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Production of fertile somatic hybrids of Gossypium hirsutum + G. bickii and G. hirsutum + G. stockii via protoplast fusion

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Abstract

Fertile somatic hybrids were obtained via symmetric electrofusion of protoplasts from two combinations of tetraploid cotton (G. hirsutum cv. Coker 201, AD genome) and diploid wild cottons G. bickii (G genome) and G. stockii (E genome), respectively. Observation by morphological, flow cytometric analysis, chromosome counting and RAPD analysis of the tested hybrids of Coker 201 + G. bickii and Coker 201 + G. stockii confirmed the regenerated plants as hybrid status. Cytological investigation of the metaphase root-tip cells revealed there were 78 chromosomes in the hybrids. Flow cytometric analysis showed the tested plants had a relative DNA contents close to the total DNA contents of the two parents. RAPD analysis revealed the hybrids contained specific genomic fragments from both fusion partners, further confirmed their hybridity. The morphology of the hybrids was intermediate between the two fusion partners. The hybrid plants were successfully transferred to the soil, and they bloomed and set bolls. It is sure that the new hexaploids developed by cell fusion would contribute to cotton breeding through backcrossing with the elite genotypes of G. hirsutum.

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Abbreviations

MSB:

MS basal salts (Murashige and Skoog, 1962) plus B5 vitamins (Gamborg et al., 1968)

NAA:

α-naphthaleneacetic acid

PCR:

polymerase chain reaction

RAPD:

random amplified polymorphic DNA

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Authors and Affiliations

  1. National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, 430070, Hubei, China

    Yuqiang Sun, Xianlong Zhang, Yichun Nie & Xiaoping Guo

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  1. Yuqiang Sun
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  2. Xianlong Zhang
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  3. Yichun Nie
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  4. Xiaoping Guo
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Correspondence to Xianlong Zhang.

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Sun, Y., Zhang, X., Nie, Y. et al. Production of fertile somatic hybrids of Gossypium hirsutum + G. bickii and G. hirsutum + G. stockii via protoplast fusion. Plant Cell Tiss Organ Cult 83, 303–310 (2005). https://doi.org/10.1007/s11240-005-7770-2

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  • DOI: https://doi.org/10.1007/s11240-005-7770-2

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