Genetic Behaviour of Some Rice (Oryza sativa L.) Genotypes Under Different Treatments of Nitrogen Levels

Metwally, T.F.
Sedeek, S.E.M.
Abdelkhalik, A.F.
El-Rewiny, I.M.
Ehab. M.R. Metwali
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Abstract

The present investigation was carried out at the experimental farm of Rice Research and Training Center, Sakha, Kafer ElSheikh, Egypt during 2008 and 2009 seasons to study the physio-morphological behaviour of some rice genotypes under low and high nitrogen application. Twenty one genotypes were tested under three different nitrogen levels viz, 0, 75 and 150 kg N/ha for ten traits viz, flag leaf area, chlorophyll content, days to heading, panicle weight, , no. of filled grains/panicle, no. of panicles/plant ,1000-grain weight, grain yield t ha-1, grain yield efficiency index (GYEI) and agronomic nitrogen use efficiency (ANUE). The genotypes were divided into three groups i.e., japonica/japonica (J/J), japonica/indica japonica (J/IJ) and indica japonica/indica japonica (IJ/IJ). GZ6296 x Giza178-1 and GZ6296 x Giza 178-3 gave the highest values of no. of filled grain/panicle and no. of panicles/hill under low input of nitrogen. Giza177/Sakha101 and Giza176/GZ6944 (J/J) gave the highest grain yield under low input of nitrogen followed by the genotypes derived from Giza178/GZ6296 (IJ/IJ). 

Keywords Rice (Oryza Sativa L.), genotypes, nitrogen, physio-morphological traits, low input, ANUE, GYEI, cluster analysis.
Published 22/05/26