Selection of superior lentil (Lens esculenta M.) genotypes by assessing character association and genetic diversity.

U K Nath,B Horneburg,M N Alam,Santona Rani,M R Paul

doi:10.1155/2014/372405

U K Nath, B Horneburg + Show 3 more

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https://doi.org/10.1155/2014/372405

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Abstract

Lentil is one of the most important pulse crops in the world as well as in Bangladesh. It is now considered a main component for training and body building practising in first world countries. Yield varies tremendously from year to year and location to location. Therefore, it is very important to find genotypes that perform consistently well even in ecological farming systems without any intercultural operations. Twenty lentil genotypes were tested during the period from November 2010 to March 2011 and from December 2011 to March 2012 with three replicates in each season to determine genetic variability, diversity, characters association, and selection indices for better grain yield. The experiment was conducted at the breeding field of the Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh. This study revealed that all the genotypes possess a high amount of genetic diversity. Plant height and 100-grain weight showed significant positive correlation with grain yield plant−1 that was also confirmed by path analysis as the highest direct effect on grain yield. The genotypes BM-513 and BM-941 were found to be the best performer in both the seasons and were considered as consistent genotype. The genotypes were grouped into four clusters based on Euclidean distance following Ward's method and RAPD analysis. However, discriminant function analysis revealed a progressive increase in the efficiency of selection and BM-70 ranked as the best followed by the genotypes BM-739, BM-680, BM-185, and BM-513. These genotypes might be recommended for farmers' cultivation in ecological farming in Bangladesh.

Highlights

Lentil (Lens esculenta M.) is one of the most important pulse crops
Grain yield was positively correlated with plant height (r = 0.44∗) and 100-grain weight (r = 0.56∗); this was confirmed by the direct effect of path coefficient analysis (Table 2)
Correlation and path analysis revealed that plant height and 100-grain weight had a major contribution to increasing yield of lentil in ecological farming

Summary

Introduction

Lentil (Lens esculenta M.) is one of the most important pulse crops. It is cultivated in many parts of the world covering tropical, subtropical, and temperate regions. The development of genotypes with good, stable yield and higher protein content is important to improve the yield status of lentil. The yield potential of this crop needs to be improved through an effective plant breeding program. The environment has much influence on the productivity of lentil genotypes. Direct selection for grain yield is often misleading because it is influenced by component characters. Grain yield depends on a number of yield contributing characters. Yield along with its contributing characters should be considered in determining the selection criteria for yield improvement. The success of breeding programs depends upon the amount of genetic variability present in the population and the extent to which the desirable traits are heritable

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Conclusion