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Banaras Hindu University (2016)

Molecular mapping for drought tolerance in spring wheat Triticum aestivum L

Malik, Vipin Kumar

Titre : Molecular mapping for drought tolerance in spring wheat Triticum aestivum L

Auteur : Malik, Vipin Kumar

Université de soutenance : Banaras Hindu University

Grade : Doctor of Philosophy (PhD) 2016

Résumé
Wheat (Triticum aestivum L.) is one of the most important staple food and cereal crop feeding about 36 per cent of world’s population. Wheat is an essential crop for the food security irrespective of climatic variation ranging from temperate to tropical. Globally, it occupies about 224.70 Mha of area with the production of about 734.80 Mt (USDA, August 2016).
Most of the high yielding cultivated wheat varieties in India were bread for irrigated condition (http://www.dwr.in). Only a very few varieties (DBW16, HD2888, HI1531, NIAW917 and PBW533) have been bread for drought conditions (http://www.icar.org). Furthermore, the popular rainfed varieties like C306 and K68 were developed before Green Revolution. Therefore, to meet the need for greater wheat demand under increasing water scarcity, it is essential to develop wheat varieties that are high yielding and have acceptable level of tolerance to water stress.
The present investigation on “Molecular mapping of drought tolerance in spring wheat (Triticum aestivum L.) comprised of the following two experimental aspects. 1. Development of RIL population for drought tolerance 2. Molecular mapping for drought tolerance in spring wheat.
A set of RIL population bred from tolerant K65 and susceptible HUW468 parents of a cross K65 × HUW468 was suscessfully advanced to F6 generation using main and off-seasons at BHU, Varanasi (U.P.) and IARI, Regional Station Wellington (T.N.) for drought tolerance in wheat. In order to do molecular mapping, F7 and F8 generations of these RIL populations were used for phenotyping of drought tolerance traits at BHU, Varanasi (U.P.) and RGSC, Berkachha, Mirzapur, (U.P.) during Rabi season 2010-11 and 2011-12, respectively

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Page publiée le 13 février 2021