HomeInternational Rice Research Notesvol. 23 no. 1 (1998)

Adaptability and yield of rice hybrids

M I. Ahmed | C. H M. Vijayakumar | S Singh | M S. Ramesha | B C. Viraktamath

Discipline: Agriculture, Genetics



Heterosis in rice was reported in 1926. But commercial exploitation took almost 5 decades mainly because of problems in hybrid seed production. China was the only country to commercially exploit heterosis before 1994. Recently, a few rice hybrids were released in India for commercial cultivation. Although the yield advantage of rice hybrids is well documented, doubts regarding their yield gains and adaptability over locations still persist. Therefore, we present here the average yield gains obtained from hybrids and their adaptability to locations in India. We used data from 1991 to 1995 on various hybrids tested under different trials over 12 locations in the wet season (WS) and at six locations during the dry season (DS).