Haploid Plants of Solanum demissum View Full Text


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Article Info

DATE

1950-11

AUTHORS

G. S. INS, H. W. HOWA

ABSTRACT

THE wild hexaploid (2n = 72) species Solanum demissum Lindl. has been widely used in breeding for blight (Phytophthora infestans) resistance in potatoes. Crossed with cultivated S. tuberosum varieties (tetraploids with a chromosome number of 2n = 48) it gives pentaploid (2n = 60) hybrids which can be back-crossed by S. tuberosum. An alternative method of breeding has been suggested by Black1. This consists of crossing S. demissum with a diploid (2n = 24) species such as S. Rybinii to get a tetraploid (2n = 48) F1 hybrid, which is then crossed with S. tuberosum varieties. This latter method appears to have much to recommend it, particularly as Thomas2 states that, in the hybrid S. demissum × S. Rybinii and in the triple hybrid (S. demissum × S. Rybinii) × S. tuberosum, “chromosome differentiation between these related species is not sufficient to affect pairing to any extent”. This presumably means that, at least in the triple hybrid, about twenty-four bivalents are formed at meiosis. More... »

PAGES

795-795

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/166795a0

DOI

http://dx.doi.org/10.1038/166795a0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1037944905

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/14780261


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