Genetic Diversity Analysis of Oryza glaberrima Derived Introgression Lines under Direct Seeded Condition
B. K. Nikhil *
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India and Department of Genetics and Plant Breeding, College of Agriculture, PJTSAU, Hyderabad, Telangana, India.
S. P. Prem Sagar
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India and Department of Genetics and Plant Breeding, University of Agricultural Sciences, Raichur-584104, Karnataka, India.
J. Suresh
Department of Genetics and Plant Breeding, College of Agriculture, PJTSAU, Hyderabad, Telangana, India.
V. Swathy
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
Aleena
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
Ch. Ravindra
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
S. C. Manoj Kumar
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
Manasani Prashanath
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
Anantha Siddaiah Madhyavenkatapura
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
Kalyani M. Barbadikar
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
Ponnuvel Senguttuvel
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
A. V. S. R. Swamy
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
Raman Meenakshi Sundaram
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
Channappa Gireesh
Indian Council of Agricultural Research (ICAR), Indian Institute of Rice Research (IIRR), India.
*Author to whom correspondence should be addressed.
Abstract
The increasing water scarcity and labour wages have led to the search for alternative crop establishment in rice, such as direct seeded rice (DSR). DSR can reduce unproductive water flow, reduce labour requirements, and mitigate greenhouse gas emissions. Genetic diversity was assessed for hundred and three rice introgression lines using Mahalanobis’ D2 analysis and Tochers’ clustering method. Cluster I had the largest number of genotypes (73), tailed by Cluster II with 15 genotypes. Cluster III and IV had the maximum intra-cluster distances, with Cluster IV having a significant number for desirable characters. The results disclosed that days to 50% flowering, tailed by plant height contributed much to diversity. The most significant inter-cluster distances were found in Clusters involving III and IV, II and III, I and IV and II and IV. These introgression lines can be utilised in crosses, resulting in fruitful recombination during the selection process.
Keywords: Direct Seeded Rice (DSR), diversity, introgression lines, Oryza glaberrima