SCREENING OF TOMATO (Solanum lycopersicum L.) F4 MAPPING POPULATION FOR HIGH LYCOPENE CONTENT
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Date
2019-08-27
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UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK BENGALURU
Abstract
Tomato F4 mapping populations (140) exhibited wide variations for growth, yield
and biochemical traits. Higher plant height (141.8 cm) and fruit yield per plant (1182.6g)
were recorded in progeny 52. Higher primary branches per plant in progeny 3 (6.78),
maximum fruit length (7.17 cm) in progeny 83, maximum fruit width (6.22 cm) in
progeny 15 and maximum pericarp thickness (8.5 mm) was recorded in progeny 17. The
progeny 49 recorded higher fruit width (5.64 cm), higher number of fruits per plant (21)
and individual fruit weight (73.57 g) compared to average mean values. The biochemical
parameters such as lycopene content was higher in progeny 68.5 (27.18 mg/100g FW),
total carotenoid content was higher in progeny 45.3 (31.2 mg/100g FW), total phenol
content was more in progeny 101.4 (63.5 mg GAE/100g FW) and TSS content was
higher in progeny 35.4 (5.9 °Brix). Genetic variability studies revealed, higher GCV and
PCV values for individual fruit weight (38.4 and 36.3), fruit yield per plant (28.1 and
28.3), lycopene content (37.60 and 37.26) and total carotenoid content (32.11 and 30.21),
respectively. The heritability estimates were high for all the biochemical parameters
studied. Since the present study was carried out in fourth generation, the population needs
to be forwarded up to seventh generation to stabilize the growth and fruit quality traits for
further selections