Evaluation of genotypic and phenotypic correlation with yield and earliness in tetraploid species cotton

Document Type : Research Paper

Authors

1 MSc. Graduated , Islamic Azad University, Damgan Branch

2 Cotton Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran

3 Islamic Azad University, Damgan Branch

Abstract

Cotton is qquantitative parameters by which multiple genes can be controlled. Increasing the yield and quality of cotton is important factors that affected by genetic and environmental factors. Factors affecting on yield and earliness, and genetic and environmental influences are determinate that can be useful in breeding of new varieties. In this study 20 genotypes of crop species barbadense and hirsutum were evaluated in a randomized complete block design in 2013. The results showed that Bakhtegan and Barg pahne barg ghermeze were the heaviest 30 bolls weight (200.5 and 202.4 gr respectively). Giza and Termez14 and barbadense ( all of the Gossypium barbadense) were the lowest 30 bolls weight (105.9, 108.3 and 111.5 gr respectively). The yield significant positive genetic correlation was observed with numbers of monopodial branches, largest monopodial branch length and 30 bolls weight on the surface of one percent. And also, Yield had significant negative genetic correlation with the height, numbers of sympodial branches on the surface of one percent. Earliness had Positive and significant genetic correlation with height, number of sympodial branches, sympodial branch length and boll numbers. Meanwhile, earliness showed significant negative genetic correlation with the numbers of monopodial branches, largest monopodial branch length, 30 bolls weight, and yield.

Keywords


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