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Identification of Wheat Genotypes Resilient to Terminal Heat Stress Using GGE Biplot Analysis

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Journal of Soil Science and Plant Nutrition Aims and scope Submit manuscript

Abstract

Terminal heat stress (THS) is a major abiotic stress causing reduction in grain weight, size, number and quality of wheat crop. Most of the earlier studies have focused on identifying THS-tolerant genotypes mainly by late sowing, which generally has gradual increase in temperature. But the recent climate change demands for the genotypes to withstand for both gradual and sudden rise in THS. Thus, the present study was undertaken to identify high-yielding and more stable genotypes for both gradual and sudden rise in THS. In this study, 26 wheat genotypes were screened under three sowing conditions, viz., timely sown (TS), late sown (LS) for gradual increase in THS and temperature-controlled phenotyping facility (TCPF), to impose sudden THS during 2017–2018 and 2018–2019. The experiment was laid out in Alpha-lattice design with uniform plot size (0.80 m × 0.80 m2) containing 4 rows with 20-cm distance between each row and replicated twice. To study the nature of relationship among traits, Pearson correlation analysis was done and GGE-biplot analysis was used to discriminate the genotypes with superior yield and stability. ANOVA revealed significant (p =  ≤ 0.05) effect of the genotypes, condition and genotype × condition on grain yield and other parameters. Pearson correlation revealed positive interaction of grain yield with thousand grain weight and harvest index, while days to heading and maturity had a negative association under normal and heat-stressed conditions. GGE-biplot efficiently explained 91.03% of the interaction effect, and ideal view model ranked genotype as DBW71 > AKW2862-1 > DBW173 > DBW107 > HD2932 > WH730 > KKR1043 > other lines. Which-won-where model of GGE revealed DBW71 with comparatively high yield (LS = 330.1 g m−2, TCPF = 194.5 g m−2) as wining genotype in both gradual and sudden stress conditions. Whereas, with the mean-versus-stability model, DBW173 (LS = 337.2 g m−2, TCPF = 167.0 g m−2) and WH730 (LS = 334.8 g m−2, TCPF = 236.9 g m−2) analysed as highly stable genotypes across both type of stress conditions. From this study, DBW71, DBW173 and WH730 were identified as the most stable genotypes for both sudden and gradual rise in THS and these stable genotypes can serve in identifying the most reliable molecular markers for improving climate resilience in wheat under heat stress condition.

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Funding

The authors gratefully acknowledge the financial support in carrying out this research work from ICAR-Network Project on Functional Genomics and Genetic Modification in Crops “Project Code OXXO1347 and the in-house project CRSCIIWBRSIL 201500400185.

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Correspondence to Ratan Tiwari.

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The authors declare no competing interests.

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Fig. S1 Overview of the study conducted under field conditions (Timely sown; TS & late sown; LS) and temperature controlled phenotyping facility (TCPF) representing planting for TCPF and TS was done in November while for LS it was in December. Effects of gradual (LS condition) and sudden (TCPF) heat shock measured w.r.t. non-stress condition (TS) (JPG 577 kb)

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Fig. S2 Monthly total rainfall (RF) at Indian Institute of Wheat and Barley Research, Karnal, during experimental years (2017-18 and 2018-19) compared with long term averages (LTA) (1972–2018) (PNG 371 kb)

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Supplementary file6

Fig. S3 Boxplot of BLUEs for wheat days to heading (DH), days to maturity (DM), plant height (PH) (cm), tiller number per four plant (TNFP) and spikelets per spike (SpPS) under timely sown (TS) and heat stress conditions viz. late sown (LS) and temperature controlled phenotyping facility (TCPF); horizontal bars present mean value of the respective genotypes and vertical line gives the range of corresponding traits represents comparative behaviour of the genotypes for specific trait in three growing condition observed by 3 graphs arranged in horizontal plane (PNG 398 kb)

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Supplementary file7

Fig. S4 Boxplot of BLUEs for wheat spike length (SL) (cm), thousand grain weight (TGW) (g), biomass per meter square (BMPM) (kg m-2), grain yield (GY) (g m-2) and harvest index (HI) (%) under timely sown (TS) and heat stress conditions viz. late sown (LS) and temperature controlled phenotyping facility (TCPF); horizontal bars present mean value of the respective genotypes and the vertical line gives the range of corresponding traits represents comparative behaviour of the genotypes for specific trait in three growing condition observed by 3 graphs arranged in horizontal plane (PNG 251 kb)

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Devi, K., Chahal, S., Venkatesh, K. et al. Identification of Wheat Genotypes Resilient to Terminal Heat Stress Using GGE Biplot Analysis. J Soil Sci Plant Nutr 22, 3386–3398 (2022). https://doi.org/10.1007/s42729-022-00894-w

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  • DOI: https://doi.org/10.1007/s42729-022-00894-w

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