| dc.description | .Tomato (Lycopersicon esculentum (L.) Wettsd; 2n=24) is one of the most popular and
widely grown vegetables in the world. It is a versatile vegetable for culinary purpose.
Ripe tomato fruit is consumed fresh as salad and utilized in the preparation of range of
processed products such as powder, puree, ketchup, sauce, soup, canned fruit. Unripe
green fruits are used for preparation of pickles and chutney. Tomatoes are important
source of lycopene (Antioxidant) vitamin A, vitamin C and minerals.
1.1 Origin and Distribution of tomato
Tomato belongs to the family Solanaceae and genus Lycopersicon. The genus includes
twelve species, all originating in the South America. Among these species, only two
Lycopersicon esculentum the cultivated tomato and L. pimpinellifolium, a small fruited
tomato have been recognized as edible (Chaudhury, 1979). L. esculenium, the cultivated
tomato, was originated in Peruvian and Mexican regions (Rick and Butler, 1956). It was
introduced into European countries by the Italians in the sixteenth century (McCue.
1952). It is believed that this vegetable was introduced into Indian sub-continent during
the British regime though there is no definite record on when and how it came into this
region. | en_US |
| dc.description.abstract | The experiment was conducted during the period of November 2011 to April 2012 at the
experimental form of the Department of Genetics and Plant Breeding, Hajee Mohammad Danesh
Science and Technology University, Dinajpur. It involved 7 varieties of tomato from different
local markets in Dinajpur. It was carried out to study their performance, genetic variability,
heritability, genetic advance, correlation and path co-efficient analysis of yield and yield
contributing characters of the varieties. Data were recorded on days to 50% flowering, fruit
diameter, fruit length, fruit weight, plant height, canopy width, number of fruits per plant, 1000-
seed weight, shelf life and yield per plant. Highly significant variation for all the characters was
observed among the variety studied. It was observed among the variety studied. It was observed
that fruit diameter, fruit length, fruit weight, plant height, canopy width, number of fruits per
plant, 1000-seed weight, shelf life exhibited high heritability. But days to 50% flowering and
yield per plant showed medium heritability. But days to 50% flowering and yield per plant
showed medium heritability. High phenotypic variance was observed for fruit diameter, fruit
weight, canopy width and number of fruits per plant while high phenotypic co-efficient of
variation were observed for fruit weight, canopy width, number of fruits per plant and shelf life.
Estimates of genetic advance in percentage of mean where moderate for the characters fruit
length, fruit diameter, plant height, 1000-seed weight and yield per plant. Days to 50% flowering
showed low and fruit weight, number of fruits per plant, shelf life showed high genetic advance
in percentage of mean. Correlation co-efficient indicated that weight of individual fruit had
highly significant positive relationship with fruit diameter. The character, canopy width showed a
positive and significant relationship with plant height. But Number of fruits per plant and yield
per plant exhibited negative and significant relationship with fruit weight and 1000-seed weight.
Path co-efficient analysis indicated that among the different yield contributing characters number
of fruits per plant and fruit diameter had maximum direct effect on yield per plant. Fruit length
had also high direct effect on yield per plant. Fruit length had also high direct effect to yield per
plant. The characters days to 50% flowering, fruit weight, plant height, shelf life showed direct
positive effect and canopy width and 1000-seed weight exhibited negative direct effect to yield
per plant. | en_US |
