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Marker‐assisted backcross breeding for improvement of drought tolerance in bread wheat ( Triticum aestivum L. em Thell)
Author(s) -
Rai Neha,
Bellundagi Amasiddha,
Kumar Prashant K. C.,
Kalasapura Thimmappa Ramya,
Rani Sushma,
Sinha Nivedita,
krishna Hari,
Jain Neelu,
Singh Gyanendra P.,
Singh Pradeep K.,
Chand Suresh,
Prabhu Kumble Vinod
Publication year - 2018
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12605
Subject(s) - backcrossing , biology , quantitative trait locus , limiting , cultivar , marker assisted selection , agronomy , drought tolerance , drought stress , trait , population , drought resistance , gene , genetics , mechanical engineering , demography , sociology , computer science , engineering , programming language
Drought stress is presently a major productivity limiting factor in wheat. This study developed five wheat lines with inbuilt tolerance to drought stress using marker‐assisted backcross breeding ( MABB ) approach employing three linked quantitative trait loci ( QTL s) in an initial population of 516 BC 1 F 1 plants. The high‐yielding wheat cultivar ‘ HD 2733’ grown over last few years extensively in the eastern plains of India is largely sensitive to drought and is used as the recurrent parent. ‘ HI 1500’ released for water‐limiting conditions and carrying drought‐tolerant QTL s was used as donor parent. MABB lines were advanced using foreground and background selection, coupled with stringent phenotyping. We identified 29 lines that were homozygous for targeted QTL s in different combinations with background recovery range of 89.2%–95.4%. Further evaluation of selected lines for physiological traits and distinctness, uniformity and stability ( DUS ) characters under rainfed condition identified five potential varieties for national varietal evaluation programme in the zone. The report is first of its kind in implementing known QTL s for the development of drought‐tolerant wheat lines through MABB approach.