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Phytochrome RNAi enhances major fibre quality and agronomic traits of the cotton Gossypium hirsutum L

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  • Ibrokhim Y. Abdurakhmonov

    (Centre of Genomics and Bioinformatics, Academy of Sciences of Uzbekistan, Ministry of Agriculture & Water Resources of Uzbekistan, and 'Uzpakhtasanoat' Association
    Former address: Centre of Genomic Technologies, Institute of Genetics and Plant Experimental Biology, Academy of Sciences of Uzbekistan, Yuqori Yuz, Kibray Region, Tashkent District 111226, Uzbekistan)

  • Zabardast T. Buriev

    (Centre of Genomics and Bioinformatics, Academy of Sciences of Uzbekistan, Ministry of Agriculture & Water Resources of Uzbekistan, and 'Uzpakhtasanoat' Association
    Former address: Centre of Genomic Technologies, Institute of Genetics and Plant Experimental Biology, Academy of Sciences of Uzbekistan, Yuqori Yuz, Kibray Region, Tashkent District 111226, Uzbekistan)

  • Sukumar Saha

    (USDA-ARS, Crop Science Research Laboratory, Genetics and Precision Agriculture)

  • Johnie N. Jenkins

    (USDA-ARS, Crop Science Research Laboratory, Genetics and Precision Agriculture)

  • Abdusattor Abdukarimov

    (Centre of Genomics and Bioinformatics, Academy of Sciences of Uzbekistan, Ministry of Agriculture & Water Resources of Uzbekistan, and 'Uzpakhtasanoat' Association
    Former address: Centre of Genomic Technologies, Institute of Genetics and Plant Experimental Biology, Academy of Sciences of Uzbekistan, Yuqori Yuz, Kibray Region, Tashkent District 111226, Uzbekistan)

  • Alan E. Pepper

    (Texas A&M University)

Abstract

Simultaneous improvement of fibre quality, early-flowering, early-maturity and productivity in Upland cotton (G. hirsutum) is a challenging task for conventional breeding. The influence of red/far-red light ratio on the fibre length prompted us to examine the phenotypic effects of RNA interference (RNAi) of the cotton PHYA1 gene. Here we show a suppression of up to ~70% for the PHYA1 transcript, and compensatory overexpression of up to ~20-fold in the remaining phytochromes in somatically regenerated PHYA1 RNAi cotton plants. Two independent transformants of three generations exhibited vigorous root and vegetative growth, early-flowering, significantly improved upper half mean fibre length and an improvement in other major fibre characteristics. Small decreases in lint traits were observed but seed cotton yield was increased an average 10–17% compared with controls. RNAi-associated phenotypes were heritable and transferable via sexual hybridization. These results should aid in the development of early-maturing and productive Upland cultivars with superior fibre quality.

Suggested Citation

  • Ibrokhim Y. Abdurakhmonov & Zabardast T. Buriev & Sukumar Saha & Johnie N. Jenkins & Abdusattor Abdukarimov & Alan E. Pepper, 2014. "Phytochrome RNAi enhances major fibre quality and agronomic traits of the cotton Gossypium hirsutum L," Nature Communications, Nature, vol. 5(1), pages 1-10, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4062
    DOI: 10.1038/ncomms4062
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