Harnessing Genetic Variation in Physiological and Molecular Traits to Improve Heat Tolerance in Food Legumes

Poonam Devi, Shikha Chkaudhary, Anjali Bhardwaj, Manu Priya, Uday Jha, Aditya Pratap, Shiv Kumar, Hanumantharao Bindumadahva, Inderjit Singh, Sarvjeet Singh, P. V.Vara Prasad, Kadambot H.M. Siddique, Harsh Nayyar

Research output: Chapter in Book/Conference paperChapterpeer-review

Abstract

Plant genetic variations provide opportunity to develop new and improved cultivars with desired characteristics, hence gaining major attention from the scientists and breeders all over the world. Harnessing genetic variability is the key factor in the adaptation of plants to ever-rising temperature. Nowadays, such characteristic traits among the population can be used to develop various heatresilient crop varieties and have a profound effect on restoring the balance between climate change and agriculture. Genetic variations in physiological and molecular traits proved to be the major components for breeding programs to augment the gene pool. With genetic variations, it is possible to identify the phenotypic variations governed either by a single gene or by many genes that will be helpful for mapping associated quantitative trait loci. Genetic variations can also be traced by examining various physiological traits of a crop plant like growth traits (biomass, plant height, and root growth), leaf traits (stomatal conductance, chlorophyll content, chlorophyll fluorescence, photosynthetic rate, membrane stability, sucrose content, and canopy temperature depression), and floral traits (mainly associated with male gametophyte). Yield traits can also display enormous variation, making it highly useful/reliable for screening purposes. Further, genetic variation at the biochemical level can be assessed by measuring the expression of enzymes (related to oxidative stress and antioxidants) and metabolites (both primary and secondary). Evaluating how genetic variation influences phenotype is the ultimate objective of genetics, and using omics approaches can improve the understanding of heat tolerancegoverning mechanisms. Further, collecting molecular data at different levels of plant growth and development will help to accelerate our understanding of the mechanisms linking genotype to phenotype.

Original languageEnglish
Title of host publicationLegumes
Subtitle of host publicationPhysiology and Molecular Biology of Abiotic Stress Tolerance
PublisherSpringer Nature
Chapter2
Pages27-69
Number of pages43
ISBN (Electronic)9789811958175
ISBN (Print)9789811958168
DOIs
Publication statusPublished - 1 Jan 2023

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