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International Journal of Applied Agricultural & Horticultural Sciences
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DOI Prefix : 10.37322
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Vol. 2 (6) : November-December 2011 issue
Green Farming Vol. 2 (6) : 645-648 (November-December, 2011) (New Series)
Path of productivity analysis for grain yield in single cross hybrids of maize (Zea mays L.)
R. PAVANa1*, P.I. GANGASHETTYb2 and SATEESH ADIGERb2
aAICRP on Forage Crops, ZARS, V.C. Farm, Mandya - 571 405 (Karnataka)
bDeptt. of Genetics and Plant Breeding, University of Agricultural Sciences, Dharwad - 580 005 (Karnataka)
Designation :  
1Sr. Res. Fellow *(pavan55agri@rediffmail.com), 2,3Student (Genetics & Plant Breeding)
Subject : Crop Genetics and Plant Breeding
Paper No. :
Total Pages : 4
Received :
Revised accepted :
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Citation :

R. PAVAN, P.I. GANGASHETTY and SATEESH ADIGER. 2011. Path of productivity analysis for grain yield in single cross hybrids of maize (Zea mays L.). Green Farming Vol. 2 (6) : 645-648  (November-December, 2011) (New Series)

ABSTRACT
The yield is a complex trait, which is highly influenced by the environment and hence indirect selection through component traits would be an advisable strategy to increase the efficiency of selection. Path of productivity analysis in maize (Zea mays L.) was studied during 2008-09 for grain yield and its component traits in top ten progenies selected based on their per se performance from 87 single cross hybrids developed by crossing twenty nine newly developed inbred lines from the National Yellow Pool with three testers in a line x tester analysis. The variance among the lines was highly significant for all the traits, whereas variance among testers was significant for number of kernels per row, 100-grain weight, grain yield per plant, fodder yield and grain yield per hectare. The variance due to line x tester interaction was significant for all the traits except ear length, ear circumference, shelling percent and fodder yield indicating differential response of lines with different testers. Among the top ten hybrids selected based on the yield performance almost all the hybrids exhibited below average expression for the characters days to 50 per cent tasseling, days to 50 per cent silking and fodder yield because these characters are negatively contributes to yield. The deviation being positive or negative would reflect on the nature of genes ultimately contributing towards yield.
Key words :
Line x tester analysis, maize, national yellow pool, path of productivity, Zea mays.