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

1970 ◽  
Vol 35 (3) ◽  
pp. 367-373 ◽  
Author(s):  
MS Alam ◽  
N Sultana ◽  
S Ahmad ◽  
MM Hossain ◽  
AKMA Islam
Keyword(s):  
Fruit Set ◽  
Agricultural Research ◽  
Pollen Viability ◽  
Highest Weight ◽  
Significant Difference ◽  
Fruit Setting ◽  
Heat Tolerant ◽  
High Yields ◽  
Hybrid Lines ◽  
Number Of Branches

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

scholarly journals Performance of Some Tomato (Solanum lycopersicum L.) Genotypes in Summer and Winter Seasons

2015 ◽  
Vol 12 (2) ◽  
pp. 64-73
Author(s):  
M M Alam Patwary ◽  
M Mizanur Rahman ◽  
Shahabuddin Ahmad ◽  
M A Khaleque Miah ◽  
M H Rahman
Keyword(s):  
Solanum Lycopersicum ◽  
Fruit Set ◽  
Agricultural Research ◽  
Pollen Viability ◽  
Pollen Grains ◽  
Research Field ◽  
Research Centre ◽  
Agricultural Research Institute ◽  
Fruit Setting ◽  
Summer Fruit

An experiment was conducted at the Vegetable Research Field of Olericulture Division, Horticulture Research Centre, Bangladesh Agricultural Research Institute, Gazipur during October 2006 to March 2007 and May to September 2007 to evaluate the performance of tomato (Solanum lycopersicum) genotypes in summer and winter seasons. Early flowering was observed in summer compared to winter. Pollen viability decreased greatly during summer ranging from 30.44 % in TMS 003 to 86.08 % in C 11 compared to that in winter (70.33 % in C 61 to 100.00 % in VRT 002). Fruit set (%) markedly decreased in summer, which ranged from 4.69 % in TMS 017 to 39.15 % in C 51 while it ranged from and 49.00 % in TMS 008 to 90.01 % in HT 017 during winter. During summer, fruit set (%) exhibited positive significant and correlation with viable pollen grains (%). Yield per plant ranged from 1224 g in C 61 to 2670 g in VRT 003 and 37 g in TMS 015 to 94 g in C 11 in winter. The genotypes HT 019, C 11, C 21, C 41, C 51, HT 016 and HT 017 exhibited a considerable heat tolerance in relation to fruit setting ability. The Agriculturists 2014; 12(2) 64-73

scholarly journals Effect of plant growth regulators on two different types of eggplant flowers regarding style length and fruit setting

2021 ◽  
Vol 19 (4) ◽  
pp. e0906-e0906
Author(s):  
Sedighehsadat Khaleghi ◽  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Fruit Set ◽  
Floral Morphology ◽  
Pollen Viability ◽  
Polar Axis ◽  
Naphthaleneacetic Acid ◽  
Fruit Setting ◽  
Final Yield

Aim of study: (i) to explore differences between eggplant flowers capable of setting fruit including long (LGs) and medium style flowers (MEs) and those which suffer from severe problems with fertility and fruit setting including short style ones (SRTs); (ii) to study the effect of plant growth regulators on floral morphology and fruit setting. Area of study: Isfahan University of Technology, Isfahan, Iran, 2017 and 2018. Material and methods: First the floral morphology and initial fruit setting of 13 eggplant genotypes from Iran were investigated. Then the differences between LGs and SRTs of two genotypes were explored. Finally, the effect of 1-naphthaleneacetic acid (NAA) and spermidine (Spd) on floral morphology and initial and final fruit setting of these two genotypes was determined. Main results: Results showed SRTs were not capable of fruit setting. Compared to SRTs, LGs had larger central canals, higher protein, total sugar, reducing sugar and K concentrations, as well as longer polar axis and pollen tubes and greater pollen viability. Although 1.5 mM Spd and 20 mg L-1 NAA resulted in increasing of LGs and MEs, and also total initial fruit set, surprisingly, no significant differences were observed in the final yield and final fruit set between the control and these treatments. Researching highlights: Since the rate of fruit dropping was higher in those treatments compared to the control, plants with more SRTs likely regulate their final load by abscising their flowers, and plants with more LGs regulate them by abscising their fruits.

scholarly journals Metabolite profiling in Mango (Mangifera indica L.) pollen grains in relation to viability

2019 ◽  
Vol 14 (1) ◽  
pp. 33-42
Author(s):  
K S Shivashankara ◽  
G A Geetha ◽  
T K Roy
Keyword(s):  
Amino Acids ◽  
Fruit Set ◽  
Mangifera Indica ◽  
Pollen Viability ◽  
Pollen Grains ◽  
Free Sugars ◽  
Fruit Drop ◽  
Fruit Setting ◽  
Viability Percentage ◽  
Pollination And Fertilization

Mango productivity is affected mainly by irregular flowering, proportion of bisexual flowers, poor pollination and fertilization and fruit drop. Poor fruit set in some of the varieties may be associated with the lower pollen viability. The present experiment was initiated to assess the viability of pollen grains and their metabolites in three mango cultivars Amrapali, Alphonso and Totapuri which are differing in their fruit set intensity. The profiling of sugars, amino acids and some of the phytohormones were analysed using Liquid Chromatography-Mass Spectrometry (LC-MS/MS). Assessment of pollen grains in three mango cultivars indicated that free sugars such as fructose and glucose, and available amino acids including serine, proline, lysine, phenylalanine, alanine and glutamic acid were predominantly higher in all the cultivars. Phytohormones like IAA, IBA, ABA, GA,zeatin, jasmonic acid and salicylic acid were significantly different in low fruit setting cultivars Alphonso and Totapuri compared to high fruit setting cultivar Amrapali. In cv. Alphonso all the metabolites were higher at anthesis but later decreased drastically compared to cvs. Totapuri and Amrapali. Pollen viability percentage was significantly higher in cv. Amrapali than in cvs. Totapuri, Alphonso. Among all the cultivars, Amrapali maintained better chemical composition at anthesis and also at two hours after anthesis compared to cvs. Totapuri and Alphonso.

scholarly journals Study of heterosis in heat tolerant tomato (Solanum lycopersicum) during summer

2013 ◽  
Vol 38 (3) ◽  
pp. 531-544 ◽  
Author(s):  
MM Alam Patwary ◽  
M Mizanur Rahman ◽  
Shahabuddin Ahmad ◽  
MA Khaleque Miah ◽  
Haimonti Barua
Keyword(s):  
Shelf Life ◽  
Fruit Set ◽  
Agricultural Research ◽  
Research Field ◽  
Agricultural Research Institute ◽  
Cross Combination ◽  
Flower Production ◽  
Heat Tolerant ◽  
The Cross ◽  
Positive Heterosis

An experiment was conducted at the Vegetable Research Field of Olericulture Division, Horticulture Research Cente, Bangladesh Agricultural Research Institute (BARI), Gazipur during May to October 2008 to study heterosis using eight parents viz., P1, P2, P3, P4, P5, P6, P7, and P8. Most of the combinations showed better parent heterosis for earliness. Eight crosses showed positive heterosis for flower production. The highest heterotic effect for fruit set (%) was found in the cross P6 × P7 (62.59%) followed by that in P7 × P8 (60.49%) and P1 × P7 (40.00%). For fruits per plant, 8 crosses provided more than 15 % heterosis over better parent. Considering fruit yield per plant, higher degree of heterosis was manifested by 24 hybrids over better parent ranging from 13.58 to 282.63 %. Cross combination P4 x P7 showed the maximum significant positive heterosis followed by P6 x P7 (187.84 %), P4 x P8 (166.97 %), P3 x P7 (146.08 %), P3 xP6 (103.92 %), and P1 X P7 (100.45 %) and the minimum in P4 x P6 (13.58 %). For viable pollens, P3 x P5 (20.56 %) exhibited the highest positive heterosis. In case of shelf life, the highest heterosis was observed by the cross P3 x P6 (22.78 %) followed by that in P4 x P6 (22.29 %) and P2 x P6 (14.40 %). For fruit flesh thickness, 12 hybrids exhibited more than 10 % heterosis. Pollen tubes as well as viable pollens showed positive correlation with fruit set. DOI: http://dx.doi.org/10.3329/bjar.v38i3.16980 Bangladesh J. Agril. Res. 38(3): 531-544, September 2013

scholarly journals Evaluation of stability and adapbility of heat-tolerant rice lines in Mekong delta

2019 ◽  
Vol 18 (4) ◽  
pp. 1-9
Author(s):  
Lot V. Tran
Keyword(s):  
Heat Tolerance ◽  
Block Design ◽  
Mekong Delta ◽  
Environment Interaction ◽  
Rice Line ◽  
Randomized Complete Block Design ◽  
Heat Tolerant ◽  
High Yields ◽  
Hybrid Lines ◽  
Good Heat

In two crop seasons of 2018, Winter-Spring and Summer-Autumn, in Long An, Can Tho, Hau Giang, An Giang and Tra Vinh provinces, an assessment of stability and adapability of heat-tolerant rice lines (HTL) was conducted. The experiment was performed as a randomized complete block design (RCBD) with 3 replicates. The quantity of fertilizers was equally applied for all treatments, including 100 kg N, 40 P2O5 and 30 kg K2O/ha. The results showed that HTL1, HTL2, HTL5, HTL7, and HTL8 were promising hybrid lines as they had short growth periods and high yields with good heat-tolerance. These rice lines were adapted well to both Winter-Spring and Summer-Autumn crops as indicated by the analysis of rice line and environment interaction.

scholarly journals Yield Performance of Heat Tolerant & Early Maturing Wheat Varieties in Chattogram Region

2021 ◽  
pp. 82-96
Keyword(s):  
Agricultural Research ◽  
Block Design ◽  
Cost Ratio ◽  
Research Station ◽  
Wheat Varieties ◽  
Benefit Cost Ratio ◽  
Significant Difference ◽  
Early Maturing ◽  
Heat Tolerant ◽  
Benefit Cost

The experiment was conducted in two consecutive crop seasons (2015-16 and 2016-17) at Regional Agricultural Research Station (RARS), Hathazari, Chattogram during Rabi season (November to March) with 3 duplicate laid out Randomized Complete Block Design (RCBD) to compare the rehearsal of high-placed outcome, early maturing and heat tolerant varieties under increasing temperature. BARI released early maturing wheat varieties were used for optimum sowing time and heat tolerance as an adaptive mechanism suffering from terminal heat stress. Six heat-tolerant early maturing wheat varieties were (BARI Gom 25, BARI Gom 26, BARI Gom 27, BARI Gom 28, BARI Gom 29, and BARI Gom 30). The highest crop output was gained from BARI Gom 30 (4.33 t/ha) followed by BARI Gom 26 (4.06 t/ha) in a couple of years. The lowest yield was found from BARI Gom 27 (2.66t/ha) followed by BARI Gom 29 (3.53 t/ha), BARI Gom 28 (3.36 t/ha), and BARI Gom 25 (3.13 t/ha) both years. Crop output of wheat and amount of spike showed significant difference and rest of the parameters were insignificant. The earliest maturing variety was BARI Gom 30 and produced a maximum crop yield than others. BARI Gom 30 showed a maximum benefit-cost ratio (BCR) of 1.73 and BARI Gom 27exhibited the lowest benefit-cost ratio (BCR) of 1.06. This result of the experiment showed that early high yielding variety and the best adaptive variety was BARI Gom 30 among the six varieties in Chattogram.

scholarly journals Pollen Viability and Fruit Set of Tomato Genotypes under Optimumand High-temperature Regimes

HortScience ◽  
1995 ◽  
Vol 30 (1) ◽  
pp. 115-117 ◽  
Author(s):  
Aref A. Abdul-Baki ◽  
John R. Stommel
Keyword(s):  
High Temperature ◽  
Fruit Set ◽  
Pollen Viability ◽  
High Temperature Stress ◽  
Optimum Temperature ◽  
Temperature Regimes ◽  
Before And After ◽  
Heat Tolerant ◽  
Tomato Genotypes

Heat-tolerant and -sensitive Lycopersicon esculentum Mill. and L. pimpinellifolium (Jusl.) Mill. genotypes were grown in the greenhouse under optimum- (27/23C, day/night) and high-temperature (35/23C) stress regimes. Heat tolerance levels in the genotypes were established by determining percent fruit set at high and optimum temperatures. Under optimum temperature, fruit set ranged from 41% to 84% and from 45% to 91% in the heat-sensitive and heat-tolerant genotypes, respectively. Under high temperature, no fruit set in the most heat-sensitive genotypes. Fruit set in the heat-tolerant genotypes ranged from 45% to 65%. In vitro germination and tube growth of pollen taken from genotypes grown under optimum temperature conditions were determined before and after subjecting the pollen to 45C for 1, 2, and 4 hours. The response of pollen to heat treatments was genotype dependent and not a general predictor of fruit set under high-temperature stress.

scholarly journals Effect of Plant Growth Regulator on the Growth and High Yield of Heat Tolerant Tomato Variety (Lycopersicon esculentum Mill)

2019 ◽  
pp. 30-43 ◽  
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Fruit Set ◽  
Positive Impact ◽  
Pollen Viability ◽  
Block Design ◽  
High Yield ◽  
Tomato Production ◽  
Heat Tolerant

An investigation was undertaken with a view to observing the performance of two heat-tolerant varieties of tomato under polytunnel with and without plant growth regulator application during the summer rainy season. The present study was laid out in a Randomized Completely Block Design (RCBD) with three replications. Two heat-tolerant tomato varieties Bangladesh Agriculture Research Institute (BARI) Tomato-4, and BARI Hybrid Tomato-4 with and without plant growth regulator applications were included in this experiment. The larger fruit set percentage (42.52%) was observed from BARI Hybrid Tomato-4 which was also larger in case of pollen viability (42.75%), the figure of fruits every cluster (3.01), figure of fruits every plant (12.70), and yield every plant (460 g). Better yield was showed in spraying of 4-CPA at 40 ppm concentration in respect of percent fruit set (45.38%), figure of fruits every plant (16.45), and yield (39.39 t/ha) under high-temperature condition. In integrate treatment, BARI Hybrid Tomato-4 with 40 ppm 4-CPA performed a significant role in the figure of fruits every cluster (3.41), figure of fruits every plant (22.48), figure of fruits every plot (144.00), yield every plant (621.68 g), yield every plot (15.23 kg) and above all fruit yield (50.57 t/ha). This indicates that there is a bright scope of tomato production during summer through with and without plant yield regulator application, though the application of plant growth regulator had a positive impact on tomato yield.

scholarly journals Production and Viability of Pollen and Pollen-Ovule Ratios in Four Rabbiteye Blueberry Cultivars

2006 ◽  
Vol 131 (2) ◽  
pp. 181-184 ◽  
Author(s):  
Patricio A. Brevis ◽  
D. Scott NeSmith ◽  
Hazel Y. Wetzstein ◽  
Dorothy B. Hausman
Keyword(s):  
Fruit Set ◽  
High Efficiency ◽  
Pollen Viability ◽  
Reproductive Failure ◽  
Pollen Production ◽  
Vaccinium Ashei ◽  
Significant Difference ◽  
Total Pollen ◽  
Pollen Release

Fruit set of rabbiteye blueberries (Vaccinium ashei Reade) can be pollen-limited under certain conditions. The objective of this study was to determine production, release, and viability of pollen, as well as pollen-ovule ratios in the rabbiteye blueberry cultivars Austin, Brightwell, Climax, and Tifblue. In vitro tetrad germination varied among genotypes, although, values were high (≥80%) in all cultivars. Pollen viability does not seem to contribute to reproductive failure in the cultivars studied. Total pollen production per flower averaged 8434 tetrads across all cultivars. On a per ovule basis, pollen production was very low relative to other xenogamous species. The low pollen-ovule ratio of rabbiteye blueberry (≈400) may be an indicator of the high efficiency of its pollen dispensing mechanism. Total pollen production varied among cultivars. Furthermore, a significant difference in pollen release was found between two cultivars with similar total pollen production per flower. The possible mechanism regulating pollen release in these cultivars is discussed.

Study on Pollination Characteristics and Hybrid Offspring Analysis on Hickory (Carya cathayensis)

2012 ◽  
Vol 610-613 ◽  
pp. 3289-3297
Author(s):  
Zheng Jia Wang ◽  
Ian Qin Huang ◽  
You Jun Huang ◽  
Bing Zhang ◽  
Bing Song Zheng
Keyword(s):  
Fruit Set ◽  
Female Parent ◽  
Female Flower ◽  
Phenotypic Characteristics ◽  
Ornamental Tree ◽  
Significant Difference ◽  
Fruit Setting ◽  
Different Types ◽  
Carya Cathayensis

Hickory (Carya cathayensis) is an important ornamental tree in China. Crossbreeding is carried out with hickory as female parent, pollinating with pecan (C. illinoensis) pollen and other different types of pollen treatments. Fruit set percentage, fruits and seeds characters, pollen germination in vitro and situ and identification of seedling using AFLP and RAPD are studied in order to get pollination characteristics on hickory. The results showed that hickory and pecan pollens were not germination on 14 different components media. Hickory pollens start germinating on the female flower stigma pollinated after 8 h and universal after 24 h using Scanning electron microscopy (SEM). There is a small amount of fruits under cover treatment, without-pollination treatment and 2, 4-D treatment. The rate of fruit setting is the biggest up to 42.2% when female flowers are pollinated with mixed pollen within populations on hickory. Among harvested fruits and seeds, fruit phenotypic characteristics show large variation when pollinating with pecan. Fruits and seeds weight and size are significant difference comparing with the control. The frequency of polyembryony is about 9.04%. Offsprings of C. cathayensis × C. illinoensis are not true hybrids using AFLP and RAPD analysis. The variation of fruits is due to xenia effect. These results suggested that apomixis mechanism might exist on hickory.

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