10. COMBINING ABILITY ANALYSISFOR YIELD, ITS COMPONENTSAND PHYSIOLOGICAL TRAITS IN RICE (ORYZA SATIVAL.) UNDER SODICITY by SURESHKUMAR. M1, S.K.GANESH2, M.SAKILA3, D.DINAKARAN4 AND T.SENGUTTUVAN5

Authors

  • SURESHKUMAR. M, S.K.GANESH, M.SAKILA, D.DINAKARAN AND T.SENGUTTUVAN

Abstract

The present study was conducted to estimate combining ability, gene action
and proportional contribution of cross components in rice genotypes under
sodicity. Combining ability estimates were worked out through diallel analysis
of 30 hybrids developed by crossing six parents to know the genetic
architecture of 14 physio-morphological traits viz., days to 50 percent
flowering, plant height, number of productive tillers per plant, panicle length,
number of filled grains per panicle, spikelet fertility percentage, 100 grain
weight, single plant yield, dry root weight, dry shoot weight, root: shoot ratio,
Na+: K+ ratio, chlorophyll content and proline content under sodic
environment. Results of per se and gca effects of parents revealed that multiple
crosses involving FL 478, IW Ponni, BPT 5204, IR 64 and RNR57979 would be considered as invaluable sources of genetic materials. Considering the hybrids showing non-significant sca effects with significant favorable gca effects of parents for more than one trait, four hybrids viz., FL 478 / BPT 5204, FL 478 / RNR 57979, BPT 5204 / FL 478 and BPT 5204 / RNR 57979 were found to fulfill with the criteria advocating simple pedigree method of breeding to obtain promising segregants as the traits were governed by additive type of gene action predominantly. An outset on perusal of data for hybrids based on per se, sca effects and standard heterosis, five hybrids viz., FL 478/ IW Ponni, IW Ponni/ IR 64, IW Ponni / BPT 5204, BPT 5204 / FL 478, IW Ponni / FL 478 were found to be suitable for heterosis breeding under sodicity. As there was dominance gene action involved, inter semating followed by recombination breeding might be advocated for improvement of yield, its components and physiological traits under sodicity.
KEY WORDS: Rice, sodicity, diallel, General Combining Ability (GCA), Specific Combining Ability (SCA), additive, dominance.

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Author Biography

SURESHKUMAR. M, S.K.GANESH, M.SAKILA, D.DINAKARAN AND T.SENGUTTUVAN

COMBINING ABILITY ANALYSISFOR YIELD, ITS
COMPONENTSAND PHYSIOLOGICAL TRAITS IN RICE
(ORYZA SATIVAL.) UNDER SODICITY
SURESHKUMAR. M, S.K.GANESH, M.SAKILA,
D.DINAKARAN AND T.SENGUTTUVAN
1& 2.DEPARTMENT OF PLANT BREEDING AND GENETICS,
ANBIL DHARMALINGAM AGRICULTURAL COLLEGE AND
RESEARCH INSTITUTE, TRICHY - 620 009.
3.AGRICULTURAL COLLEGE AND RESEARCH INSTITUTE,
EACHANKOTTAI - 614 902.
4.HORTICULTURAL COLLEGE AND RESEARCH INSTITUTE
FOR WOMEN, TRICHY-620 009.
5.SOIL AND WATER MANAGEMENT RESEARCH INSTITUTE,
THANJAVUR- 613 501.
TAMIL NADU AGRICULTURAL UNIVERSITY, TAMIL NADU,
INDIA.
Corresponding author’s e-mail: manosuresh967@gmail.com

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Published

2015-12-01

How to Cite

D.DINAKARAN AND T.SENGUTTUVAN, S. M. S. M. (2015). 10. COMBINING ABILITY ANALYSISFOR YIELD, ITS COMPONENTSAND PHYSIOLOGICAL TRAITS IN RICE (ORYZA SATIVAL.) UNDER SODICITY by SURESHKUMAR. M1, S.K.GANESH2, M.SAKILA3, D.DINAKARAN4 AND T.SENGUTTUVAN5. LIFE SCIENCES LEAFLETS, 70. Retrieved from https://petsd.org/ojs/index.php/lifesciencesleaflets/article/view/973

Issue

Vol. 70 (2015): December, 2015.....ISSN 0976 - 1098(On Line) ISSN 2277 - 4297(Print)

Section

Research Paper

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