Field Screening of Cotton Genotypes for Drought Tolerance on the Basis of Yield and Fibre Traits

The limited water supply for irrigation is a major constraint to cotton production. Morphological and physiological traits provide useful information for drought tolerance. This research work was carried out for the identification of cotton genotypes having better drought tolerance. For this purpose, forty (40) genotypes of upland cotton were studied under two moisture regime, i.e. normal and drought environment in field conditions. The experiment was conducted using split plot design under RCBD arrangement. All the genotypes behaved differently under two moisture levels. The interaction of cotton genotypes with two moisture levels were studied for various traits, i.e. plant height, sympodial branches, seed cotton yield, boll weight, number of bolls per plant, excised leaf water loss and relative water content by using Principle Component Analysis (PCA). Results showed that the genotypes VH-144, IUB-212, MNH-886, VH-295, IR-3701, AA-802, NIAB-111, NS-121, FH-113, and FH-142 are either stable or showing positive interaction with drought conditions for most of the traits under studied. These genotypes can be used in further breeding program for developing varieties suitable for cultivation under drought conditions, whereas; IR-3, CIM-443, FH-1000, MNH-147, S-12 interacted undesirably with drought stress

Download Full-text

Screening cotton genotypes for seedling drought tolerance

Genetics and Molecular Biology ◽

10.1590/s1415-47571998000400023 ◽

1998 ◽

Vol 21 (4) ◽

pp. 545-549 ◽

Cited By ~ 11

Author(s):

Julio C. Viglioni Penna ◽

Laval M. Verhalen ◽

M.B. Kirkham ◽

Ronald W. McNew

Keyword(s):

Drought Tolerance ◽

Screening Method ◽

Screening Tests ◽

High Survival ◽

Germplasm Collections ◽

Confirmation Test ◽

Wide Range ◽

Cotton Genotypes ◽

Field Information ◽

Designs Of Experiments

The objectives of this study were to adapt a screening method previously used to assess seedling drought tolerance in cereals for use in cotton (Gossypium hirsutum L.) and to identify tolerant accessions among a wide range of genotypes. Ninety genotypes were screened in seven growth chamber experiments. Fifteen-day-old seedlings were subjected to four 4-day drought cycles, and plant survival was evaluated after each cycle. Three cycles are probably the minimum required in cotton work. Significant differences (at the 0.05 level or lower) among entries were obtained in four of the seven experiments. A "confirmation test" with entries previously evaluated as "tolerant" (high survival) and "susceptible" (low survival) was run. A number of entries duplicated their earlier performance, but others did not, which indicates the need to reevaluate selections. Germplasms considered tolerant included: `IAC-13-1', `IAC-RM4-SM5', `Minas Sertaneja', `Acala 1517E-1' and `4521'. In general, the technique is simple, though time-consuming, with practical value for screening a large number of genotypes. Results from the screening tests generally agreed with field information. The screening procedure is suitable to select tolerant accessions from among a large number of entries in germplasm collections as a preliminary step in breeding for drought tolerance. This research also demonstrated the need to characterize the internal lack of uniformity in growth chambers to allow for adequate designs of experiments.

Download Full-text

Evaluation of Cotton Genotypes for Drought Tolerance using PEG-6000 Water Stress by Slanting Glass Plate Technique

International Journal of Current Microbiology and Applied Sciences ◽

10.20546/ijcmas.2020.911.386 ◽

2020 ◽

Vol 9 (11) ◽

pp. 3203-3212

Author(s):

K. N. Pawar ◽

V. B. Veena

Keyword(s):

Water Stress ◽

Drought Tolerance ◽

Glass Plate ◽

Peg 6000 ◽

Plate Technique ◽

Cotton Genotypes

Download Full-text

A novel parent selection strategy for the development of drought-tolerant cotton cultivars

Plant Genetic Resources ◽

10.1017/s1479262121000332 ◽

2021 ◽

pp. 1-9

Author(s):

Waqas Shafqat Chattha ◽

Hafiz Basheer Ahmad ◽

Muhammad Awais Farooq ◽

Waqar Shafqat ◽

Muhammad Yaseen ◽

...

Keyword(s):

Drought Tolerance ◽

Gene Action ◽

Principal Component ◽

Selection Strategy ◽

Additive Gene Action ◽

Heat Map ◽

Partial Dominance ◽

Drought Conditions ◽

Cotton Genotypes ◽

Additive Gene

Abstract Drought is a devastating factor for crop production worldwide. Therefore, an experiment was conducted to study genetics for some agro-physiological traits in cotton under drought stress. The 13 parental cotton genotypes along with their 30 F1 hybrids were planted under normal and drought conditions. The mean performance of the genotypes was assessed through principal component and heat map analyses. The principal component analyses revealed 53.99 and 53.15% in the first two principal components of variability for normal and drought conditions, respectively. Heat map analysis revealed that three cotton genotypes i.e. FH-207 × NS-131, FH-207 × KZ-191 and S-15 × AA-703 attained higher values for all the traits except for canopy temperature under drought conditions. These crosses may proliferate to further filial generations to identify transgressive segregates for drought tolerance. The heritable differences of F̅1 and mid-parent showed dominance and non-additive gene action under drought conditions. Heritable differences between F̅1 and P̅1 showed over dominance and partial dominance under drought conditions. Heritable differences between F̅1 and P̅2 indicated negative over dominance and partial dominance for all traits under drought conditions. Proline contents and the bolls per plant showed high heritability and genetic advance through additive gene action. Therefore, these two traits can be used as a means of selection in future breeding programmes of drought tolerance.

Download Full-text