Vol. 9, Issue 10 (2020)

Author(s):
Ajay Kumar, RDS Yadav and Pankaj Kumar

Abstract:
A field experiment was carried out at Instructional Farm of Acharya Narendra Dev University of Agriculture and Technology Kumarganj, Ayodhya, U.P, India during kharif 2015 and 2017 to study the flowering behaviour and leaf growth pattern with a view to develop a technique for attaining perfect synchronization between the parental lines i.e. IR58025-A (CMS line), IR58025-B (maintainer line) and NDR 3026-3-1R (restorer line) of a promising hybrid rice NDRH2. Based on the results, it is concluded that, the synchronization of flowering between IR58025-A and IR58025-B could be obtained if second seeding of maintainer line is done on 5 days after seeding of CMS line under A×B system. Whereas, three staggered seeding is done in restorer line as; the second seedling of restorer line was done on 4^th day and third seeding on 7^th day from its first seeding under A×R system which is earlier to 9, 12 and 15 days seeding of CMS line were appropriate for attaining perfect synchronization between three line approach system (A,B and R) in hybrid rice seed production technology.