Article Id: ARCC4818 | Page : 92 - 94
Citation :- BASIS FOR CONSTITUTING BASE POPULATION IN SUNFLOWER (H. ANNUUS L.).Agricultural Science Digest.2003.(23):92 - 94
D. Roy and M. Tariq Ali
Address : Department of Genetics and Plant Breeding, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, India


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.


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