Vol. 10, Issue 7 (2021)

Author(s):
Dr. Raveendran Muthurajan, Bharathi Ayyenar, Rohit Kambale and Veera Ranjani Rajagopalan

Abstract:
Rice is an important cereal crop in many countries, with majority of Asians eating rice as a staple diet and 70 per cent in South Asia alone. Global warming poses serious threats to global agriculture productivity. As a result of global climate change events, the surface air temperature will rise by 1.4 - 5.8 °C by the end of the twenty-first century. Rice is extremely susceptible to high temperatures and increased exposure to high temperatures will have greater impacts on rice yield. Improved knowledge on the molecular genetic basis of high temperature tolerance, discovery of genes underlying the QTLs and mining elite alleles of these candidate genes will accelerate development of heat resilient rice cultivars. In the present study, allelic diversity of a thermo tolerance gene SLG1 (Slender guy1) was analyzed in a diverse set of aus rice germaplsm in the 3K genome panel. Bioinformatic analysis of OsSLG1 (LOC_Os12g39840) sequence among the 201 aus rice genotypes revealed the presence of one non-synonymous SNP in the 6^th exon. This SNP grouped the 201 aus lines into two haplogroups (H1 and H2). Further marker-trait association analysis will identify the elite allele of OsSLG1.