The Effect of Mutagenic Sodium Azide and Row Spacing on Improvement of Cowpea (Vigna sinensis L.)Production

M. A. Al-Anbary

Abstract


A research was conducted at the experimental station, Agriculture College, Kerbala University, Iraq, during 2009-2011,in order to improve Rahhawiya genotype(Local cultivar) using mutagen sodium azide in two concentrations(0.03 and 0.06%) and determine the suitable row spacing. Genotypes (Rahhawiya treated with 0.03% sodium azide , Rahhawiya treated with 0.06% sodium azide , in addition to Rahhawiya, and two American cultivars Type5 black eye and Ramshorn as controls) were planted on Row spacing(25,50 and 75)cm. The results showed that Rahhawiya 0.03% was higher in all field studied characteristics, excluding number of seeds/pod . Furthermore the same genotype gave higher seed yield for second and third mutant generations (843.90 and 1030.00Kg/ha), respectively. The suitable row spacing was produced from 25cm in plant height(cm),leaf area index , number of pods/m2 ,100 seed weight and biomass yield and its resulting higher seed yield for second and third mutant generations (879.90 and 991.40Kg/ha) respectively. Number of pods per plant and number of pods per square meter gave a highest genotypic and phenotypic correlation with seed yield and for this we can use them as a best selection indicators.

Keywords


Cowpea, Genotypes, Row Spacing, Genotypic and Phenotypic Correlations

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