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Mixing Ability and Inter-genotypic Competition from Unblends and Biblends of Five Lentil (lens Culinaris Medik) Cultivars

F. Mahmud
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University Dhaka-1207, Bangladesh

M. Z. Ullah
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University Dhaka-1207, Bangladesh

J. Rahman
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University Dhaka-1207, Bangladesh

K. M. K. Huda
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University Dhaka-1207, Bangladesh

Abstract/ Executive Summary:

Mixing ability in lentil (Lens culinaris Medik) was studied in 5x5 mechanical diallel mixtures excluding reciprocals. Variances due to general mixing ability (GMA) and specific mixing ability (SMA) were significant for all the characters except plant height and plant spread in case of SMA and primary branches/plant and biological yield/plant in both the cases. Parent BARlmasur-4 was found to be a good general mixer for most of the characters, viz., yield/plant, seeds/plant, harvest index, 1000- seed weight, pods/plant and secondary branches/plant. The biblend BARlmasur-1 + BINAmasur-l was found to be a good specific mixer for days to maturity, yield/plant, seeds/plant, plant spread, harvest index, pods/plant and secondary branches/plant. The performance of biblend Barimasur-3 + Binamasur-l was the same for seed yield along with harvest index, 1000-seed weight, seeds/plant, pods/plant, primary branches/plant and days to maturity. Although varietal mixtures are not an alternative to pure culture, they nevertheless exhibit better performance under any adverse condition.

Keywords: Lentil, Uniblend, Biblend, Mixing ability, Mechanical diallel

Location: Sher-e-Bangla Agricultural University, Dhaka.

Start Date: 00-11-2004

End Date: 00-03-2005

Program Area: Variety and Species

Commodity: Lentil

Objectives:

To see the effect of diallel analysis for estimating mixing ability effects of parents and mixtures and for identifying desirable genotypes for synthesizing promising varietal mixtures in lentil.

Methodology:

Five released varieties of lentil, viz., BARlmasur-l, BARlmasur-2, BARlmasur-3, BARlmasur-4 and BINAmasur-1 were mixed in a 1: 1 ratio by number of seeds to produce a total of ten biblends. These biblends together with five components were grown at the experimental field of Sher-e-Bangla Agricultural University, Dhaka during November 2004 to March 2005 in a RCB design with three replications. Each of the fifteen treatments was planted in a four-row plot, 3 m long with row to row distance of 30 cm. Ten and twenty randomly selected competitive plants from each of the parents and mixtures, respectively were tagged for recording observations on eleven characteristics, viz, days to maturity, plant spread, plant height, primary branches/plant, secondary branches/plant, pods/plant, seeds/plant, seed yield/plant, 1000- seed weight and harvest index. The plot means were subjected to mixing ability analysis in the same fashion as combining ability analysis of lines in hybrid combination using method 2, model 1 of Grifting.

Source of Information: The Agriculturists, Vol: 4, (No-1&2), pp: 47-52, Dec 2006

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Since farmers, traders and consumers would prefer uniformity in many of the characters of cultivars, only synthesis of mixtures of two components with characters similar in terms of maturity, growth habit, plant height, seed size, testa and cotyledon colour need to be considered. Results form this investigation clearly show that certain varietal mixtures have substantial advantages over their respective components as well as the standard cultivars. Therefore, to overcome the problems of low and unstable yield in lentil, the differential responses of genotypes can be used by synthesizing mixtures of genotypes provided the commercial product is more or less homogeneous.

Knowledge Management: Journal