Homozygote Depression in Gamete-Derived Dragon-Fruit (<i>Hylocereus</i>) Lines.

Their findings, in turn, are corroborated by the almost insignificant gametoclonal variation (namely, variation in plant morphology) observed in our study in the di-haploid H. megalanthus lines in comparison with the donor plant: the only difference lay in the size of the floral organs (bud length and width) of the di-haploid lines, which was smaller than that of the tetraploids (Figures S3 , S4 ) These findings contrast with the wide variability in plant morphology reported for a di-haploid potato by Rousselle-Bourgeois and Rousselle ( 1992 ).

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