PATH ANALYSIS IN RAINFED UPLAND RICE (Oryza sativa.L) UNDER NATURAL STRESS

KRANTIKUMAR .H. PATIL; C. LEKHA RANI; LEENAKUMARY; S; ROY STEPHEN; VIJAYARAGHAVAKUMAR; V.G. JAYALEKSHMY

Volume : V, Issue : V, May - 2016

PATH ANALYSIS IN RAINFED UPLAND RICE (Oryza sativa.L) UNDER NATURAL STRESS

Krantikumar . H. Patil, C. Lekha Rani, Leenakumary, S, Roy Stephen, Vijayaraghavakumar, V. G. Jayalekshmy

Abstract :

A study of path analysis was carried out using twenty rice varieties under natural moisture stress. Path analysis revealed that the biological yield per plant (1.07715) had the highest positive direct effect on grain yield followed by harvest index (0.36397), 1000 seed weight (0.26241), number of spikelets per panicle (0.24955), days to 50% flowering (0.12013), plant height at tip of leaf (0.03614) and filled grain per panicle (0.0055). Positive direct effects of these traits on grain yield indicated their importance in determining this complex character and therefore, should be kept in mind while practicing selection aimed at the improvement of grain yield. Present path analysis for grain yield indicated that biological yield was the major contributor in terms of direct effect and indirect effects on grain yield per plant at genotypic levels so that this particular trait should be considered when eeding program for higher grain yield in rice are to be planned.