Quantitative trait loci (QTL) mapping for physiological and biochemical attributes in a Pasban90/Frontana recombinant inbred lines (RILs) population of wheat (Triticum aestivum) under salt stress condition |
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| Institution: | 1. Department of Botany, Pir Mehr Ali Shah (PMAS) Arid Agriculture University, Rawalpindi, Pakistan;2. Department of Agriculture, Bacha Khan University, Charsada. P.O. Box 20, Khyber Pakhtun Khwa, Pakistan;3. Department of Plant Breeding and Genetics, Bahaudin Zakaria University, Multan 60800, Pakistan;4. Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus (22060), Khyber Pakhtunkhwa, Pakistan;5. Department of Plant Breeding & Genetics, Pir Mehr Ali Shah (PMAS) Arid Agriculture University, Rawalpindi, Pakistan;6. Department of Plant Breeding and Genetics, University of Agriculture, Sub-Campus Burewala-Vehari, Pakistan;7. School of Landscape Architecture and Ornamental Horticulture, Beijing Forestry University, PR China;8. Department of Agronomy, Pir Mehr Ali Shah (PMAS) Arid Agriculture University, Rawalpindi, Pakistan;9. Cotton Research Station, Rahim Yar Khan, Government of Punjab, Pakistan;10. Institute of Plant Protection, Muhammad Nawaz Shareef (MNS) University of Agriculture, Multan 60000, Pakistan;11. Bee Research Chair, Department of Plant Protection, College of Food and Agricultural Sciences, King Saud University, Riyadh, P.O. Box 2460, Riyadh 11451, Saudi Arabia |
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| Abstract: | Salt stress causes nutritional imbalance and ion toxicity which affects wheat growth and production. A population of recombinant inbred lines (RILs) were developed by crossing Pasban90 (salt tolerant) and Frontana (salt suceptible) for identification of quantitative trait loci (QTLs) for physiological traits including relative water content, membrane stability index, water potential, osmotic potential, total chlorophyll content, chlorophyll a, chlorophyll b and biochemical traits including proline contents, superoxide dismutase, sodium content, potassium content, chloride content and sodium/potassium ratio by tagging 202 polymorphic simple sequence repeats (SSR) markers. Linkage map of RILs comprised of 21 linkage group covering A, B and D genome for tagging and maped a total of 60 QTLs with major and minor effect. B genome contributed to the highest number of QTLs under salt stress condition. Xgwm70 and Xbarc361 mapped on chromosome 6B was linked with Total chlorophyll, water potential and sodium content. The increasing allele for all these QTLs were advanced from parent Pasban90. Current study showed that Genome B and D had more potentially active genes conferring plant tolerance against salinity stress which may be exploited for marker assisted selection to breed salinity tolerant high yielding wheat varieties. |
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| Keywords: | Genome Plant attributes QTLs Wheat Salt stress |
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