Abstract
Tomato production in Pakistan faces significant problems of low yields due to various biotic and abiotic stresses primarily because of a narrow genetic base of the cultivars being used. Therefore, Introduction and evaluation of the exotic tomato germplasm has become necessary to acquire elite material to develop future breeding programs. To this end, the present study was conducted for the phenotypic characterization of twenty exotic tomato genotypes along with two locally grown cultivars in semi-arid subtropical climate. Data were collected for morphological, fruit quality and fruit yield traits. A significant (p<0.05) phenotypic variation was observed for all the studied traits. Maximum yield was obtained from “Rober” i.e., 1508.31 g per plant. The maximum shelf life was observed in the Cromco, with the least weight loss (2.45%) and loss in the firmness of fruit (22.61%) in 4 days. Correlation analyses revealed a strong genetic association among morphological and yield related traits. High estimates of the heritability (ranged from 79.77% to 95.01% for different traits), along with a high genetic advance (up to 34%) showed the potential usefulness of these traits and genotypes to develop breeding programs to improve the tomato yield and fruit quality.
Highlights
Tomato (Solanum lycopersicum L.) belongs to the family Solanaceae, and is an important horticultural crop grown worldwide for its human consumption
Maximum plant height was observed in F4T5 (ISL) (256.33 cm) and Cromco (254.67cm) and their height correspond to indeterminate growth habit
The least leaf area was observed in Allround and Centennial as 2.42 mm2 and 1.86 mm2 respectively (Table 1)
Summary
Tomato (Solanum lycopersicum L.) belongs to the family Solanaceae, and is an important horticultural crop grown worldwide for its human consumption. S. lycopersicum is the second most-consumed vegetable crop of Pakistan after potato [2, 3] It is cultivated all over this country due to its adaptability to wide range of climate and soil [4]. It is a perennial plant, but it is cultivated annually in Pakistan due to its higher economic and commercial advantages [1].
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