PJB-2018-106
INTEGRATION OF CYTOLOGICAL AND MOLECULAR ANALYSIS TO CONFIRM A HYBRIDITY IN F1 BRASSICA PROGENY
Janetta Niemann
Abstract
In Brassica, interspecific hybridization is a potential and useful method for transferring valuable traits between species of commercial interest. In our previous experiments successful interspecific hybrids were obtained through hybridization between chosen rapeseed cultivars (Brassica napus L.) and Brassica rapa genotypes for transferring clubroot resistance from wild species into cultivated background. In presented research morphological, cytological and simple sequence repeats (SSR)-based molecular analyses were carried out to confirm the hybrid nature of the F1 plants. This paper evidences for successful twenty three F1 interspecific hybrids establishment through employed analysis. Moreover, six out of eleven cross combination were confirmed as fertile. Generally, results indicated that analyzed morphological characters of F1 hybrids were intermediate as compared to those of both parental genotypes. Furthermore, in pollen mother cells (PMCs) of the F1 hybrids abnormalities like univalent, lagging chromosomes and disorders in synchronization were observed in meiosis. Generally, the abnormalities in meiosis occurred in most of tested genotypes with the mean frequency of 63.8%. Among tested SSR primers, Na10-A08 was found to reveal highly polymorphic bands in hybrids. As a result, 41.1% of investigated plants were confirmed as true hybrids.
To Cite this article:
Download
