Association Analysis for Seed Cotton Yield and Fiber Quality Improvement in Intra Specific Crosses of Cotton (Gossypim hirsutum L.)

2017 ◽  
Vol 5 (2) ◽  
pp. 282-284
Author(s):  
Shiva Kumar ◽  
Keyword(s):  
Quality Improvement ◽  
Association Analysis ◽  
Fiber Quality ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Seed Cotton Yield

Growth Analysis of Cotton in Competition with Velvetleaf (Abutilon theophrasti)

2016 ◽  
Vol 30 (1) ◽  
pp. 123-136 ◽  
Author(s):  
Xiaoyan Ma ◽  
Jinyan Yang ◽  
Hanwen Wu ◽  
Weili Jiang ◽  
Yajie Ma ◽  
...  
Keyword(s):  
Field Experiments ◽  
Fiber Quality ◽  
Dry Weight ◽  
Growth And Yield ◽  
Effective Management ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Weed Density ◽  
Seed Cotton Yield ◽  
The Relationship

Field experiments were conducted in 2013 and 2014 to determine the influence of velvetleaf densities of 0, 0.125, 0.25, 0.5, 1, 2, 4, and 8 plants m−1of row on cotton growth and yield. The relationship between velvetleaf density and seed cotton yield was described by the hyperbolic decay regression model, which estimated that a density of 0.44 to 0.48 velvetleaf m−1of row would result in a seed cotton yield loss of 50%. Velvetleaf remained taller and thicker than cotton throughout the growing season. Both cotton height and stem diameter reduced with increasing velvetleaf density. Moreover, velvetleaf interference delayed cotton maturity, especially at velvetleaf densities of 1 to 8 plants m−1of row, and cotton boll number and weight, seed numbers per boll, and lint percentage were also reduced. Fiber quality was not influenced by weed density when analyzed over 2 yr; however, fiber length uniformity and micronaire were adversely affected in 2014. Velvetleaf intraspecific competition resulted in density-dependent effects on weed biomass, ranging from 97 to 204 g plant−1dry weight. Velvetleaf seed production per plant or per square meter was indicated by a logarithmic response. At a density of 1 plant m−1of cotton row, velvetleaf produced approximately 20,000 seeds m−2. The adverse impact of velvetleaf on cotton growth and development identified in this study have indicated the need for effective management of this species when the weed density is greater than 0.25 to 0.5 plant m−1of row and before the weed seed maturity.

scholarly journals IMPROVEMENT OF COTTON YIELD AND FIBER QUALITY PARAMETERS IN UPLAND COTTON (GOSSYPIUM HIRSUTUM L.) GENOTYPES THROUGH CHEMICAL MUTAGEN

2020 ◽  
Vol 36 (1) ◽  
pp. 8-12
Author(s):  
Z. A. Deho ◽  
S. Abro ◽  
M. Rizwan
Keyword(s):  
Plant Height ◽  
Fiber Length ◽  
Fiber Quality ◽  
Chemical Mutagen ◽  
Parental Line ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Higher Plant ◽  
Seed Cotton Yield ◽  
Mutant Lines

Eight mutant lines developed through mutation breeding technique using chemical mutagen along with parent line (Sadori) were evaluated at NIA, experimental farm. Quantitative and qualitative traits were analyzed statistically. The chemical mutagen Ethyle Methane Sulphonate (EMS) was used at the rate of 0.03%. The mutant lines (viz. NIA-M5, NIA-M10, NIA-M16, NIA-M20, NIA-M23, NIA-M29, NIA-M33 and NIA-M35) with parent Sadori were included in this study. The results revealed that three mutants (NIA-M20, NIA-M35 and NIA-M5) took (7.2%, 8.1% and 8.1%) higher plant height than parent (111 cm), two mutants (NIA-M5 and NIA-M20) obtained (36.8% and 42.1%) more sympodial branches plant-1 than parent (19.0). Three mutants (NIA-M20, NIA-M5 and NIA-M10) produced (16.8%, 22.4.0% and 25.4%) more number of bolls plant-1 than parental line (67.0). Five mutants (NIA-M5, NIA-M35, NIA-M20, NIA-M23 and NIA-M29) had higher fiber length (mm) (10.2%, 8%, 5.7%, 5% and 4.0%) as compared parent Sadori (28.0 mm). Two mutants (NIA-M20 and NIA-M29) showed higher fiber strength (g/tex) (5.5% and 8.3%) than parent (34.4%). Two mutants (NIA-M5 and NIA-M20) produced higher seed-cotton yield kg ha-1 (24.0% and 25.4%) over parent Sadori (3563 kg ha-1). The selected mutant lines on the basis of higher seed-cotton yield (kg ha-1) and enhanced fiber length (mm) compared to parent (Sadori) will be promoted in preliminary yield trials. Heritability and genetic advance were noted for early days to maturity, higher plant height (cm), sympodial branches plant-1, lengthy fiber (mm), bolls plant-1 and seed-cotton yield (kg ha-1).

scholarly journals Suitability of Pedigree Method for Improving Seed Cotton Yield and Fiber Quality Traits

2021 ◽  
Author(s):  
Abia Younas ◽  
Farrukh Illahi ◽  
Ghulam Sarwar ◽  
Iram Sharif ◽  
Shahid Munir Chohan
Keyword(s):  
Correlation Analysis ◽  
Gene Action ◽  
Fiber Quality ◽  
Phenotypic Variance ◽  
Genetic Advance ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Genotypic Variance ◽  
Seed Cotton Yield ◽  
High Heritability

Abstract Background: Cotton is grown around the globe for its fiber, which consists of unicellular seed trichome. Converging decent fiber quality and good fiber yield in cotton varieties is crucial for textile industry of any country. Pedigree method is mostly used for developing cotton varieties in Pakistan. Suitability of pedigree method for developing cotton variety is accessed in an experiment. Genotypic variance, phenotypic variance, heritability, co-heritability, genetic advance, mean comparison and correlation analysis was carried out of nine breeding lines of in fifth filial generation. Gene action was thus determined to target the traits for further yield and quality improvement of cotton fiber. Results: Substantial genetic variability existed in F5 lines. Genotypic and phenotypic variances had less differences and phenotypic variances were higher than genotypic variance indicating influence of environment on the final expression of the traits. All traits had medium to high heritability. Seed cotton yield per plant came up with high genetic advance and high heritability indicating additive gene action and can be improved by selection. Mean comparison indicated more variation for GOT% compared to other traits. Correlation analysis indicated selecting more sympodial branches for improving seed cotton yield per plant and selecting more monopodial branches for improving fiber fineness and fiber length. However, co-heritability had high value indicating that all the traits are in balance for improvement. Conclusion: Pedigree method is suitable for improving seed cotton yields and fiber quality. However, statistical check points are recommended with each proceeding generation to apply suitable selection pressure and monitor the gene action for each trait in each generation.

Heterosis studies for yield and fiber quality traits in intra hirsutum hybrids of cotton (Gossypium hirsutum L.)

2015 ◽  
Vol 35 (4) ◽  
Author(s):  
B. Srinivas ◽  
D. Bhadru
Keyword(s):  
Fiber Quality ◽  
Quality Traits ◽  
Span Length ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Fiber Quality Traits ◽  
Seed Cotton Yield ◽  
Standard Heterosis ◽  
Good Number ◽  
Heterosis Breeding

The present study was performed to evaluate the heterosis effects for seed cotton yield and fiber quality traits of 56 hybrids and their parents involving seven lines and eight testers along with a check at Acharya N.G. Ranga Agricultural University, Hyderabad. The results showed that, range of relative heterosis varied from -3.40 to 13.29 in ginning percentage, -5.28 to 14.10 in 2.5% span length, -8.72 to 8.25 in uniformity ratio, -16.39 to 14.88 in micronaire value, -5.97 to 10.02 in bundle strength and -32.57 to 113.40 in seed cotton yield per plant, where, highest number of crosses (24) with significant mid parental heterosis in desirable direction was observed for seed cotton yield per plant followed by 2.5 % span length (16) and ginning percentage (12). Desirable and significant heterosis over better parent was observed in the crosses for all the studied characters except for uniformity ratio. A good number of crosses recorded significant standard heterosis over check for all the studied parameters except for uniformity ration and micronaire value. Apart from showing considerable level of heterosis for seed cotton yield, the crosses AKH 9331 x HAG 1055 exhibited good level of heterosis for ginning percentage, Galama x L 604 and Galama x JK 344 for uniformity ratio, Galama x HAG 1055, AKH 9331 x HAG 1055 and CPD 420 x IC 356932 for 2.5% span length and CPD 420 x JK 344 and BC 68-2 x LK 861 for bundle strength. So these crosses could be exploited to improve the yield along with one or more fiber quality traits through heterosis breeding.

Development of superior hybrids for fibre quality based on heterosis and combining ability in upland cotton (Gossypium hirsutum L.)

2017 ◽  
Vol 2 (02) ◽  
pp. 185-196
Author(s):  
Sukhdeep Singh Sivia ◽  
S. S. Siwach ◽  
O. Sangwan ◽  
Sunayana .
Keyword(s):  
Combining Ability ◽  
Fiber Quality ◽  
General Combining Ability ◽  
Hybrid Breeding ◽  
Quality Traits ◽  
Fibre Quality ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Cotton Breeding ◽  
Seed Cotton Yield

The cultivated Gossypium spp. represents the most important, natural fibre crop in the world. Breeding for high cotton yield is still the primary goal of cotton breeding programs, but improving fibre quality has become increasingly important. The enhancement of fibre quality traits like fibre length, strength, and fibre fineness is an essential requirement for the modern textile industry. The objective of this study was to facilitate the selection in cotton breeding program and estimate the general combining ability (GCA) of the parents and specific combining ability (SCA) of hybrids considered for the development of high yielding and better fiber quality in early generations. The study was carried out at cotton research area, CCS Haryana Agricultural University, Hisar (India) during 2014 and 2015 kharif season. Fifteen cotton lines (which have maximum diversity) and four testers (which are known as well adapted and high yielding) were crossed in a line x tester mating design in 2014. Nineteen genotypes and 60 F1 hybrids were planted in the randomized complete block design with three replications at the same experimental area in 2015. The ratio of δ2 GCA /δ2 SCA was less than unity for all the nine characters indicating preponderance of non-additive gene action (dominance and epistasis), which is an important in exploitation of heterosis through hybrid breeding. The best general combining ability was detected from the parent H1470 for seed cotton yield, H1464 and H1098-i for fiber quality traits. SCA was significant for AC726 x H1236, ISR12 x H1226, HR1 x H1117 hybrid combinations for yield and fiber quality. The crosses H1470 x H1236 and H1470 x H1098-i were reported good heterosis for seed cotton yield as well as for fibre quality, selected the best hybrids were H1464 x H1098-i and H1463 x H1226. These cross combinations involved at least one parent with high or average GCA effect for a particular trait. The cross combination involving H1470, H1098-i and H1464 parents’ recorded significant positive heterosis with acceptable SCA effect for both yield and fibre quality parameters. This investigation concluded that the parents H1470, H1098-i and H1464 can be used in hybrid development programme with better fibre quality.

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