Characterization of RILs for Heat Tolerance for Physio-morphological Trait in Bread Wheat (Triticum aestivum L.)

Author: Harpreet Singh*, Om Prakash Yadav, Surbhi Kohli, Deepak Kaushik, Ashok and Kanheya Lal Yadav

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Abstract

Wheat (Triticum aestivum L.) as a major cereal grass of Graminae family and genus Triticum, and is the world’s largest grown cereal crop. Among all abiolic stresses high temperature is an major abiotic stress limiting production of crops in all regions were wheat is grown. Climate change is reported to loss of agricultural production the most, with severe effects of high temperature, challenging researchers toward developing strategies to counter stress. These constraints to global food supply encourage research for development of heat resistant genotypes, which are resilient to climate change. In this research we use RIL population for studying heat stress and in understanding the physiological and morphological mechanism of heat tolerance. In current research a set of 30 bread wheat recombinant inbred lines which were derived from three cross viz. LOK-1 and HUW- 468, LOK 1 and HUW 234 and Raj-4014 and PBN-51, along with two controls namely PBN-51 and HUW-234, were studied using

Keywords

RIL, Heat tolerance, Physiological, morphological, genetic variation, PCV, GCV.

Conclusion

Study of GCV and PCV values indicates that characters such as canopy temperature, plant height, flag leaf area and thousand grain weight with high and medium GCV indicating that selection may be effectively based on these characters. Grain yield, tiller per plant and canopy temperature exhibited medium values of heritability with moderate value of genetic advance whereas RWC shows high value of heritability with moderate genetic advance. High value of heritability and high value of genetic gain was reported for flag leaf area. Chlorophyll content showed high value for PBN-51 followed by cross 2 RIL 15, Cross 3 RIL 23 and Cross 3 RIL 24, with nearly same values showing low chloroplast damage due to high temperature. For relative water content Cross 1RIL 2 showed high value followed by Cross 1 RIL 4, Cross 3 RIL 29 showing better water status under dehydration Some important result can be established from the present study that tillers per plant, chlorophyll content, number of tillers

References

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How to cite this article

Harpreet Singh, Om Prakash Yadav, Surbhi Kohli, Deepak Kaushik, Ashok and Kanheya Lal Yadav (2022). Characterization of RILs for Heat Tolerance for Physio-morphological Trait in Bread Wheat (Triticum aestivum L.). Biological Forum – An International J