Inheritance of different fiber colors in cotton (Gossypium barbadense L.)

Luiz Paulo de Carvalho,Francisco José Correia Farias,Josiane Isabela da Silva Rodrigues,Marleide Magalhães de Andrade Lima

doi:10.1590/1984-70332014v14n4n40

Luiz Paulo de Carvalho, Francisco José Correia Farias + Show 2 more

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https://doi.org/10.1590/1984-70332014v14n4n40

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Abstract

Most of cotton (Gossypium hirsutum) fibers produced in the world are white, in spite of the lint and fiber of tetraploid cottons (G. barbadense), exhibiting various shades of green and brown. Cotton fiber color is a genetically inherited trait resulting from the presence of pigments intermingled with cellulose. Inheritance of fiber color is relatively simple, with high heritability, but in wild accessions it is still unknown. The objective of this study was to determine the inheritance of fiber color in G. barbadense accessions representing different shades of brown. We crossed wild G. barbadense accessions and G. hirsutum cultivars (with white fiber) and obtained the F2 generations, and BC1 and BC2 backcrosses. It may be concluded that fiber color is controlled by one gene, with partial dominance of the brown color over white, except for the grayish color of the PI 435267 accession, which showed the white to be partially dominant.

Highlights

Most of cotton (Gossypium hirsutum) fibers produced in the world are white, in spite of the lint and fiber of tetraploid cottons (G. barbadense), exhibiting various shades of green and brown
Cotton fiber color is a genetically inherited trait resulting from the presence of pigments intermingled with cellulose
The objective of this study was to determine the inheritance of fiber color in G. barbadense accessions representing different shades of brown

Summary

Introduction

Most cotton fibers produced in the world are white; lint and fiber of tetraploid cottons occur in colors ranging from white to various shades of green and brown. Gossypium hirsutum L. typically has white fiber and G. barbadense L. frequently has cream color (Percy and Kohel 1999). The color of cotton fiber is the result of the presence of pigments intermingled with cellulose. It is a genetically inherited characteristic resulting in different shades of green and brown (Dickerson et al 1999). Fiber fragments were found in the colors blue, purple, pink, brown, green, bronze, and red. Some of these colors for cotton still exist, but others have disappeared and did not come to be described in the botanical literature (Chaudhry 1992). Colored fiber cotton has been grown and used in textile products from indigenous populations of the Americas for centuries (Vreeland Jr 1987)

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