Summary
In the first inbred generation (I1) of cv. Black 4495 a dark green, slowly growing mutant (coded ds) was found, whereas the I1 of its self-compatible dihaploid, B16, comprised this ds mutant and in addition the mutants virescens (v) and yellow margin (ym). The occurrence of ds and ym might trace back to diploid S. phureja, one of the ancestors of Black 4495. No lethal mutants were observed in I1 of B16. Analysis of I1 of cv. Gineke revealed a simplex condition for virescence and either duplex or triplex heterozygosity for one lethal gene. On the other hand, the I1 of its dihaploid, G254, segregated for virescence and for three different lethal genes. It is shown that both in B16 and in G254 homozygosity of an S-bearing translocation causes early death of embryo and endosperm, thus preventing seed development. From this study it appeared that the three lethal genes from G254 affect germination rate of the seeds. The genotypes at 11 loci of B16 and G254 are presented.
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Visiting scientists from Birmingham, England and Mlochow, Poland, respectively.
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Hermsen, J.G.T., Taylor, L.M., Van Breukelen, E.W.M. et al. Inheritance of genetic markers from two potato dihaploids and their respective parent cultivars. Euphytica 27, 681–688 (1978). https://doi.org/10.1007/BF00023703
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DOI: https://doi.org/10.1007/BF00023703