preprint
Polyploidy in Orchid Breeding, Advances and Perspectives
Fecha
2022-02-15Registro en:
10.20944/preprints202202.0181.v1
814-C0-244
814-B5-A49
Autor
Bolaños Villegas, Pablo Alberto
Chen, Fure-Chyi
Institución
Resumen
The orchid market is a dynamic horticultural business in which novelty and beauty command
high prices. The development of miniature to large and showy flowers, in addition to fragrance,
is mainly of interest. Overall organ size might be modified by doubling the chromosome
number, which can be accomplished by careful study of meiotic chromosome disjunction in hybrids
or species. Meiosis is the process in which diploid (2n) pollen mother cells recombine their DNA
sequences and then undergo two rounds of division to give rise to four haploid (n) cells called
sporads. Thus, by interfering in chromosome segregation, one can induce the development of diploid
recombinant sporads called dyads. These dyads may be used for breeding polyploid progenies
with enhanced fertility and large flower size. This review gives an overview of developments in
orchid breeding placed in the large context of ploidy breeding in higher plants to facilitate innovation.