Abstract
I HAVE already reported some of the results of my search for resistance to the potato root eelworm among the South American tuber-forming Solanum species in the Commonwealth Potato Collection1,2. This work, begun in 1941, is now practically complete, and more than 1,200 lines, belonging to more than sixty species, have been tested in duplicate on at least one occasion. Very few have been found to be resistant; one such line, Solanum ballsii, has certain disadvantages for breeding work as it is a diploid, whereas the domestic potato, S. tuberosum, is a tetraploid. In 1948, however, I was fortunate in finding a further five apparently resistant lines (C.P.S. numbers, 1673, 1685, 1692, 1595 and 1647), four of which belong to S. tuberosum sub-species andigenum, a group of tetraploids very close to the domestic potato and readily crossed with it; the other (1647) is a sterile triploid. Tests in later years have confirmed the early promise of these lines.
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References
Ellenby, C., Emp. J. Exp. Agric., 13, 158 (1945).
Ellenby, C., Nature, 164, 704 (1948).
Ellenby, C., Ann. App. Biol., 33, 433 (1946).
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ELLENBY, C. Resistance to the Potato Root Eelworm, Heterodera rostochiensis Wollenweber. Nature 170, 1016 (1952). https://doi.org/10.1038/1701016a0
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DOI: https://doi.org/10.1038/1701016a0
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