS Topázio (9.74%), which is positive because the lower this index, the better the resistance and regularity of the threads, since they influence processes subsequent to fabric weaving, such as torsional resistance and yarn appearance (Jerônimo et al, 2014).…”

Section: Resultsmentioning

confidence: 94%

Growth and fiber quality of colored cotton under salinity management strategies

Soares

Fernandes

Lima

et al. 2018

Rev. bras. eng. agríc. ambient.

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A B S T R A C TUsing saline water in the agricultural activity has become a reality in several regions of the world. Due to the increase in the demand for fresh water, it is necessary to use cultivation strategies and genotypes tolerant to saline stress to make the production viable. In this context, effects of irrigation management strategies with low-salinity water (0.8 dS m -1 ) and high-salinity water (9.0 dS m -1 ) were evaluated, varying the phenological stages of the plants, on the growth and fiber quality of colored cotton. Three cotton cultivars submitted to seven irrigation management strategies were used, constituting a 3 x 7 factorial scheme, in a randomized block design with three replicates, in plots and in protected environment. Saline water irrigation in the vegetative and flowering stages can be used in cotton cultivation with the lowest losses of growth, phytomass accumulation and fiber quality. Saline water application during boll development is detrimental to the growth and quality of cotton fiber. The genotype BRS Topázio is tolerant to water salinity, with better fiber length, regardless of the development stage.Crescimento e qualidade da fibra do algodoeiro colorido sob estratégias de manejo da salinidade R E S U M O O uso de água salina na atividade agrícola vem se tornando uma realidade em diversas regiões do mundo, devido ao aumento na demanda de água doce, faz-se necessário o uso de estratégias de cultivo e genótipos tolerantes ao estresse salino que viabilizem a produção. Nesse contexto, objetivou-se avaliar neste estudo os efeitos de estratégias de manejo da irrigação com águas de baixa (0,8 dS m -1 ) e alta salinidade (9,0 dS m -1 ), variando as fases fenológicas das plantas, sobre o crescimento e qualidade de fibra de algodoeiros coloridos. Foram utilizados três cultivares de algodoeiro colorido submetidos a sete estratégias de manejo de irrigação, constituindo um fatorial 3 x 7, no delineamento de blocos casualizados e três repetições, com cultivo em vasos e em ambiente protegido. A irrigação com água salina nas fases vegetativa e de floração pode ser utilizada no cultivo do algodoeiro com as menores perdas no crescimento, acúmulo de fitomassa e qualidade de fibra. A aplicação da água salina na formação da produção foi prejudicial à qualidade de fibra do algodoeiro. O genótipo BRS Topázio obteve fibras de melhor qualidade sob irrigação com água de alta salinidade, quando comparado as demais cultivares estudadas.

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Qualidade da semente e fibra de algodão na caracterização do descaroçador de 25 serras

Cited by 12 publications

References 7 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

Number of repetitions for evaluating technological traits in cotton genotypes

Growth and fiber quality of colored cotton under salinity management strategies

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