Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Genetic Analysis of Quantitative Characters of in Heat Tolerant Tomato (solanum Lycopersicum L.)

S. Ahmad
Olericulture Division, Horticultural Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701, Bangladesh

M. M. Rahman
Olericulture Division, Horticultural Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701, Bangladesh

A. K. M. Quamruzzaman
Olericulture Division, Horticultural Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701, Bangladesh

M. N. Uddin
Olericulture Division, Horticultural Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

Genetic analysis for days to 50% flowering, flowers per cluster, percent fruit set, fruit clusters per plant, fruits per plant, individual fruit weight, fruit yield per plant, fruit length, fruit diameter, branches per plant, plant height, seeds per fruit, percent brixs and percent viable pollen grain in tomato (Solanum lycopersicum L.) were studied. In Wr/Vr graph the slope of the regression line was significantly below from 1.0, suggesting significant non-allelic interaction for all the characters. A simple additive genetic system with incomplete dominance or partial dominance was observed for flowers per cluster, percent fruit set, individual fruit weight, fruit length, branches per plant and percent viable pollen grain. An additive genetic system with complete dominance for days to 50% flowering, fruit clusters per plant, fruits per plant, fruit yield per plant, fruit diameter, plant height, seeds per fruit and percent brixs.

Keywords: Gene action, Parental mean graph, Yield and yield contributing character, Heat tolerant tomato

Location: The experimental farm of Olericulture Division, HRC, Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur

Start Date: 00-07-2006

End Date: 00-11-2006

Program Area: Variety and Species

Commodity: Tomato

Objectives:

To determine the mode of gene action in governing characters under high temperature stress

Methodology:

The experiment was conducted at the experimental farm of Olericulture Division, HRC, Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur during the month of July to November 2006. The average minimum and maximum temperature during the crop period was 25.470C and 32.160C respectively. The mean minimum and maximum relative humidity was 80.26% and 93.31% respectively. A diallel cross of 8 x 8 excluding reciprocals were constructed from the eight parental lines viz., P₁ (TM051), P₂ (TM053), P₃ (TM017), P₄(TM026), P₅(TM025), P₆ (TM041), P₇ (TM044), P₈ (TM002). Seeds of the eight selfed parents and their twenty-eight F₁ hybrids were sown in seed bed on 16^th July May 2006. Then at the age of 35 days, seedlings were transplanted in the main experimental plots. The experiment was set up in a randomized complete block design (RCBD) with four replications. Thirty-six genotypes (28 F1`s + 8 parents) of tomato were considered as the 36 treatments of the experiment. The unit plot size was 5.0 x 1.0 m and the plants were spaced 50 cm on row. Each unit plot contained single row accommodating 10 plants where data were collected from randomly selected 5 plants leaving 2 border plants. The experimental plots were covered by transparent polytuunel with minimum interruption of photosynthesis. The poly tuunels were 2.3 meter wide having two 1.0 meter wide bed with 30 cm drain in between, which serves as irrigation channel. The tunnels were used to protect the plants from high rainfall. All the sides of tunnel were open for good aeration. The recommended dosage and method of application of manure and fertilizers were used. Weeding and mulching was done followed by top-dressing and irrigation was applied at 15 days interval. Five plants were selected randomly from each unit plot. Data on days to 50% flowering, flowers per cluster, fruit set (%), fruit clusters per plant, fruits per plant, individual fruit weight (g), yield per plant (g), fruit length (cm), fruit diameter (cm), branches per plant, plant height (cm), seeds per fruit, brix (%) and viable pollen grain (%) were recorded. All the quantitative data taken were subjected to ANOVA. The total variances of each character were partitioned into block, genotype and error differences. The differences within the classes of effects were tested by F-test. Combining ability analysis of the traits with significant genotypic differences was done according to the Model 1 and Method 2 of Griffing (1956 a, b). The fixed effect model was more appropriate in the present case since the parents selected were self-pollinated lines and the parents and F1s were the populations considered. This analysis partitioned the variation due to genotypic differences into general combining ability (GCA) and specific combining ability (SCA) effects.

Source of Information: J. Innov. Dev. Strategy, 4(1):27-33 ( 2010)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Parent P₈with the most dominant alleles had represented the low scoring parent and parent P₁ with most recessive alleles had represented the high scoring parent and was revealed that the dominance was conditioned by recessive alleles.

Knowledge Management: Journal