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New genomic regions identified for resistance to spot blotch and terminal heat stress in an interspecific population of triticum aestivum and T. spelta

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Title New genomic regions identified for resistance to spot blotch and terminal heat stress in an interspecific population of triticum aestivum and T. spelta
 
Creator Sudhir Navathe
Pandey, Ajeet Kumar
Sandeep Sharma
Chand, Ramesh
Vinod Kumar Mishra
Kumar, Dinesh
Jaiswal, Sarika K.
Mir Asif Iquebal
Velu, Govindan
Joshi, Arun Kumar
Singh, Pawan K.
 
Subject Bipolaris sorokiniana
heat stress
wheat
resistance varieties
 
Description Wheat is one of the most widely grown and consumed food crops in the world. Spot blotch and terminal heat stress are the two significant constraints mainly in the Indo–Gangetic plains of South Asia. The study was undertaken using 185 recombinant lines (RILs) derived from the interspecific hybridization of ‘Triticum aestivum (HUW234) × T. spelta (H+26)’ to reveal genomic regions associated with tolerance to combined stress to spot blotch and terminal heat. Different physiological (NDVI, canopy temperature, leaf chlorophyll) and grain traits (TGW, grain size) were observed under stressed (spot blotch, terminal heat) and non-stressed environments. The mean maturity duration of RILs under combined stress was reduced by 12 days, whereas the normalized difference vegetation index (NDVI) was 46.03%. Similarly, the grain size was depleted under combined stress by 32.23% and thousand kernel weight (TKW) by 27.56% due to spot blotch and terminal heat stress, respectively. The genetic analysis using 6734 SNP markers identified 37 significant loci for the area under the disease progress curve (AUDPC) and NDVI. The genome-wide functional annotation of the SNP markers revealed gene functions such as plant chitinases, NB-ARC and NBS-LRR, and the peroxidase superfamily Cytochrome P450 have a positive role in the resistance through a hypersensitive response. Zinc finger domains, cysteine protease coding gene, F-box protein, ubiquitin, and associated proteins, play a substantial role in the combined stress of spot blotch and terminal heat in bread wheat, according to genomic domains ascribed to them. The study also highlights T. speltoides as a source of resistance to spot blotch and terminal heat tolerance.
 
Date 2022-11-05
2023-01-17T14:28:01Z
2023-01-17T14:28:01Z
 
Type Journal Article
 
Identifier Navathe, S., Pandey, A.K., Sharma, S., Chand, R., Mishra, V.K., Kumar, D., Jaiswal, S., Iquebal, M.A., Govindan, V., Joshi, A.K. and Singh, P.K. 2022. New genomic regions identified for resistance to spot blotch and terminal heat stress in an interspecific population of triticum aestivum and T. Spelta. Plants 11(21):2987. https://hdl.handle.net/10883/22300
2223-7747
https://hdl.handle.net/10568/127297
https://hdl.handle.net/10883/22300
https://doi.org/10.3390/plants11212987
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format application/pdf
 
Publisher MDPI AG
 
Source Plants