Study of genenetic parame and path coeffeiciend analysis under difference nitrogen fertilizer rates in growth , yield and yield corn ponont of semi daworf and tall rice varities | ||
| Euphrates Journal of Agriculture Science | ||
| Article 1, Volume 6, Issue 2, April 2014, Pages 171-182 | ||
| Abstract | ||
| Abstract: An Experiment were condacte in AL-Muskab Rice Research satation during 2009 to study some genetic parameters of rice semi dwarf and long varities and path coefficient analysis , growth , yield and yield component under different nitrogen rates . The desigh was spilt plot with RCBD arrangement in three replicates . Nitrogen rates ( 100 , 120 , 140 , 200 and 240 kg / ha ) were sub plots , while Rice varities ( 8 ) were main plots . The statical analysis showed that increase rates of N led to significant increase in leaf area index dry matter , plant height , number of panicales / m2 , grain weight , paddy yield , panicale length , number of panicale in / m2 , number of inactive tiller / m2 , number of grain , panicale and harvest index . Varities showed highly signigicant differences in all characterizes a highest . The semi dwarf var. gave highest IAI , PM panicale lenghth , higher panielle , length panicle number of grain panicles , harvest index , , paeldy yield , sifficant interaction were obtainted in most characters studied . Phenotypic coefficient of variation around 5.9 – 56.4 , and genotypic coefficient of variation around 5.8 – 55 % . Heritability in abroad sense around 0.73 – 0.99 . High coheritability for yield was obtained number of panicales / m2 , number og grains panicales and harvest index were paddy yield . Path coefficient analysis showed that LAI from nitrogen rate 150 Kg N / ha and plant height at 100 Kg N / ha were gave higher positive direct effect | ||
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