Abstract
Interspecific potato somatic hybrids between Solanum tuberosum L. (di)haploid C-13 and 1 endosperm balance number non-tuberous wild species S. etuberosum Lindl. were produced by protoplasts electrofusion. The objective was to transfer virus resistance from this wild species into the cultivated potatoes. Post-fusion products were cultured in VKM medium followed by regeneration of calli in MS13 K medium at 20°C under a 16-h photoperiod, and regenerants were multiplied on MS medium. Twenty-one somatic hybrids were confirmed by RAPD, SSR and cytoplasm (chloroplast/mitochondria) type analysis possessing species-specific diagnostic bands of corresponding parents. Tetraploid nature of these somatic hybrids was determined through flow cytometry analysis. Somatic hybrids showed intermediate phenotypes (plant, leaves and floral morphology) to their parents in glass-house grown plants. All the somatic hybrids were male-fertile. ELISA assay of somatic hybrids after artificial inoculation of Potato virus Y (PVY) infection reveals high PVY resistance.
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Abbreviations
- CRBC:
-
Chicken red blood cell
- CTAB:
-
Cetyltrimethylammonium bromide
- nDNA:
-
Nuclear DNA
- DUS:
-
Distinctness, uniformity and stability
- EBN:
-
Endosperm balance number
- FC:
-
Flow cytometry
- HEPES:
-
4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid
- PVY:
-
Potato virus Y
- RAPD:
-
Random amplified polymorphic DNA
- RCBD:
-
Randomized complete block design
- SSR:
-
Simple sequence repeat
- TPS:
-
True potato seed
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Acknowledgments
Authors are indebted to Dr. PS Ahuja, Director, Institute of Himalayan Bioresource and Technology (IHBT), Palampur, Himachal Pradesh, for the facility provided for FC analysis. The authors thank Mr. Sheeshram Thakur for the in vitro multiplication and field management. Hearty thanks are also extended to Mr. Akshay and Sanjay, IHBT, for help rendered in FC analysis. The financial assistance received in the form of an ad-hoc research project (F. No. 8-45/2004-Hort. II) from the Indian Council of Agricultural Research (ICAR), New Delhi, is gratefully acknowledged.
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Tiwari, J.K., Poonam, Sarkar, D. et al. Molecular and morphological characterization of somatic hybrids between Solanum tuberosum L. and S. etuberosum Lindl.. Plant Cell Tiss Organ Cult 103, 175–187 (2010). https://doi.org/10.1007/s11240-010-9765-x
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DOI: https://doi.org/10.1007/s11240-010-9765-x