Biosystematics and evolutionary studies in IndianDrimiaspecies

Authors:
Publisher website
Google Scholar
Abstract
Abstract The taxonomic position and genetic relationship within IndianDrimiaspecies is controversial due to their morphological similarities and genomic complexities. The present work gives an insight on the genetic relationship between IndianDrimiaspecies on the basis of their karyotype, pollen morphology, flower opening characteristics, hybridization behavior, and by use of DNA sequence of two molecular markers (internal transcribed spacers [ITS] and maturase K [matK]). The karyotypic studies of IndianDrimiaspecies revealed various polyploid forms making their identification and delimitation more difficult. The five species of IndianDrimiaare grouped into two complexes,indicacomplex andwightiicomplex on the basis of their pollen morphology, karyotype, and hybridization behavior. These two groups were found to be evolving separately. The cytomorphological studies ofwightiicomplex revealed that it is evolving through polyploid and chromosome repatterning, whileindicacomplex have adapted polyploid as well as hybridization for evolution. Phylogeny obtained from DNA sequences of molecular markers (ITS andmatK) confirmed that theindicacomplex andwightiicomplex are evolving parallely, by grouping them in two clusters. Thus, a combination of conventional and molecular methods proved to be of great use for delimiting a small but complex group of IndianDrimiaspecies.

This publication has 15 references indexed in Scilit: