Vol. 12, Issue 5 (2023)

Author(s):
Y Madhavi, RVSK Reddy and C Sreenivasa Reddy

Abstract:
A set of 18 F1 hybrids developed as a result of line x tester mating design involving six lines and three testers were evaluated in randomized block design in three replications for heterosis in tomato quality characters. Heterosis to the extent of -25.71, 35.03, 69.02, 52.66 and 57.91 over mid parent and -32.47, 31.76, 44.33, 33.18 and 56.95 over better parent was recorded for titrable acidity, total carotenoid content, reducing sugars, total sugars and lycopene content respectively. Standard heterosis over Lakshmi to the extent of -22.56, 45.66, 53.56, 66.14 and 73.62 was recorded for titrable acidity, total carotenoid content, reducing sugars, total sugars and lycopene content respectively and over US-618 to the extent of -18.25, 59.80, 66.57, 50.30 and 88.67 was recorded for titrable acidity, total carotenoid content, reducing sugars, total sugars and lycopene content respectively. The crosses viz., LE-64 × Punjab Chhuhara, LE-62 × Punjab Chhuhara, LE-62 × Punjab Chhuhara and LE-56 × Punjab Chhuhara exhibited highest standard heterosis for total carotenoid content, reducing sugars, total sugars and lycopene content, respectively. Hence, these are suitable for quality improvement through heterosis breeding.