Performance of heat tolerant tomato hybrid lines under hot, humid conditions

Abstract

Eight hybrid tomato lines bred for heat tolerance by the Olericulture Division, BARI were studied to observe their fruit setting ability and yield performance under the hot, humid conditions at the Olericulture Farm of Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during summer 2005. Percent fruit set in the lines was found to be within the range of 30 to 45 except C-7 (3×7) in which this was 52.85. The tallest plants having larger number of branches and the lowest flower drop were also observed in C-7 (3×7). Pollen viability ranged from 27.63 to 61.52 percent among the hybrids. The highest weight of individual fruits (56.02 g) and firmness (1.41 kg) was observed in C-5 (2×5). The largest fruit in respect of length and diameter was produced by C-8 (5x5). No significant variation was found among the lines in respect of days to 50% flowering and percent TSS. Significant difference wa observed for fruit number per plant ranging from 27 to 51. All of the lines produced remarkably high yields and C-7 (3x7) gave the highest yield per plant (1.73 kg) as well as per hectare (41.5 tons). The highest gross return (1867500 Tk/ha) and the maximum net return (1486748 Tk/ha) having the highest BCR (3.90) were recorded in C-7 (3×7). Keywords: Heat tolerant; tomato hybrid; hot; humid. DOI: 10.3329/bjar.v35i3.6442Bangladesh J. Agril. Res. 35(3) : 367-373

Evaluation of Tomato (Solanum lycopersicon L.) Hybrids for Fruit Yield Characters in Hill Region of Uttarakhand, India

“…The population mean for this trait was 11.48. The results of present investigation could also be compared with findings of Sekhar et al, (2009) (19.47 to 36.27), Alam et al, (2010) from (5.7 to 7.5) and Singh et al, (2014) (6.00 to 8.33) in tomato hybrids (Table 1).…”

“…Variability in number of branches in tomato hybrids have also been reported by Alam et al, (2010) (Table 2).…”

“…Variability in days to first picking has also been observed by Alam et al, (2010) from 89 to 99 DAT and Sharma et al, (2013) from 62 to 82 DAT in tomato hybrids.…”

“…Fruit set percentage in tomato is one of the important parameter for the rainy season tomato yield in hills, which is also a measurement of a particular hybrid/variety towards tolerance to low temperature and high rainfall. In the most of cases, fruit setting ability of a particular hybrid/variety determines ultimate fruit yield in tomato (Alam et al, 2010 andSingh et al, 2014). While studying the performance of tomato hybrids, Alam et al, (2010) also reported a range of fruit set percentage from 32.96% to 52.86%, Similarly Singh et al, (2014) reported highest fruit set in cultivar Laxmi (80.50%) and lowest in PS-61 (50.65%) ( Table 1).…”

“…Variable plant height of different hybrids was mainly due to differences in their genetic make-up. Variability in plant height at flowering and fruiting has also been obtained by Alam et al, (2010) from 115.9 cm to 139.5 cm, Ali et al, (2012) from 56.82 cm to 72.00 cm, Shankar et al, (2013) from 48.33 cm to 153.63 cm, Sharma et al, (2013) from 57.9 cm to 162.39 cm, Singh et al, (2013) 53.73 cm to 83.67 cm and Saleem et al, (2013) from 76 cm to 126 cm in hybrid tomatoes.…”