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Relative performance of wheat genotypes under individual and combined water deficit and salinity stress

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Title Relative performance of wheat genotypes under individual and combined water deficit and salinity stress
 
Creator Kumar, Ashwani
Singh, Jogendra
Kumar, Arvind
Krishnamurthy, SL
Mann, Anita
 
Subject Abiotic stress
Drought
GGE biplot analysis
Triticum aestivum
 
Description 49-58
Ascertaining the genetic variability and its relationships among valuable genetic resources is important for crop
improvement programme. Here, we assessed the response of eleven wheat (Triticum aestivum L.) genotypes using cluster
and principal component analysis (PCA) based on morphophysiological data and yield under nine different environments.
Wheat genotype WH 1080 maintained higher photosynthetic efficiency under individual stress of 50% water deficit
(drought) and 100 mM NaCl (salt), whereas under interactive stresses KRL 370 and KRL 283 were found to be the best
genotypes. The highest value of Na+/K+ ratio in shoots was recorded for WH 1080 (1.167) and lowest in KRL 283 (0.612)
under combined stresses. Proline accumulation was maximum in KRL 330 (3.17 mg g-1 FW) and minimum in KRL 283
(2.8 mg g-1 FW). Significantly higher reduction (73.4%) was observed in HD 2009 for grain weight/plant at 100 mM NaCl +
50% WD stress treatment whereas minimum reduction of 39.18% was recorded in KRL 370 in comparison to the control
treatment. The PCA showed that the first three components comprising about 91% of the total variation for which the
variables were analyzed. AMMI model revealed KRL 210 to be stable genotype as being close to center on biplot.
E5 environment (100 mM NaCl) was most stable followed by E9 (50% WD + 100 mM NaCl). HD 2888, C-306, HD 2851
and HD 2009 were having positive interaction with E1 (Control) whereas WH 1080 had positive interaction with water
deficit environments i.e. E2 and E3 (25 and 50% WD) while KRL 433 had highest positive interaction with combined water
deficit and salt stress environments E6, E7, E8 and E9, followed by KRL 370. Similarly, KRL 283, KRL 330, KRL 210 and
Kharchia 65 had high positive interaction with saline environments E4 and E5. Findings of the experiment would be
beneficial to wheat breeders, specifically the location-specific promising genotypes could possibly be used to develop/breed
MAGIC populations to tag genes/alleles conferring drought and salinity tolerance.
 
Date 2021-12-31T11:08:15Z
2021-12-31T11:08:15Z
2022-01
 
Type Article
 
Identifier 0975-1009 (Online); 0019-5189 (Print)
http://nopr.niscair.res.in/handle/123456789/58802
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJEB Vol.60(1) [Jan 2022]