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Banaras Hindu University (2018)

Genetic analysis of yield and its attributing traits in barley Hordeum vulgare L under rainfed condition


Titre : Genetic analysis of yield and its attributing traits in barley Hordeum vulgare L under rainfed condition

Auteur : Madhukar,Kuduka

Université de soutenance : Banaras Hindu University

Grade : Doctor of Philosophy (PhD) 2018

Résumé partiel
Barley (Hordeumvulgare L.) is an annual cereal grain and fodder crop belonging to the family Poaceae, tribe triticeae and genus Hordeumwhich consists of about 32 species including the wild and cultivated one. Barley is a diploid with 2n= 14 chromosomes. The cultivated barley (Hordeumvulgare ssp. vulgare) is one of the oldest cultivated plants. Barley ranks worldwide as number four crop after maize, rice and wheat with a share of 7% of the global cereal production. It is frequently being described as the most cosmopolitan of the crops and also considered, as poor man’s crop because of its low input requirement and better adaptability to problematic and marginal lands. Though barley is widely adaptable to various climatic and soil conditions because of its tolerance towards cold, drought, alkali, salinity and wide range of environments than any other cereal, including extremes of latitude, longitude and high altitude, still there is enough potential left in it to improve its productivity. The national consumption of malt based baby food, energy drinks, chocolates, and other confectionery items is on fast rise in urban areas and spreading in rural areas as well. Therefore, there is a necessity to improve the production of barley. Since, high yielding wheat varieties have replaced barley in rainfed, marginal and diara lands in India, one of the ways to improve its productivity is through breeding for drought tolerance and increase the water use efficiency in arid and semi-arid regions. Water is fundamental to life and its shortage can cause unprecedented risks to the survival of flora and fauna. Land plants suffer more because of their sessile mode and hence, drought is by far the most devastating abiotic stress that limits agricultural production worldwide. It is a serious problem in many arid and semi-arid environments, where the rainfall varies from year to year. India has experienced many such crisis situations with varying magnitude, duration and extent. Plants respond to drought stress by means of adaptive mechanisms that allow the photochemical and biochemical system to cope with the stress. Investigating the drought-tolerance mechanisms in barley could facilitate a better understanding of the genetic bases of drought tolerance, and so enable the effective use of genetic and genomic approaches to improve its drought tolerance. Therefore, selection and development of drought tolerant cultivars is of great priority to reduce the adverse effects of drought for more consistent levels of crop production.

Présentation et version intégrale (Shodhganga)

Page publiée le 5 février 2021