A biosystematic study of the origin of the cultivated diploid potato,Solanum x AjanhuiriJuz. etBuk.
✍ Scribed by Z. Huaman; J. G. Hawkes; P. R. Rowe
- Book ID
- 104617897
- Publisher
- Springer
- Year
- 1982
- Tongue
- English
- Weight
- 817 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0014-2336
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✦ Synopsis
The origin and nature of the diploid cultivated potato species S. ajanhuiri Juz. et BUK. was studied. Several lines of evidence indicate that S. ajanhuiri might be derived from natural crosses between primitive cultivars of the diploid species S. stenotomum and the wild species S. megistacrolobum.
Morphological comparisons were made between S. stenotomum x S. megistacrolobum Ft hybrids and naturally occurring S. ajanhuiri to investigate this hypothesis. Comparisons were also made between S. ajanhuiri x S. stenotomum crosses and the F2 generation of the first-mentioned cross.
Crosses between the two major groups of S. ajanhuiricuhivars, Ajawiri and Yari, showed not only genetic breakdown but also a wide range of phenotypic variation similar to those of artificial F2 families of S. stenotomum
x S. megistacrolobum.
Furthermore, there was strong evidence showing that the Yari group of S. ajanhuiri could almost certainly be an Ft S. stenotomum x S. megistacrolobum hybrid, whereas the Ajawiri group could be a backcross of an Ft hybrid to S. stenotomum.
These results added further support to the hypothesis of a hybrid origin of S. ajanhuiri, as well as indicating its putative parents. It is suggested that this hybridogenic taxon be retained at the species level under the name Solarium x ajanhuiri.
*The Solarium species cited here are henceforth designated by three-letter abbreviations (c.f. SIMMONDS, 1963).