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The mutated locus and the changes in the background genotype of jute (C. olitorius L.)

S P Sinhamahapatra¹, S C Rakshit

¹Department of Genetics & Plant Breeding, Bidhan Chandra Krishi Viswa Vidyalaya, Kalyani, India.

TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik

|November 27, 2013

Abstract:

Morphologically similar leaf characters of two X-ray induced and independently isolated jute mutants from a common mother cultivar, JRO-632, were controlled by the same locus. However, they differed significantly in such quantitative characters as plant height, middle diameter, days to flower, node number and fibre yield/plant. Combining ability analysis from a 9 X 9 diallel set of crossing including these two mutants revealed that the mutants significantly differed in general combining ability (gca) effects for most of the traits in either direction or magnitude. Specific combining ability (sca) effects of the inter-mutant cross, as well as crosses with the common mother cultivar, JRO-632, also differed for most of the traits studied. It was suggested that X-irradiation induced random mutations effecting changes in the common background genotype, independent of the mutated locus.

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