Abstract
For the study of genetic variability and correlation analysis among grain yield and its contributing traits an experiment was conducted in the research area of Department of Plant Breeding and Genetics, University of Agriculture Faisalabad, Pakistan during crop season of 2011. The heritability was found 96.06 to 99.99% while genetic advance was from 15.939 to 63.439%. Significant genotypic correlation was found for grain yield per plant with stem diameter, cob diameter, cob length, cob weight, 100-seed weight, dry matter yield, leaves per plant, chlorophyll contents, grain rows per cob and cobs per plant. It was accomplished that higher heritability and genetic advance was found. It was suggested that selection of higher grain yielding genotypes may be helpful to enhance crop yield and productivity. Key words: Zea mays, heritability, genetic advance, genotypic, phenotypic, correlation.
Highlights
Maize (Zea mays L) is an imperative cereal food crop all over the world with extra impact for developing countries like Pakistan
Significant genotypic correlation was found for grain yield per plant with stem diameter, cob diameter, cob length, cob weight, 100-seed weight, dry matter yield, leaves per plant, chlorophyll contents, grain rows per cob and cobs per plant
The data of 10 randomly selected plants were recorded for stem diameter, cob diameter, cob length measured by vernier caliper (Model RS232), plant height measured by using meter rod, cob weight, 100-seed weight, grain yield per plant, dry matter yield, stover weight measured with the help of electronic balance (OHAUSGT4000, USA), chlorophyll contents by using chlorophyll meter, grain rows per cob, leaves per plant and cobs per plant
Summary
Maize (Zea mays L) is an imperative cereal food crop all over the world with extra impact for developing countries like Pakistan. Maize is the third essential cereal in Pakistan following to wheat and rice It contributes 5.67% in the worth of agriculture outputs. Maize is dilapidated as food for human while feed for livestock and worn as an industrial raw material to produce various types of byproducts. It has highest 9.9% crude protein at early and at full blooming stages that lower down to 7% at milk stage (grain formation stage) and to 6% at maturity. Grain yield is related with diverse physiological, morphological and agronomic traits of maize. By improving these traits the production of maize genotypes may be improved. On the basis of above said views, present study was conducted to evaluate maize accessions for morphological and physiological traits of maize for grain yield
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