Vol. 5 (6) : November-December 2014 issue
Green Farming Vol. 5 (6) : 946-950 ; November-December, 2014
DUS testing and genetic diversity analysis of rice (Oryza sativa L.) varieties using morphological descriptors
G. RAGHAVENDRA1*, S. THIRUMENI2, K. PARAMASIVAM3, T. SOMASEKAR4 and K. TIRUMALESH5
Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal - 609 603 Tamil Nadu Agriculture University, Coimbatore (Tamil Nadu)
Designation : 1Res. Officer *(raghav2kumar@gmail.com), 2Professor, 3Professor & Head, 4,5Res. Officer
Subject : Crop Genetics and Plant Breeding
Paper No. : P-1824
Total Pages : 5
Received : 14 April 2014
Revised accepted : 29 October 2014
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Citation :
G. RAGHAVENDRA, S. THIRUMENI, K. PARAMASIVAM, T. SOMASEKAR and K. TIRUMALESH. 2014. DUS testing and genetic diversity analysis of rice (Oryza sativa L.) varieties using morphological descriptors. Green Farming Vol. 5 (6) : 946-950 ; November-December, 2014
ABSTRACT
The objective of present study was to make use of efficient morphological descriptors to reveal the genetic relationships of rice varieties. A set of 66 rice varieties was analyzed using 27 morphological descriptors showed 11 higher diversity indices, of these only one could be recorded in vegetative stage while remaining 10 could be scored only during post-flowering. Genetic similarities among genotypes varied from 0.11 to 1.0 with an average of 0.36. The cluster analysis grouped all the genotypes into two major clusters at 0.21 level of genetic similarity. The first three principal coordinates explained more than 0.84 of total genetic variation. This approach demonstrates the effective use of DUS testing in varietal identification.
Key words :
Cluster analysis, Dus testing, Morphological, Descriptors, Diversity indices,Genetic similarity, Principle coordinate.
