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Marker-assisted backcross breeding for heat tolerance in bread wheat ( Triticum aestivum L.).

التفاصيل البيبلوغرافية
العنوان: Marker-assisted backcross breeding for heat tolerance in bread wheat ( Triticum aestivum L.).
المؤلفون: Bellundagi A; ICAR-Indian Institute of Millets Research, Hyderabad, India.; ICAR-Indian Agricultural Research Institute, New Delhi, India., Ramya KT; ICAR-Indian Institute of Oilseeds Research, Hyderabad, India., Krishna H; ICAR-Indian Agricultural Research Institute, New Delhi, India., Jain N; ICAR-Indian Agricultural Research Institute, New Delhi, India., Shashikumara P; ICAR-Indian Institute of Millets Research, Hyderabad, India.; ICAR-Indian Grassland and Fodder Research Institute, Jhansi, India., Singh PK; ICAR-Indian Agricultural Research Institute, New Delhi, India., Singh GP; ICAR-Indian Institute of Wheat and Barley Research, Karnal, India., Prabhu KV; Protection of Plant Varieties and Farmers' Rights Authority, Government of India, New Delhi, India.
المصدر: Frontiers in genetics [Front Genet] 2022 Dec 08; Vol. 13, pp. 1056783. Date of Electronic Publication: 2022 Dec 08 (Print Publication: 2022).
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Frontiers Research Foundation Country of Publication: Switzerland NLM ID: 101560621 Publication Model: eCollection Cited Medium: Print ISSN: 1664-8021 (Print) Linking ISSN: 16648021 NLM ISO Abbreviation: Front Genet Subsets: PubMed not MEDLINE
أسماء مطبوعة: Original Publication: Lausanne : Frontiers Research Foundation.
مستخلص: Manipulation of flowering time for adaptation through natural or genetic approaches may combat heat-stress damage that occurs at the reproductive stages in production conditions. HD2733, a popular wheat variety of the eastern plains of India, is largely sensitive to heat stress. Therefore, the current study aims to improve heat tolerance of HD2733 by introgression of QTLs associated with early anthesis and high kernel weight linked to markers X barc186 and X gwm190 , respectively, through marker-assisted backcross breeding (MABB) from a tolerant donor, WH730. A total of 124 simple sequence repeat (SSR) markers distributed evenly across the genome were used for the background selection. The alleles of Xbarc186 and X gwm190 were fixed in BC 2 F 1 and BC 1 F 2 generations by selecting individual plants heterozygous for both marker loci and backcrossed with HD2733 and simultaneously selfed to generate BC 2 F 1 and BC 1 F 2 populations, respectively. Furthermore, the selected BC 1 F 2 were selfed to generate the BC 1 F4 population. By background screening, a total of 39 BC 2 F 3 and 21 BC 1 F 4 families homozygous for the targeted QTLs with 90.9-97.9% and 86.8-88.3% RPG recoveries were selected. The best performing 17 BC 2 F 3 and 10 BC 1 F 4 lines were evaluated for various morpho-physiological traits. Phenotypic evaluation and multi-location trials of the introgressed lines under late sown conditions led to the selection of three promising lines with early anthesis and higher grain yield. The improved lines will serve as an excellent genetic material for functional genomics and expression studies to understand the molecular mechanisms and pathways underlying the stress tolerance.
Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
(Copyright © 2022 Bellundagi, Ramya, Krishna, Jain, Shashikumara, Singh, Singh and Prabhu.)
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فهرسة مساهمة: Keywords: MABB; backcross; early anthesis; heat tolerance; markers
تواريخ الأحداث: Date Created: 20221226 Latest Revision: 20230103
رمز التحديث: 20240628
مُعرف محوري في PubMed: PMC9785257
DOI: 10.3389/fgene.2022.1056783
PMID: 36568399
قاعدة البيانات: MEDLINE
الوصف
تدمد:1664-8021
DOI:10.3389/fgene.2022.1056783