Linkage disequilibrium and association mapping of drought tolerance in cotton (Gossypium hirsutum L.) germplasm population from diverse regions of Pakistan

Dahab, Abdelhafiz Adam; Saeed, Muhammad; Hamza, Nada Babiker; Mohamed, Bahaeldeen Babiker; Husnain, Tayyab

doi:10.5897/ajb2015.15118

Cited by 6 publications

(2 citation statements)

References 36 publications

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“…Thereafter, need based watering was given to the genotypes grown controlled conditions. The experiment was continued for 45 days (August to September, 2022) from the date of emergence of the seedlings as per the standard procedure [11]. Data on primary root length, shoot length, shoot dry weight; root dry weight and relative water content were recorded on five randomly selected plants.…”

Section: Methodsmentioning

confidence: 99%

Identification of Traits Associated with Drought Tolerance in Cotton (Gossypium hirsutum L.)

Sabitha,

Divya,

Vardhan

et al. 2024

IJPSS

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The cotton genotypes viz; NDLH-1935, NDLH-1943, NDLH-1949, NDLH-1976, NDLH-1979, NDLH-2019, Sivanandi and NDLH-2005-4 recorded comparatively higher mean values for primary root length, shoot length, shoot dry weight, root dry weight, relative water content and root/shoot ratio both under controlled and moisture-stress conditions out of 30 genotypes studied under greenhouse conditions at seedling stage during kharif, 2022-23 at RARS, Nandyal. Low to moderate range of phenotypic coefficients variability (9.54 to 25.22 and 14.16 to 24.67), higher heritability (93.00 to 98.30 and 96.30 to 99.80) coupled with higher genetic advance over mean (18.29 to 51.07 and 28.22 to 50.31) registered under controlled and moisture-stress conditions, respectively revealed the importance of additive gene action for all the characters studied. Primary root length had positive and significant phenotypic and genotypic associations with shoot length (0.3105** and 0.3211**), root dry weight (0.3294** and 0.3332**) and root/ shoot ratio (0.3688 **and 0.3753**) under controlled conditions while the same character showed either non significant or significant negative correlations (0.0355 and 0.0342, -0.0830 and -0.0702 and 0.2126** and -0.2230**) under moisture stress conditions. Shoot length showed non significant associations with all the characters studied under both the conditions. The phenotypic associations between shoot dry weight and root dry weight (0.7168** and 0.5431**) and root dry weight with root/ shoot ratio (0.8115** and 0.5515**) were significant and positive association at phenotypic level under controlled and moisture-stress conditions, respectively. Relative water content had non significant associations whereas root/ shoot ratio showed positive and significant associations with primary root length and non significant associations with all other characters under both the conditions. Based on mean values, heritability and genetic advance for primary root length, shoot dry weight, root dry weight and root/shoot ratio under both controlled and moisture stress conditions, the above characters may be considered as important parameters while selecting genotypes for improving drought tolerance ability in upland cotton.

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Section: Methodsmentioning

confidence: 99%

Identification of Traits Associated with Drought Tolerance in Cotton (Gossypium hirsutum L.)

Sabitha,

Divya,

Vardhan

et al. 2024

IJPSS

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“…Water stress condition was created by withholding water supply to the genotypes grown under treatment. The experiment was continued for 45 days from the date of emergence of the seedlings (Dahab et al, 2016).…”

Section: Methodsmentioning

confidence: 99%

Delineation of selection indices for identification of asiatic cotton (Gossypium arboreum L.) genotypes for drought tolerance ability

VENKATA

2024

APSR

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Categorization of genotypes under low moisture conditions is essential for the identification and development of drought tolerant genotypes in cotton. In the present study, 48 diverse Asiatic cotton genotypes were categorized for drought tolerance ability using two different techniques. The significant interaction between genotypes and drought treatment indicates that the studied genotypes were significantly affected by imposed treatment for measured drought tolerance related traits. The categorization of genotypes based on the cumulative score assigned for each genotype revealed the linear relationship between biomass production and drought tolerance ability. The categorization of genotypes based on comprehensive drought tolerance measurement is the finest way to identify the contrast cotton genotypes for drought tolerance ability. The Asiatic cotton genotypes NDLA 2963, NDLA 2965, NDLA 3113, NDLA 3139-3 and NDLA 2708 are identified as drought tolerant, which can be exploited for the improvement of drought tolerance ability in Asiatic cotton breeding programs.

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Genomic-Assisted Breeding for Abiotic Stress Tolerance

Rahman

Majeed

Zulfiqar

et al. 2021

Cotton Precision Breeding

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Linkage disequilibrium and association mapping of drought tolerance in cotton (Gossypium hirsutum L.) germplasm population from diverse regions of Pakistan

Cited by 6 publications

References 36 publications

Identification of Traits Associated with Drought Tolerance in Cotton (Gossypium hirsutum L.)

Identification of Traits Associated with Drought Tolerance in Cotton (Gossypium hirsutum L.)

Delineation of selection indices for identification of asiatic cotton (Gossypium arboreum L.) genotypes for drought tolerance ability

Genomic-Assisted Breeding for Abiotic Stress Tolerance

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