African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12368

Article in Press

Improving the viral resistance in potato by classical and molecular breeding methods: A review

Molla Gererme Taye1*, Taller Janos1, Istvan Cernak1,2 and Gyula Vida1,3

  •  Received: 18 April 2021
  •  Accepted: 17 June 2021
Potato is a versatile crop, and it has owned one of the richest gene pools of any other cultivated plants. However, numerous biotic agents influence the crop, resulting in variable degrees of yield loss in both quantity and quality for growers. There are more than 40 different virus diseases infecting potatoes worldwide. The most detrimental major potato viruses are potato virus Y, potato leafroll virus, potato virus A, potato virus M, and potato virus S, of which PVYis the furthermost economically important and severe virus of all, and its crop yield losses can reach up to 80 %. In the course of potato viral diseases management, lots of complimentary options have been exercising such as the use of certified seed-tubers, phytosanitary regulations, targeting the vectors, and use of resistant varieties. Classical breeding strategies combined with mechanical inoculations have been predominantly conducted to evaluate the levels of resistance among breeding materials. Many DNA-based molecular markers for different potato viruses have been lately developed for the selection of resistance genotypes, and the combination of the two breeding schemes is not uncommon. Therefore, this review summarizes the classical and molecular methods of viral resistance breeding in potatoes and introduces the trait improvements made, and possible challenges connected to these breeding approaches.

Keywords: Potato, Potato viruses, Classical breeding, Molecular breeding, Marker-assisted selection