Indian Journal of Genetics and Plant Breeding (The)
SCOPUSWeb of Science
  • Year: 2023
  • Volume: 83
  • Issue: 1

Use of thermal indices as selection criteria in breeding programme of rice (Oryza sative L.)

  • Author:
  • Daizi Durba Saharia, M. K. Sarma*, P. Neog1, Abu Saleh Nizamuddin Ahmed, Manash Protim Nath, Nigombam Sonia Devi, Jugal Chandra Talukdar
  • Total Page Count: 4
  • Page Number: 139 to 142

1Department of Agricultural Meteorology, B.N. College of Agriculture, Assam Agricultural University, Biswanath Chariali, 784 176, Assam, India

Department of Plant Breeding and Genetics, B.N. College of Agriculture, Assam Agricultural University, Biswanath Chariali, 784 176, Assam, India

*Corresponding Author: M.K. Sarma, Department of Plant Breeding and Genetics, B.N. College of Agriculture, Assam Agricultural University, Biswanath Chariali, 784 176, Assam, India, E-Mail: mksbnca@gmail.com

Online Published on 11 August, 2023.

Abstract

A set of 58 rice cultivars from Assam were studied to investigate the thermal indices and yield components as the selection criteria. Significant genetic variation was observed for the three thermal indices studied. Estimation of variability parameters indicated high heritability coupled with high genetic advance for the three thermal indices, viz., Growing Degree Days (GDD), Helio-Thermal Units (HTU) and Heat Use Efficiency (HUE) along with grain yield and other yield components. Grain yield was observed to be contributed positively and significantly by the three thermal indices in specific growth intervals apart from other yield components.

Keywords

Rice, Thermal indices, Genetic parameters, Character association, Selection criteria