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Path coefficient analysis for the yield components of rice cultivars in Iran under different nitrogen levels

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Research Paper 01/10/2013
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Path coefficient analysis for the yield components of rice cultivars in Iran under different nitrogen levels

Ebrahim Azarpour
J. Bio. Env. Sci.3( 10), 24-30, October 2013.
Certificate: JBES 2013 [Generate Certificate]
Key: CorrelationPath analysisRiceStepwise regression

Abstract

In order to determine the relationships among yield and yield components in rice (Oryza sativa L.), an experiment as factorial in RCBD with three replications was conducted during 2009 year in the Rice Research Institute, Iran, Rasht, central of Guilan and Rudsar, East of Guilan. Factors were cultivar (Khazar, Ali Kazemi and Hashemi), and nitrogen fertilizer levels (0, 30, 60, and 90 Kg N/ha). Results showed that grain yield in rice had significant and positive correlation at 1% with panicle weight (r = 0.96) and biological yield (r = 0.71). Results of path coefficient analysis showed that, number of grain and number of panicle had the highest and positive effect on grain yield. The direct effects of number of grain and number of panicle on grain yield were 1.135 and 0.711 receptivity.

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