National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Maize (Zea mays L.) is one of the most diversified and versatile crop grown worldwide under varied agro-climatic condition. However, a significant amount of reduction in grain yield has been reported because of heat stress. Being a complicated character that depends on multiple component traits, direct selection is in effective for grain yield. Considering these aspects, a study was conducted to determine the magnitude and extent of trait interdependency among yield and yield attributing characters under heat stress condition using forty five maize hybrids. The hybrids were evaluated by following randomized block design with two replications at EB-II section of the Department of Plant Breeding and Genetics, College of Agriculture, OUAT, Bhubaneswar during Summer 2018. Association studies revealed that, six characters viz., plant height, ear height, cob diameter, number of grain rows per cob, number of grains per row and 100 seed weight exhibited significantly positive correlation at both genotypic and phenotypic level, while anthesis to silking interval was the only trait that attained negative significant correlation at genotypic level with grain yield per plant. Path analysis indicated that plant height, ear height, number of rows per cob and 100 grain weight have positive direct effect while, anthesis to silking interval has negative direct effect on grain yield per plant. Hence, these traits in desirable direction could be relied upon for selection of genotypes in order to improve genetic yield potential of maize under heat stress condition.
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