The karyotype ofSophora tetraptera(Fabaceae)

Abstract

The karyotype of Sophora tetraptera (Fabaceae (Leguminosae), subfam. Papilionoideae) is reported for the first time. The chromosome number, 2n = 18, coincides with former reports and is the most common number for the genus. The chromosomes are small (average length 1.65 (Am). The karyotype is composed of 8 m (metacentric) + 1 sm (submetacentric) pairs. Microsatellites were observed on the short arm of the only sm pair. The intrachromosomal and interchromosomal asymmetry indices were A 1 = 0.16 and A 2 = 0.12, respectively. The nine species of Sophora analysed karyotypically so far in the literature suggest that karyotypic features are useful. The diversification of the group apparently has been accompanied by some chromosomal rearrangements yielding differences in karyotype formula and secondary constrictions. Thus, karyotypic data in Sophora are useful for elucidating its taxonomy and evolution.

Phylogenetic relationship among cultivated and wild species of genus Macrotyloma based on cytology and molecular markers

“…All species including plants and animals contains a well-de ned, shape and dimension of chromosomes known as karyotype (Von Sengbusch 2003). The karyoype analysis studies lead to observance of microsatellite on the chromosomes (Stiefkens et al 2003) and this karyotype data was used as a means to identify other species of plants, using different methods of analysis for multiple variables (Gianfranco et al 2008). The aspect that chromosomes show great variation in gross morphology has been a centre of much more attention for the systematists.…”