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Genetic variability in wheat genotypes for salt tolerance, growth and physiological responses

机译：小麦基因型对耐盐性，生长和生理响应的遗传变异

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摘要

In arid and semi-arid regions of the world, soil salinity is becoming a majo r problem for crop pro duction due to changing climate an d sho rtage of good quality water. In these circumstan ces, screenin g, b reeding and cu ltivation of food crop species or genotypes with high tolerance to salinity may be considered as the mo st feasible and effective approach, for fulfilling the safe food requiremen t of increa sing po pulation. Therefore, a hydroponic study was conducted to evaluate the genetic va riations in Pakistani wheat genotypes for salt tolerance. In present study, two salinity levels (100 and 200 mM NaCl) along with a control and twelve wheat geno types were evalu ated. The results sh owed that SARC-I (V 5 ), Sehar-200 6 (V 8 ) and Shafaq-2006 (V 9 ) were found tolerant to salinity because of b etter g rowth, lower NaCl relative toxicities, leaf Na + , higher to lerance indices, photosynthetic rate, total chlorophyll contents, transpiration rate, stomatal conductance and leaf K + concentration. Thus, these genotypes were found as valuable resource that can be used in further wheat breeding programs aimed at increasing salinity tolerance.
机译：在世界干旱和半干旱地区，由于气候变化和优质水的供应，土壤盐分正成为作物生产的主要问题。在这种情况下，对盐分具有高度耐受性的粮食作物种类或基因型的筛选，繁殖和栽培可被视为最可行和有效的方法，以满足增加人口的安全食品需求。因此，进行了一项水培研究，以评估巴基斯坦小麦基因型的耐盐性遗传变异。在本研究中，评估了两个盐度水平（100和200 mM NaCl）以及一个对照和十二种小麦基因型。结果表明，发现SARC-1（V 5），Sehar-200 6（V 8）和Shafaq-2006（V 9）具有更好的耐盐性，因为它具有更好的耐盐性，较低的NaCl相对毒性，叶片Na +，耐性指数，光合速率，总叶绿素含量，蒸腾速率，气孔导度和叶片钾离子浓度更高。因此，发现这些基因型是有价值的资源，可用于进一步的小麦育种计划中，以提高耐盐性。

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