Heterosis for grain yield in rice (Oryza sativa) under coastal salinity condition

The present experiment was undertaken with line x tester mating design involving 12 testers (male) and 4 lines (female) to identify the best heterotic combinations. Pooled analysis of heterotic combinations for grain yield revealed range from-20.92% (NAUR 1 x GR 11) to 26.43% (NAUR 1 x CSR 27) for average heterosis, -28.99% (NAUR 1 x GR 11) to 19.87% (GAR 13 x NVSR 6108) for heterobeltiosis, and-11.03 (NAUR 1 x GR 11) to 49.91% (NAUR 1 x CSR 27). Further, based on pooled analysis, best crosses with more than 30% heterosis were NAUR 1 x CSR 27 (49.91%), NAUR 1 x Dandi (48.98%), Panvel 1 x NVSR 6108 (35.93%), NAUR 1 x IR 76346-B-B-10-1-1-1 (33.73%), NAUR 1 x NVSR 6100 (32.62%), Panvel 1 x Dandi (32.56%) and NAUR 1 x NVSR 6108 (32.33%) over check CST 7–1.