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Agricultural Science Digest, volume 23 issue 2 (june 2003) : 92 - 94

BASIS FOR CONSTITUTING BASE POPULATION IN SUNFLOWER (H. ANNUUS L.)

D. Roy, M. Tariq Ali

Affiliations

¹Department of Genetics and Plant Breeding, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, India

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Cite article:- Roy D., Ali Tariq M. (2025). BASIS FOR CONSTITUTING BASE POPULATION IN SUNFLOWER (H. ANNUUS L.). Agricultural Science Digest. 23(2): 92 - 94. doi: .

ABSTRACT

D2-analysis of eighteen hybrids resulted in eight clusters, one comprising of seven hybrids, four clusters containing two hybrids each and three clusters, each containing one hybrid. All the hybrid varieties within a cluster can be crossed inter se and the resulting population (intra-cluster crosses) can be used for starting recurrent selection for achieving short term objectives whereas the populations, cross of hybrids from different clusters can be used as broad base population for achieving long term objectives. Cluster numbers IV, V, III, VII and VIII showed the highest inter-cluster distance and thus inter-cluster crosses are expected to generate higher variation of non-additive type. Cluster number V showed maximum divergence from other clusters and it contains two hybrids which have shown susceptibility to chcrrcoal rot (Macrophomina phaseoli) which appeared for the first time in summer sunflower crop at Pantnagar.

KEYWORDS

REFERENCES

Hallauer, AR. and Miranda EO. (1981). Quantitative Genetics in Maize Breeding, Iowa State University Press Ames, Iowa.
Mahalanobis, P.C. (1936). On generalized dis~nce in statistics. Proc. Nat. Inst. Sci.. India. pp. 12-49.
Rao, C.R. (1952). Advanced statistical method~ in biometric-research. John Willey and Sons, Inc. New Delhi.
Roy, D. (2000). Plant Breeding - Analysis and Exploitation of Variation. Narosa Publishing House, New Delhi.

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