Inter-relationship and Cause Effect Analysis among Drought and Physiological Traits in Three Line Aerobic Rice Hybrids  

Sathya Ramalingam , Jebaraj S.
Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Maduraia, 625104, India;
Author    Correspondence author
Plant Gene and Trait, 2013, Vol. 4, No. 13   doi: 10.5376/pgt.2013.04.0013
Received: 31 May, 2013    Accepted: 12 Jul., 2013    Published: 20 Aug., 2013
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This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Sathya and Jebaraj., 2013, Inter-Relationship and Cause Effect Analysis among Drought and Physiological Traits in Three Line Aerobic Rice Hybrids, Plant Gene and Trait, Vol.4, No.13 70-73 (doi: 10.5376/pgt.2013.04.0013)

Abstract

Path analysis helps to study the association between drought tolerant and yield related traits by partitioning of genotypic correlation coefficients of different characters on single plant yield to direct and indirect effects. The trait, proline content expressed high direct effect and harvest index had moderate direct effect on single plant yield. The traits panicle length and harvest index had high indirect effects on single plant yield through proline content. Likewise, filled grains per panicle, productive tillers per plant, 100 grain weight and harvest index showed moderate indirect effects through proline content. The traits panicle length, proline content expressed low indirect effects through harvest index. These characters have to be given importance for enhancing yield under drought condition.

Keywords
Oryza sativa; Drought; Path analysis; Direct and indirect effect
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