Evaluation of Selection Indices in Screening Durum Wheat Genotypes Combining Drought Tolerance and High Yield Potential

Patel, J.M.; Patel, Anjalkumar; Patel, C. R.; Mamrutha, H. M.; Sharma, Poonam; Pachchigar, Karen P.

doi:10.20546/ijcmas.2019.804.134

Cited by 12 publications

(7 citation statements)

References 22 publications

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“…Therefore, these indices are equivalent for ranking genotypes for stress tolerance and they could be interchangeably used as a substitute for each other. A similar trend of results was found by Saad et al (2014) Fouad (2018) and Patel (2019).…”

Section: Stress Tolerance Indicessupporting

confidence: 88%

The Modified Genotype by Trait (Gt) Biplot Technique as Selection Criterion in Wheat under Reduced Irrigarion

2019

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Section: Stress Tolerance Indicessupporting

confidence: 88%

The Modified Genotype by Trait (Gt) Biplot Technique as Selection Criterion in Wheat under Reduced Irrigarion

2019

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“…This could be ascribed to evaluate the selected families at Toshka region for one season. These results are in general agreement with those reported by Memon et al (2018) and Patel et al (2019).…”

Section: Pedigree Selection For Gyps Ngps 100-gw and (Gypp) Variabsupporting

confidence: 94%

Pedigree Selection in Bread Wheat Under Water Deficit for Yield in Toshka Conditions

Nassar

2019

Egyptian Journal of Desert Research

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The water treatments were 100 and 67% of the irrigation requirements of wheat in Toshka as normal and drought condition, respectively. A transgressive segregation in both populations for all studied traits inducted the suitability of those material for pedigree selections. The genetic advanced for grain yield/plant and its components were greater in population 2 than in population 1 in the first cycle in pedigree selection. Highly significant differences among the selected families for all the studies traits were observed in both populations under normal and drought conditions. After one cycles of selection, the broad sense heritability was very high for most traits and reached 77.79 and 92.02% for grain yield/plant under normal irrigation, while were 87.53 and 93.12% under drought stress in population 1 and population 2, respectively. Two cycles of pedigree selection for grain yield/plant was enough to detect the best families and could be performed in the early segregating generations. It could be concluded that single trait selection was efficient to improve the selection criteria in these populations. These genotypes could be sources for drought tolerance.

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“…This suggests that in this study, drought stress was moderate but enough to facilitate the selection of drought-tolerant accessions. Moderate drought stress was reported as recommended to select drought-tolerant wheat lines (Ali and El-Sadek, 2016 ; Patel et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

“…This relation provides the basis for utilizing drought tolerance indices as a means to explain the phenotypic variation. It has been also reported that drought tolerance indices can be derived from GY and traits that are strongly and positively correlated with GY as a measure for selecting the best genotypes (Farshadfar et al, 2012 ; Patel et al, 2019 ; Ayed et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

“…Drought indices provide a mathematical measure for yield loss under drought stress conditions as compared to non-stress conditions in screening drought-tolerant genotypes (Fernandez, 1992 ; Mitra, 2001 ). They have been widely used for screening drought-tolerant genotypes in durum wheat (Patel et al, 2019 ), bread wheat (Abdolshahi et al, 2012 ; Song et al, 2017 ), barley (Sallam et al, 2019 ), and maize (Naghavi et al, 2013 ; Yousefi, 2015 ). The drought susceptibility index (DSI) is used to measure yield stability in wheat genotypes that apprehends the changes in both drought stress and non-stress environments (Fischer and Maurer, 1978 ).…”

Section: Introductionmentioning

confidence: 99%

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Association Mapping of Drought Tolerance Indices in Ethiopian Durum Wheat (Triticum turgidum ssp. durum)

et al. 2022

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Ethiopia is a major producer of durum wheat in sub-Saharan Africa. However, its production is prone to drought stress as it is fully dependent on rain, which is erratic and unpredictable. This study aimed to detect marker-trait associations (MTAs) and quantitative trait loci (QTLs) related to indices. Six drought tolerance indices, i.e., drought susceptibility index (DSI), geometric mean productivity (GMP), relative drought index (RDI), stress tolerance index (STI), tolerance index (TOL), and yield stability index (YSI) were calculated from least-square means (lsmeans) of grain yield (GY) and traits significantly (p < 0.001) correlated with grain yield (GY) under field drought stress (FDS) and field non-stress (FNS) conditions. GY, days to grain filling (DGF), soil plant analysis development (SPAD) chlorophyll meter, seeds per spike (SPS), harvest index (HI), and thousand kernel weight (TKW) were used to calculate DSI, GMP, RDI, STI, TOL, and YSI drought indices. Accessions, DW084, DW082, DZ004, C037, and DW092 were selected as the top five drought-tolerant based on DSI, RDI, TOL, and YSI combined ranking. Similarly, C010, DW033, DW080, DW124-2, and C011 were selected as stable accessions based on GMP and STI combined ranking. A total of 184 MTAs were detected linked with drought indices at –log10p ≥ 4.0,79 of which were significant at a false discovery rate (FDR) of 5%. Based on the linkage disequilibrium (LD, r2 ≥ 0.2), six of the MTAs with a positive effect on GY-GMP were detected on chromosomes 2B, 3B, 4A, 5B, and 6B, explaining 14.72, 10.07, 26.61, 21.16, 21.91, and 22.21% of the phenotypic variance, respectively. The 184 MTAs were clustered into 102 QTLs. Chromosomes 1A, 2B, and 7A are QTL hotspots with 11 QTLs each. These chromosomes play a key role in drought tolerance and respective QTL may be exploited by marker-assisted selection for improving drought stress tolerance in wheat.

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Evaluation of Selection Indices in Screening Durum Wheat Genotypes Combining Drought Tolerance and High Yield Potential

Cited by 12 publications

References 22 publications

The Modified Genotype by Trait (Gt) Biplot Technique as Selection Criterion in Wheat under Reduced Irrigarion

The Modified Genotype by Trait (Gt) Biplot Technique as Selection Criterion in Wheat under Reduced Irrigarion

Pedigree Selection in Bread Wheat Under Water Deficit for Yield in Toshka Conditions

Association Mapping of Drought Tolerance Indices in Ethiopian Durum Wheat (Triticum turgidum ssp. durum)

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