Karyologische Variabilität in Kreuzungsnachkommen – eine Herausforderung bei der Züchtung neuer Baldriansorten (Valeriana officinalis L. s.l.) Ploidy

A comprehensive overview of breeding strategy to improve phenotypic and quality traits in Valeriana jatamansi Jones

“…When the reciprocal crosses of di, tetra and octoploid V. officinalis were carried out surprising results were found like a triploid progeny when an octoploid mother was crossed with a diploid father where a pentaploid was expected and tetraploid progeny of tetra and diploid parents where a triploid was expected. This may be due to improper emasculation or distorting effect during meiosis [ 63 ]. However, there is a dearth of information regarding the frequency of such polyploids in natural populations.…”

“…Reciprocal crosses of di, tetra and octoploid Valeriana officinalis resulted in triploid progeny in a cross involving octoploid (♀) x diploid (♂). This may be due to distorting effect during meiosis [ 63 ] leading to chromosome elimination. Investigations are yet to be made in V. jatamansi on response to anther culture and also hybridizations involving different ploidy levels to possibly yield haploids which may be utilized for production of doubled haploids through colchicine treatment to achieve chromosome doubling.…”