PATHOLOGY

Detailed explanation-1: -This involves identifying parents with desired characteristics for crossing to produce true (botanical) potato seed (TPS). TPS is planted to produce seedling tubers for field planting. Second, superior progeny are identified and these selections undergo additional evaluation for economically important characteristics.

Detailed explanation-2: -Breeding methods Potato is a self pollinated crop but is vegetatively propagated. The cultivated tetrapliod varieties are highly heterozygous. Most of them are also pollen sterile. selfing or inbreeding in potato leads to loss of vigor of the progeny and non-flowering.

Detailed explanation-3: -Potato breeders incorporated resistance against early and late blight disease by crossing hybrid lines with wild species (S. brevidens and S. bulbocastanum) which inherited resistance against fungal pathogens (Naess et al., 2000; Tek et al., 2004).

Detailed explanation-4: -Potato cultivars worldwide are mostly tetraploid and clonally propagated. For over a century, the breeding strategy has been phenotypic recurrent selection.