A study was conducted to estimate heterosis of 21 tomato cross combinations involving seven parents at the experimental field of Olericulture Division of HRC, BARI during the winter season of [2005][2006]. Analysis of variance indicated highly significant differences for all the characters suggesting the presence of genetic variability among the studied materials. Three combinations (P2 × P3, P3 × P4, P3 × P5) showed significant early flowering, while two P1 × P7 (16.67%) and P1 × P2 (12.44%) for individual fruit weight. In the study, the cross combinations P4 × P7 (62.31%), P2 × P6 (37.44%), P4 × P6 (34.77%), P2 × P7 (33.67%), P3 × P7 (32.09%), and P3 × P4 (29.82%) manifested higher heterosis over better parent for yield per plant.

The investigation was conducted at the Olericulture Division, Bangladesh Agricultural Research Institute and the laboratory work was done at Vegetable Research Technology Section, Institute of Food Science and Technology, Bangladesh Council of Scientific and Industrial Research, Dhaka, Bangladesh during 2019-20 with ten types (Six- OP, four- Hybrid) of eggplant cultivar viz., BARI Begun-4, BARI Begun-6, BARI Begun- 8, BARI Begun-10, BARI Hybrid Begun-2, BARI Hybrid Begun-4, SM233, SM275, Hybrid 5x216 and Hybrid 21x11 to study the nutritional composition and its human health benefit. Eggplant is ranked amongst the most top ten vegetables that provide the healthiest food with low calories and also contain high phenolic contents that are helpful in radical absorbing capacity. Each vegetable contains a unique amount of various nutrients that are strongly linked with the protection of different health diseases. There were no significant differences among the six OP and four hybrid cultivars regarding yield. Fruit yield was more or less the same but the main differences were in fruit size and color as well as fruit shape. We got the moisture content (91.39-94.87%, crude fiber (1.01-2.48%), ash (0.37-0.62%), protein  (0.85-1.54%), fat  (0.02-0.4%), carbohydrate  (4.27-6.63%), energy (19.59-32.1Kcal), sugar (0.48-1.38%), ascorbic acid (6.57-17.21 mg 100g-1), anthocyanin (6.31-78.51 mgC3GE 100g-1). Significant amount of mineral were present in eggplant cultivars viz., K (122.38-162.27mg 100g-1), Na (4.06-8.51 mg 100g-1),  Ca (26.62-48.33 mg 100g-1), P (14.45-23.45 mg 100g-1), Mg (15.42-24.8 mg 100g-1), Fe (0.91-5.0mg 100g-1), Zn (0.22-0.57mg 100g-1), Mn (0.25-0.41mg 100g-1) and Cu (0.10-0.16mg 100g-1). These nutritional amounts will able to provide a significant amount of nutrition to the human body for the proper growth. These compounds were found helpful in the cure of various diseases like cancer, anti-inflammatory, anti-asthmatic, anti-platelet hypo-lipidemic, and hypotensive, etc. Today most modern scientific techniques are available to cure different various health problems but still majority of the population across the globe depends upon the vegetables sources nutritious food.

The experiment was conducted at the experimental farm of Olericulture Division, Horticulture Research Centre, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur from May to August 2003. Combining ability effects were estimated for yield and component traits in a 8 x 8 diallel design excluding reciprocals in tomato. The variances for general combining ability (GCA) and specific combining ability (SCA) were highly significant indicating the presence of additive as well as non-additive gene effects in the traits studied. The relative magnitude of these variances indicated that additive gene effects were more prominent for all the characters under study. The tomato genotype P1 (TM051) proved to be the best general combiner for yield followed by P2 (TM053) and the combinations P 1 xP 3 , P 1 xP 5 and P 5 xP 7 were identified as the best specific combiner for earliness, yield per plant, number of fruits per plant and individual fruit weight.

The study was carried out to estimate magnitude of heterosis over better parent and standard check for some important characters in 15 crosses resulting from a half diallel mating design of 6 inbred lines of brinjal. Hybrid variety 'Tarapuri' was used as standard check. The parents and the hybrids were evaluated at the farm of Olericulture Division, HRC, BARI, during the winter season of 2008-2009. A randomized complete block design with three replications was used. Significant levels of heterosis were detected for all the traits studied. Promising hybrids exhibited significant positive heterosis for fruit yield, magnitude of which ranged from 9.63% to 74.89% and 8.52% to 72.60% over better parent and standard check, respectively. Some of the promising hybrids showed desirable heterosis for earliness, increased fruit number and yield. Keywords: Heterosis; productive traits; brinjal; hybrid. DOI: 10.3329/agric.v8i2.7571 The Agriculturists 8(2): 8-13 (2010)

A field experiment on okra taking the variety BARI Dharos-1 with four nitrogen levels (0, 75, 125 and 175 kg/ha) (Tk.193.56/ha), net return (Tk.126.35/ha) and maximum BCR of 2.88.