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Variability in Vegetative and Reproductive Characters for the Identification of Develped Mutants of Groundnut/peanut

M. M. A. Mondal
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, P.O. Box No.4, Mymensingh.

M.A. Hamid
Plant Breeding & Genetics Division, Bangladesh Institute of Nuclear Agriculture, P.O. Box No.4, Mymensingh.

Abstract/ Executive Summary:

Twenty eight established groundnut mutants and two check cultivars were studied during Kharif-I seasons of 1995 and 1996 to find their variability and distinct character (s) as identifying keys. All the mutant genotypes showed erect type sequential branching habits with two seeds in each pod although they had shown significant variability in all the vegetative and reproductive structures. Twenty three mutant genotypes grouped into intermediate type of the extremes in any given identifying key characteristics. Mutants M₆/36-24 and M₆/61-6 had two buds/racem, D/24-29 had the longest primary branch length and highest number of secondary branches and Zhinga Badam with three seeds/pod showed distinct identifying features of all the studied genotypes.

Keywords: Variabiliy, Identification, Groundnut, Peanut

Location: Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh

Start Date: 00-00-1995

End Date: 00-00-1996

Program Area: Variety and Species

Commodity: Ground nut

Objectives:

To precisely assess differences in the vegetative and reproductive characters amongst 28 elite mutants and two check cultivars for framing keys of future identifying strategies of groundnut.

Methodology:

Two pot experiments were conducted at the Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh during Kharif-I seasons of 1995 and 1996. Twenty eight mutants developed at BINA and two released varieties belonging to spanish group were studied. Randomized complete block design was used in both the experiments, with 3 replications. Eight kilogram sandy loam soils were used as growth medium in each pot (30 cm x 35 cm) after well mixing thoroughly with urea, triple super phosphate and muriate of potash at the rate of 0.75, 1.5 and 1.2 g/pot corresponding to 50, 150 and 120 kg/ha, respectively. Five seeds of each genotype were sown in each pot at a depth of 3 cm on 15 April, 1995 and 10 March, 1996. Finally, they were thinned to one seedling after 15 days of emergence. Intercultural Operations, such as watering, weeding etc. were done as and when necessary. All the plants of the mutants/cultivars were harvested at a time, 135 and 130 days after sowing for experiment-l and -2, respectively. Data on different vegetative and reproductive characters were recorded from the experiments following standard techniques and were subjected to appropriate statistical analysis.

Source of Information: Bangladesh Journal of Nuclear Agriculture. Vol: 16 & 17, pp: 67-75, 2001

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Based on the vegetative and reproductive structures. The highest number of mutant genotypes was placed in the intermediate scales in any of the key identifying traits, whilst only few in the highest and lowest scale extremes. The latter extremes are actually very important keys in distinguishing the genotypes. Only single genotype of the whole lot had shown distinctively the longest primary branch and highest secondary branch number (D₁/24-29), highest primary branch number M₆/7-25), highest leaflet length (Dhaka-1) and highest seeds/pod. In contrast, only two mutants of the lot had shown distinctive shortest plant height.

Knowledge Management: Journal