Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Asian Journal of Agricultural Research
  Year: 2016 | Volume: 10 | Issue: 2 | Page No.: 99-106
DOI: 10.3923/ajar.2016.99.106
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Combining Ability and Gene Action Studies for Heat-tolerance Physio-biochemical Traits in Tomato

Uttam Bhattarai, Pranab Talukdar, Akashi Sharma and Ranjan Das

Abstract:
High temperature disrupts normal physiological functions of plant and affects its growth and development. A 5×5 diallel cross in tomato (Lycopersicon esculentum) showed Nagcarlan to be the best combiner for heat-tolerance traits. The crosses involving high General Combining Ability (GCA) parents also showed good Specific Combining Ability (SCA) effects. Heat-tolerance traits were governed by both additive and non-additive gene action. Total chlorophyll content and nitrate reductase activity were governed by dominant gene action and had more dominant genes than recessive genes for heat tolerance. Pollen viability, relative leaf water content and chlorophyll stability index were governed by both additive and dominant gene action. These traits could be used in the pure line selection to accumulate more additive effects. The Wr-Vr graph indicated over-dominance for heat tolerance. Moderate narrow-sense heritability h2 (ns) was found for pollen viability (0.44) and total chlorophyll content (0.43). Heterosis breeding was appropriate to utilize the dominant gene action involved for heat tolerance.
PDF Fulltext XML References Citation Report Citation
How to cite this article:

Uttam Bhattarai, Pranab Talukdar, Akashi Sharma and Ranjan Das, 2016. Combining Ability and Gene Action Studies for Heat-tolerance Physio-biochemical Traits in Tomato. Asian Journal of Agricultural Research, 10: 99-106.

DOI: 10.3923/ajar.2016.99.106

URL: https://scialert.net/abstract/?doi=ajar.2016.99.106

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

Curve Bottom