EXPLOITATION OF HETEROSIS FOR YIELD AND YIELD CONTRIBUTING TRAITS IN TOMATO (LYCOPERSICONESCULENTUM MILL.)

摘要

Eighteen pure lines of tomato were crossed with two testers. The resulting thirty six F, hybrids along with twenty parents were tested for heterosis. The cross FT-5 x V-16 showed significant heterosis over better parent for number of fruits per cluster and number of fruits per plant. However, the cross 102 x 101 recorded the highest significant heterobeltiosis for fruit yield per plant followed by FT-5 x V-16 and 187 x V-16. Highest significant negative heterobeltiosis effects for days to first flowering was observed in BT-12-2-1 x V-16. Significant heterosis over better parent for fruit weight and total soluble solids was recorded in cross combination 187 x 101. Out of thirty six hybrid combinations, twenty two showed significant heterobeltiosis for plant height. However, the highest heterobeltiosis effect for harvest duration was observed in cross 1874 x 101. These crosses may be exploited for the development of superior hybrids of tomato.