Indices based on culm-leaf growth, spike-grain development and relative yield for identification of heat tolerant genotypes in triticale and wheat

Abstract

A study was conducted in a set of 18 triticale and 3 wheat cultivars to identify heat tolerant genotypes under late sowing condition. A numerical taxonomic approach based on culm and leaf growth, spike and grain development and relative yield indices was used and the dendrogram revealed 6 distinct clusters. Two clusters comprising of two triticale (Bulk MI2 and TL 1210) and three wheat genotypes (OW 13, Sagarika and Utkalika) were identified as heat tolerant for use in breeding.