Genetic Divergence Studies in Pigeonpea [Cajanus cajan (L.) Millsp.]

Praveen Pandey, Rajesh Kumar, Vankat Raman Pandey, Mritunjay Tripathi

Department of Biochemistry, Narendra Deva University of Agriculture and Technology, Kumarganj, India.
Department of Genetics and Plant Breeding, Narendra Deva University of Agriculture and Technology, Kumarganj, India.

DOI: 10.4236/ajps.2013.411264                

Abstract

The nature and extent of genetic diversity were assessed among 23 parents of pigeonpea hybrids employing Mahalanobis D² statistics. Based on relative magnitude of D², the genotypes were grouped into five different non-overlapping clusters. Cluster III, having 8 genotypes, emerged with highest number of entries; cluster I, II and V were constituted by four genotypes each while cluster IV, comprising three genotypes, had least number of entries. The highest contribution in manifestation of genetic divergence was exhibited by 100-seed weight followed by pods per plant, days to maturity, harvest index, biological yield per plant, days to 50% flowering and seed yield per plant. The maximum intra-cluster distance was observed for cluster III, followed by cluster IV, cluster I and cluster V. The highest inter-cluster distance was recorded between cluster II and IV followed by cluster I and IV and cluster V and II. The crossing between entries belonging to cluster pairs having large inter-cluster distance and possessing high cluster means for one or other characters to be improved may be recommended for isolating desirable recombinants in the segregating generations in pigeonpea. Considering the mean performance for different characters of genotypes belonging to diverse clusters, the promising genotypes identified were NDA 2, NDA 7-11, IPA 208 and NDA 5-14 of cluster I; NDA 3-3, NDA 98-6, Amar and NDACMS 1-3A of cluster II; NDACMS 1-4A, NDACMS 1-6A and ICP 870 of cluster IV and NDA 96-6, ICP 2155, NDA 8-6 and NDAGC 1010 of cluster V for exploitation as parents in hybridization programme for development of superior pigeonpea hybrid cultivars.

Keywords

Pigeonpea; Genetic Diversity; Clustering Pattern; Polygenic Traits

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	C. Darwin, “The Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life,” Philosophical Library, New York, 1859.
[2]	R. N. Moll, W. S. Sathawana and H. F. Robinson, “Heterosis and Genetic Diversity in Varietal Crosses of Maize,” Crop Science, Vol. 2, No. 3, 1962, pp. 197-198. http://dx.doi.org/10.2135/cropsci1962.0011183X000200030005x
[3]	V. Arunachalam, “Genetic Distance in Plant Breeding,” Indian Journal of Genetics and Plant Breeding, Vol. 41, No. 2, 1981, pp. 226-236.
[4]	M. N. Sawant, A. H. Sonone and S. A. Anarase, “Character Association, Path Coefficient Analysis and Genetic Diversity in Pigeonpea,” Journal of Maharashtra Agricultural Universities, Vol. 34, No. 2, 2009, pp. 134-137.
[5]	D. Bhadru, “Genetic Studies in Pigeonpea [Cajanus cajan (L.) Millsp],” Electronic Journal of Plant Breeding, Vol. 1, No. 2, 2011, pp. 132-134.
[6]	N. Pratap, R. Kumar, S. N. Singh, R. J. Singh and H. R. Verma,”Genetic Divergence in Pigeonpea Collections,” Agricultural and Biological Research, Vol. 27, No. 1, 2011, pp. 14-19.
[7]	B. R. Murty and V. Arunachalam, “The Nature of Genetic Divergence in Relation to Breeding System in Crop Plants,” Indian Journal of Genetics and Plant Breeding, Vol. 26, No. A, 1966, pp. 188-198.
[8]	G. M. Bhatt, “Multivariate Analysis Approach to Selection of Parents for Hybridization Aiming at Yield Improvement in Self Pollinated Crops,” Australian Journal of Agricultural Research, Vol. 21, No. 1, 1970, pp. 1-7. http://dx.doi.org/10.1071/AR9700001
[9]	V. G. Panse and P. V. Shukhatme, “Statistical Methods for Agricultural Workers,” 2nd Edition, ICAR, New Delhi, 1967, pp. 152-157.
[10]	P. C. Mahalanobis, “On the Generalized Distance in Statistics,” Proceedings of National Institute of Sciences (India), Vol. 2, No. 1, 1936, pp. 49-55.
[11]	C. R. Rao, “Advanced Statistical Methods in Biometric Research,” John Wiley and Sons, New York, 1952.
[12]	P. K. Katiyar, R. P. Dua, I. P. Singh, B. B. Singh and F. Singh, “Multivariate Analysis for Genetic Diversity in Early Pigeonpea Accessions,” Legume Research, Vol. 27, No. 3, 2004, pp. 164-170.
[13]	S. K. Gupta, J. S. Sandhu, S. Singh and R. P. Dua, “Assessment of Genetic Diversity in Pigeonpea [Cajanus cajan (L.) Millsp.],” Crop Improvement, Vol. 35, No. 2, 2008, pp. 142-145.
[14]	Y. K. Nag and R. N. Sharma, “Genetic Diversity and Path Coefficient Analysis in Pigeonpea [Cajanus cajan (L.) Millsp.] Germplasm Accessions of Bastar Origin,” Electronic Journal of Plant Breeding, Vol. 3, No. 2, 2012, pp. 818-824.
[15]	R. N. De, J. N. Reddy, A. V. S. Rao and K. K. Mohanty, “Genetic Divergence in Early Rice under Two Situation,” Indian Journal of Genetics and Plant Breeding, Vol. 52, No. 3, 1992, pp. 225-229.