International Journal of Chemical Studies
Vol. 6, Issue 2 (2018)
Heterosis studies for yield and yield components in rice hybrids using CMS System
Author(s): CH Ramesh, Dr. CH Damodar Raju, Dr. CH Surender Raju and Dr. N Rama Gopala Varma
Abstract: The present experiment was conducted to determine the extent of heterosis over better parent and standard check in order to identify promising hybrids with high mean performance and high magnitude of heterosis for yield and yield components. Three CMS lines viz., IR 58025A, IR 68897A and JMS 13A were selected and randomly crossed with eight Rajendra Nagar lines. 24 F1 s along with parents and check DRRH-3 were evaluated in Randomized Block Design (RBD) with three replications. These hybrids showed considerable variation among them for all the sixteen parameters viz., days to 50% flowering, plant height, panicle length, panicle weight, productive tillers per plant, unproductive tillers per plant, flag leaf length, flag leaf width, number of filled grains per panicle, spikelet fertility, grain yield per plant, productivity per day, 1000 grain weight, grain length, grain breadth and length-breadth ratio. Heterobeltiosis and standard heterosis were studied in 24 crosses among 16 characters. Among 24 hybrids three hybrids viz., IR 58025A x RNR 21301(34.45), JMS 13A x RNR 21604 (21.40) and JMS 13A x RNR 21218 (20.93) showed positive standard heteosis in yield over DRRH-3 check.
Pages: 76-82 | 947 Views 22 Downloads
How to cite this article:
CH Ramesh, Dr. CH Damodar Raju, Dr. CH Surender Raju, Dr. N Rama Gopala Varma. Heterosis studies for yield and yield components in rice hybrids using CMS System. Int J Chem Stud 2018;6(2):76-82.