Modern varieties are the products of extensive breeding between different cultivar groups and wild species. Potato varieties grown outside of South America since the end of the sixteenth century, as well as landrace (indigenous) cultivars grown in lowland Chile and in the high Andes are referred to as Solanum tuberosum, within which several groups are recognized (Spooner et al. ![]() The genetic resources available for potato improvement comprise a polyploid series (2n = 2x = 24 to 2n = 6x = 72) with genetic features that facilitate gene transfer across ploidy levels. ![]() Farmers’ landrace varieties dominate potato production in the Andean center of origin and diversity as cultivars they offer tremendous trait diversity in readily useable form.
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