REPRESENTABILITY OF THE RAPD-LOCI SPECIFIC FOR THE PARENTAL SPECIES OF TRIPLOID AND DIPLOID HYBRIDS BETWEEN ALLOTETRAPLOID POTATO SPECIES AND DIHAPLOIDS SOLANUM TUBEROSUM L.
Abstract
Uncommon diploid interspecific hybrids are formed along with triploid ones during hybridization between allotetraploid potato species S. acaule, S. stoloniferum, S. polytrichon, and S. tuberosum diploid clones. A comparative RAP AP D-analysis of triploid and diploid hybrids has shown that the representability ratio of S. tuberosum specific for the loci in the hybrids corresponded to 1 : 1. It testifies that the diploid interspecific hybrids obviously obtained the same quantity of genetic material of cultivated potatoes as triploid ones. The representability of RAP AP D-loci specific for wild parental species was proportional to the number of wild species genomes in hybrids (2 – in triploid hybrids and 1 – in diploid hybrids). Hence, the production of diploid hybrids between allotetraploid wild potato species and S. tuberosum diploid clones is probably associated with the loss of one of the genomes of wild species. A hypothesis on the formation of diploid interspecific hybrids as a result of fertilization of atypical monoploid egg cells of allotetraploid potato species with the pollen of S. tuberosum diploid clones was suggested.
About the Authors
А. P. YЕRMISHIN
Институт генетики и цитологии НАН Беларуси, Минск
Belarus
Belarus
Е. V. VОRОNKОVА
Институт генетики и цитологии НАН Беларуси, Минск
Belarus
Belarus
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