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Genetic Variability in Advanced Generations of Vegetable Pea (pisum Sativum L.)

Asfakun Siddika
Scientific Officer
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

A. K. M. Aminul Islam
Assistant Professor
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

M. Golam Rasul
Assistant Professor
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

M. Abdul Khaleque Mian
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

Jalal Uddin Ahmed
Professor
Department of Crop Botany, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

Abstract/ Executive Summary:

An experiment was undertaken to study genetic variability and character association in 26 advanced lines of vegetable pea (Pisum sativum L.) based on eight characters. Among twenty six advanced lines twelve obtained from the cross between Edible Podded Pea and IPSA Motorsuty-1, nine obtained from the cross between Local White and IPSA Motorsuty-3 and five parental lines were included to measure genetic variability. The field experiment was conducted at the research farm, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh. Analysis of variance showed significant differences among the genotypes for all characters. Phenotypic coefficients of variation (PCV) was close to genotypic coefficients of variation (GCV) for all the characters except branches per plant, seeds per pod, pods per plant, 100-seed weight and seed yield per plant. High heritability associated with high genetic advance was observed for plant height, pod length and seed yield per plot. Significant positive genotypic and phenotypic correlation between seed yield per plant and days to 50% harvest, pod length, pod breadth and seeds per pod were observed. Path coefficient analysis revealed that days to 50% flowering, days to 50% harvest, number of branches per plant, pods per plant, seeds per plant and 100-seed weight had positive direct effect on seed yield per plant.

Keywords: Vegetable pea, Heritability, Genetic advance, Character association

Location: Field laboratory, Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Vegetables

Objectives:

To study genetic variability and character association in 26 advanced lines of vegetable pea (Pisum sativum L.) based on eight characters.

Methodology:

The experiment was conducted at the field laboratory, Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh during the winter season (November to March). The experimental materials were included five varieties (IPSA-1, IPSA-2, IPSA-3, BARI-1 and Local white), 12 advanced lines obtained from cross Edible Podded Pea × IPSA Motorsuty-1 (L-19, L-95, L-128, L-227, L-145, L-195, L-252, L-20, L-92,L-160, L-141 and L-72) and nine advanced lines obtained from cross Local white × IPSA Motorsuty-3 {L-120, L-20, L-105, L-247, L-26, L-244, L-142 (tall) and L-142 (short)}. The seeds were sown in the field and seedlings were emerged five to twelve days after seed sowing. The experiment was conducted using the Randomized Complete Block Design (RCBD) with three replications. The unit plot size was 50 m × 4 m with a row-to-row distance of 50 cm and a plant-to-plant distance of 20 cm. Each plot consisted of 78 rows and plot to plot distance was 0.5 meter. The unit plots were fertilized with cow dung, urea, TSP and MP at 10 t, 45 kg, 62.5 kg, 50 kg per ha, respectively. The entire cow dung, TSP, MP and half of the urea were applied at the time of final land preparation. The remaining half of urea was applied as top dressing in two installments. First top dressing was done at 21 days after and second at 42 days after sowing. Data were noted on individual plant basis from eight randomly selected competitive plants. Days to 50% flowering (DFPF), days to 50% harvesting (DFPH), plant height (PH), pod length (PL), pod breadth (PB), pods per plant (PPP), 100-green seed weight (HGSW), and seed yield per plant (SYPP). The mean, range and standard deviation (x) for each character have been calculated and analysis of variance for each of the character was performed. The mean square (MS) at error and phenotypic variances were estimated. Genotypic and phenotypic co-efficient of variation was calculated by the formula. Broad sense heritability was estimated by the following formula. The expected genetic advance for different characters under selection was estimated using the formula. Genotypic and phenotypic correlation coefficients were measured with the formula. Correlation coefficient was further partitioned into components of direct and indirect effects by path coefficient analysis.

Source of Information: International Journal of Plant Breeding 7 (2), 124-128, 2013

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

High heritability coupled with high genetic advance and high genetic advance in percent mean were observed in plant height, 100 seed weight, seed yield per plant and yield per plot. Hence, yield improvement in pea would be achieved through selection of these characters. 2) The characters days to 50% harvest, pod length, pod breadth, seeds per pod showed positive and significant correlation with seed yield per plant. This result suggested that seed yield per plant can be increased by improving this characters. 3) 50% flowering, days to 50% harvest, branches per plant, pods per plant, seeds per pod and 100-seed weight showed positive direct effect on yield. So yield improvement is associated with these characters.

Knowledge Management: Journal