GENETIC AND ASSOCIATION STUDIES IN SEGREGATING POPULATIONS FOR YIELD AND FREE THRESHABILITY TRAIT IN TETRAPLOID WHEAT

C.H. NAGARAJU¹*, S.S. BIRADAR², S.A. DESAI³, V. RUDRA NAIK⁴, C.K. CHETHANA⁵, T.N. SATHISHA^6
1Dr. Sanjay Rajaram Wheat Laboratory, AICRP on Wheat, Main Agricultural Research Station, University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India.
²Dr. Sanjay Rajaram Wheat Laboratory, AICRP on Wheat, Main Agricultural Research Station, University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India.
³Dr. Sanjay Rajaram Wheat Laboratory, AICRP on Wheat, Main Agricultural Research Station, University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India.
⁴Dr. Sanjay Rajaram Wheat Laboratory, AICRP on Wheat, Main Agricultural Research Station, University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India.
⁵Dr. Sanjay Rajaram Wheat Laboratory, AICRP on Wheat, Main Agricultural Research Station, University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India.
⁶Dr. Sanjay Rajaram Wheat Laboratory, AICRP on Wheat, Main Agricultural Research Station, University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India.
* Corresponding Author : nagchilukuri4519@gmail.com

Received : 03-03-2015     Accepted : 05-05-2015     Published : 02-06-2015
Volume : 7     Issue : 2       Pages : 430 - 433
Int J Agr Sci 7.2 (2015):430-433

Keywords : Correlation, Heritability, Variation, Freethreshability, Dicoccum wheat
Academic Editor : Dr S.a. Felitti, Wu-yun Yang
Conflict of Interest : None declared

In the present study two free threshable mutant lines derieved from interspecific hybradization followed by mutation were used to generate F2 populations involving non free threshable dicoccum variety (DDK-1025) and analyzing genetic parameters like genetic variability, heritability, genetic advance and associations. The cross DDK-1025 x ML-1 exhibited considarable variation for traits like plant height, tiller number, spikelets per spike, grain yield per plant, threshability and presence of rachis and number of grains per spike, spike density and thousand grains in cross DDK-1025 x ML-2 exhibited had high mean values. Most of the traits recorded higher values for phenotypic coefficient of variation followed by genotypic coefficient of variation and high heritability estimates coupled with high genetic advance. The nature of association of yield and its attributes was similar in both the crosses, except for few characters viz., number of grains per spike with plant height. It was noticed strong association between threshability and presence of rachis in both the crosses.