Evaluatiing Late Planting Stress Tolerance Indices for Some Cotton Genotypes

Drought is a wide-spread problem seriously influencing production and quality ofcotton (Gossypium hirsutum L.), but development of resistant cultivars is hamperedby the lack of effective selection criteria. The objective of this study was toevaluate the ability of several selection indices to identify drought tolerant cultivarsunder different environmental conditions. Thirteen cotton cultivars were evaluatedunder both moisture stress (2016) and non-stress (2013) field environments using arandomized complete block design for each environment. Six drought toleranceindices including stress susceptibility index (SSI), stress tolerance index (STI),tolerance index (TOL), mean productivity (MP), geometric mean productivity(GMP) and mean harmonic productivity (HMP) were used. The significant andpositive correlation of yield of genotype under non-stress condition (Yp) and MP,GMP and STI showed that these indices were more effective in identifying highyielding cultivars under different moisture conditions. The results of calculatedgain from indirect selection in moisture stress environment would improve yieldbetter than selection from non moisture stress environment. Coton breeders should,therefore, take into account the stress severity of the environment in choosing anindex. The varieties Viki and Avangard-264 had the highest yields under non-stressconditions. Vega and Chirpan-539 varieties had a low yield potential and showed ahigh stress tolerance to drought.

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RELATIVE EFFICIENCY OF SOME COTTON GENOTYPES FOR SEED COTTON YIELD AND ITS COMPONENTS UNDER LATE PLANTING

Journal of Agricultural Chemistry and Biotechnology ◽

10.21608/jacb.2014.49888 ◽

2014 ◽

Vol 5 (5) ◽

pp. 129-146

Author(s):

A. A. Ali ◽

Ola A. Galal ◽

M. E. Abd El-Salam ◽

F. E. Elfeki

Keyword(s):

Relative Efficiency ◽

Cotton Yield ◽

Seed Cotton ◽

Late Planting ◽

Seed Cotton Yield ◽

Cotton Genotypes

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EVALUATION OF COTTON (GOSSYPIUM SPP.) GERMPLASM FOR HEAT TOLERANCE UNDER NORMAL AND LATE PLANTING TIME

Cercetari Agronomice in Moldova ◽

10.46909/cerce-2020-022 ◽

2020 ◽

Vol 53 (3) ◽

pp. 255-265

Author(s):

Emine KARADEMIR ◽

C. KARADEMIR ◽

B. KOLAY ◽

V. SEZENER ◽

H. BASAL

Keyword(s):

Heat Tolerance ◽

Agricultural Research ◽

Limiting Factor ◽

Late Planting ◽

Planting Time ◽

Susceptibility Index ◽

Cotton Genotypes ◽

Heat Tolerant ◽

Four Blocks ◽

Heat Susceptibility Index

The objective of this study was to determine cotton (Gossypium ssp.) germplasm for heat tolerance under normal and late planting time. For this aiming 200 cotton genotypes and five check varieties (Gloria, SG 125, Flash, Ozbek 105 and Candia) were evaluated under two different temperature regimes and experiments were conducted according to the augmented design with four blocks. Field studies were carried out at the GAP International Agricultural Research and Training Center’s experimental area in Diyarbakır, Turkey, in 2016 cotton growing season. In the study heat susceptibility index was used for discriminate to the genotypes for heat tolerance. Genotypes were classified into four groups based on the heat susceptibility index. The results of this study indicated that five cotton genotypes (TAM 139-17 ELS, CIM-240, Haridost, MNH-990 and AzGR-11835) were in highly heat tolerant, 28 genotypes were found heat tolerant, 56 genotypes were in the moderately heat tolerant and other 120 genotypes were observed susceptible for heat tolerance. Based on the heat susceptibility index, five cotton genotypes can be used as parent for heat tolerance improvement in the cotton breeding program where high temperature is a limiting factor for seed cotton yield.

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