Genetic Strategies for Heat-Tolerant Pigeon pea: A Comprehensive Review on GWAS, QTLs, and Beyond: Heat Tolerance in Pigeon pea

Dr. Dalveer Singh; Pooja Garg; Harshavardhan J  Hilli; Kanchan Kumar Singh

doi:10.21276/pt.2024.1.2.6

Authors

Dr. Dalveer Singh Sanskriti University mathura Author
Pooja Garg ICAR- National Institute for Plant Biotechnology, Pusa campus, New Delhi Author https://orcid.org/0000-0002-7100-9489
Harshavardhan J Hilli Sanskriti University Mathura Author https://orcid.org/0000-0001-6528-1892
Kanchan Kumar Singh Sanskriti University Mathura Author https://orcid.org/0009-0003-6177-6734

DOI:

https://doi.org/10.21276/pt.2024.1.2.6

Keywords:

Pigeon pea, heat stress, genetic diversity,, GWAS, QTL mapping, candidate genes, heat tolerance, climate change

Abstract

Pigeon pea [Cajanus cajan (L.) Huth], a vital global protein source, faces substantial yield losses due to severe heat stress during reproduction. Genetic diversity exploration, employing GWAS and QTL mapping, reveals markers linked to heat resistance and identifies crucial candidate genes. Heat stress disrupts germination, pod development, and photosynthesis, resulting in smaller grains. Pigeon pea's physiological responses, including a sophisticated osmotic mechanism, showcase its ability to adapt to elevated temperatures. Certain genotypes exhibit notable heat tolerance, informing the breeding of resilient cultivars. Functional genomics, using techniques like RNA-seq, uncovers key heat stress-tolerant genes, offering avenues for potential genetic modifications. The review guides transformative interventions for sustainable cultivation, emphasizing the importance of incorporating identified markers into breeding and crop management practices for effective heat mitigation. Challenges persist, including exploring gene regulation and epigenetic aspects associated with the heat stress response. This comprehensive overview contributes to the development of sustainable cultivation practices, vital for ensuring food security amid climate change.

Author Biographies

Pooja Garg, ICAR- National Institute for Plant Biotechnology, Pusa campus, New Delhi

ICAR- National Institute for Plant Biotechnology, Pusa campus, New Delhi-110012, India
Harshavardhan J Hilli, Sanskriti University Mathura

Faculty, School of Agriculture
Kanchan Kumar Singh, Sanskriti University Mathura

School of Agriculture

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