Genetic Analysis for Quantitative and Quality Characters in Three Single Crosses of Upland Cotton

Srinivasan Kannan,Rajashekaran Ravikesavan,Mahalingam Govindaraj

doi:10.15835/nsb548323

Srinivasan Kannan, Rajashekaran Ravikesavan + Show 1 more

Open Access

https://doi.org/10.15835/nsb548323

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Abstract

Gene effects were studied for 12 characters in three crosses of Gossypium hirsutum by six generation mean model to determine the potential for improvement of yield components and fiber quality in upland cotton. Additive genetic variance (gene action) was predominantly operating in the inheritance of boll weight, single plant yield, and lint index. In the presence of epistasis dominance and additive × additive gene effects were observed for boll weight, single plant yield, lint index, ginning outturn, 2.5 percent span length, bundle strength fineness and uniformity ratio. Boll weight, lint index, seed index, ginning outturn, fineness, bundle strength and uniformity ratio were predominantly under the control of dominance and dominance × dominance gene action. Duplicate type epistasis was noticed for all the studied characters and the possible breeding strategies for improvement of lint yield and quality traits were discussed.

Highlights

Cotton (Gossypium hirsutum) is one of the important commercial crops of world and it is considered as the ‘King’ of fibers
Gene effects in six parameter model revealed that mean values were highly significant for all the characters in all the crosses (Tab. 1 and 2)
The crosses ‘KC2 x MCU12’ for 2.5 percent span length, uniformity ratio and elongation percentage, and ‘MCU5 x MCU12’ for seed index, bundle strength, fineness, uniformity ratio and elongation percentage showed significant additive gene effects (d), indicating that additive gene action was operative for the control of these traits in respective crosses

Summary

Introduction

Cotton (Gossypium hirsutum) is one of the important commercial crops of world and it is considered as the ‘King’ of fibers. The present investigation has been conducted to investigate the gene effects in three single crosses of upland cotton for yield and fibre quality parameters.

Results

Conclusion