A comparative study on genotypic variability and genotypic and phenotypic correlations in seed and seedling vigour traits in the hybrids of pearl millet (Pennisetum glaucum) and maize (Zea mays L.)

摘要

The paper presents the results of a comparative evaluation of seed and seedling vigour traits of several* pearl millet and maize hybrids. Good quality seeds, good storage, free of disease and insects are essential to maintain genetic purity of a cropseed. The hybrids of both the crops showed large variability in the seedling traits studied, but the degree of the variability of these traits is more in pearl millet hybrids. Significant genotypic and phenotypic correlations occur among some of the seedling traits. The heritability percentages of these traits are much higher in pearl millet compared to those in maize hybrids indicating that there is a great scope in genetic improvement of the seed vigour traits utilizing these traits in pearl millet. Poor seed and seedling vigour in pead millet hybrids are attributed to smaller seed size and lower seed reserve compared to that in maize hybrids. Therefore, shallow sowing depth and uniform land preparation are recommended to ensure good emergence in pearl millet. The improvement of bolder and compact seeds needs to be given emphasis in a breeding programme of pearl millet.