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A study was conducted comprising of four widely divergent genetic materials of tomato viz. BCT- 111 rin possessing specific mutant genes and CLN B, Patharkutchi, BCT-53 are normal lines without possessing specific genes in Central Research Farm, Bidhan Chandra Krishi Viswavidyalaya, West Bengal, India during autumn-winter (2018‒19 to 2019‒20) aimed to evaluate genotype level variation due to rin gene in both homozygous and heterozygous condition for different characters. Three hybrids viz. BCT-111 rin×CLN B, BCT-111 rin×Patharkuchi, BCT-111 rin×BCT-53 were developed involving BCT-111 rin and normal 3 genotypes. The seven genotypes including the parental lines and hybrids exhibited wide range of variations in different traits namely, plant height (84.59‒106.94 cm), number of days to first flowering after transplanting (25.7‒41.26), number of flower clusters plant-1 (18.21‒25.69), number of flowers cluster-1 (5.73‒8.48), number of fruits plant-1 (49.22‒76.02), fruit weight (37.89‒97.50 g), equatorial diameter (24.71‒52.60 mm), polar diameter (26.00‒47.81 mm), locule number fruit-1 (2.48‒3.96), pericarp thickness (4.94‒6.84), fruit yield plant-1 (2.93‒4.07 kg), total soluble solids (3.95‒6.21° brix), total sugar content (1.43‒3.47%), reducing sugar (1.21%‒2.58%), titratable acidity (0.36%‒0.64%), ascorbic acid content (25.66‒34.76 mg 100 g-1 fresh weight), lycopene content (0.38‒4.16 mg 100 g-1 fresh weight) and β-carotene (0.24‒0.60 µg 100 g-1 fresh weight). In the genotype possessing the ripening inhibitor rin gene in homozygous condition, fruit did not ripe and lycopene biosynthesis was severely reduced. However, in heterozygous condition, lycopene biosynthesis was almost normal which amply justified the possibility of utilizing the genotype possessing ripening inhibitor rin gene for development of commercial hybrids of tomato. [ABSTRACT FROM AUTHOR]

The experiments were undertaken at 'C' Block Farm of Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, India during 2017-18 and 2018-19 to study the genetic variability, heritability and genetic gain of 23 onion genotypes. Twenty open-pollinated varieties, two hybrid varieties were taken under consideration with one variety taken as standard check. Characters like number of leaves at 30 DAT and 90 DAT, neck thickness, number of scales per bulb, bolters, average weight of 10 bulbs, vitamin C content, dry matter, TSS, phenol content, severity of purple blotch disease, total yield and marketable yield expressed high heritability along with high genetic gain. These traits were least influenced by environmental effect, so, additive genetic effect might be the influential factor for expression of such traits. Traits with such high heritability values gives clear indication that the variability observed was mainly under genetic control and offers ample scope and opportunities to conduct selection based on phenotypic performances for improvement in future onion breeding programme. For traits with moderate heritability viz., double bolters, pyruvic acid, total sugar, storage loss, selection would be less effective in these traits but can still be taken up. Characters plant height at 90 DAT and unmarketable yield, which expressed low heritability are governed by non-additive genes and therefore, hybridization between diverse parents will be the best strategy for their improvement. [ABSTRACT FROM AUTHOR]

Thirty five chilli genotypes were evaluated in a randomized block design at College of Horticulture, Rajendranagar, Sri Konda Laxman Telangana State Horticultural University, Hyderabad, Telangana state, India during Kharif, 2019 for seven months and at National Bureau of Plant Genetic Resources, Regional station, Rajendranagar, Hyderabad during Rabi 2019-20 for seven months to estimate genetic variability, heritability, genetic advance and genetic advance as % of mean of seventeen yield and yield related traits. For all the traits studied, the magnitude of PCV was higher than corresponding GCV. High Phenotypic coefficient of variation and genotypic coefficient of variation estimates were recorded for plant height, plant spread, fruit length, fruit diameter, number of fruits plant-1, fruit weight, fruit yield plant-1, fruit yield plot-1, ascorbic acid, capsaicin content and capsanthin content indicating the existence of wider genetic variability for these traits in the genotypes studied. High heritability was recorded for the traits Days to first flowering, Fruit length, Fruit diameter, No. of fruits plant-1, Fruit weight, Fruit yield plant-1, Fruit yield plot-1, Ascorbic acid, Chlorophyll content, Capsaicin content and Capsanthin content. High heritability coupled with high genetic advance as % mean indicates existence of additive gene action which was observed in fruit length, fruit diameter, number of fruits plant-1, fruit weight, fruit yield plant-1, fruit yield plot-1, ascorbic acid, chlorophyll content, capsaicin content and capsanthin content. Hence these traits can be improved by direct selection. [ABSTRACT FROM AUTHOR]