Chromosome numbers and biogeography of the genus Trigonella (Fabaceae)

Abstract

A survey on chromosome counts of different sections belonging to the genus Trigonella L. (Fabaceae) throughout the world is presented and the relationships between chromosome data of its sections and their biogeography are also discussed here. In addition, chromosome numbers of 58 populations belonging to 19 species growing in Iran are reported. All studied species except T. monantha and T. orthoceras were diploid with chromosome number 2n = 2x = 16. T. monantha with four subspecies (2n = 4x = 28, 2n = 6x = 42) and T. orthoceras (2n = 6x = 48) were polyploid taxa. Based on the results, x = 7, 8 was determined for Trigonella genus. According to the chromosome and geographical data, Iran can be regarded as the center of origin of Trigonella genus.

Chromosome counts of eight Iranian endemic species of Nepeta L. (Lamiaceae)

“…Scutellaria is one of the largest genera within Lamiaceae that also has a complex chromosomal variation as at least 14 different chromosome numbers have been found for the genus 2n = 14, 16,18,20,22,24,26,28,30,32,34,44,60,88. The basic chromosome number x = 13 in East and Southeast Asia, x = 12 in America and x = 11 in North Africa and Eurasia are predominating (Ranjbar and Mahmoudi 2013).…”

Exploring the medicinally important secondary metabolites landscape through the lens of transcriptome data in fenugreek (Trigonella foenum graecum L.)

“…It is native to India and eastern Mediterranean countries. The genus Trigonella includes 140 species distributed globally, among which 107 species occur in Asia 2 . In India mainly two types are commonly cultivated i.e., common fenugreek ( Trigonella foenum-graecum L.) for leaves, stem and seeds, and Kasuri fenugreek ( Trigonella corniculata L.) for leaves.…”

Notes on the taxonomy of some perennial species of Trigonella sect. Ellipticae (Fabaceae) in Iran

“…Among the 48 taxa of Trigonella reported from Iran, 15 (32%) are endemic and 14 species belong to T. sect. Ellipticae (Rechinger 1984, Hamzeh'ee 2000, Janighorban 2004, Badrzadeh and Ghafarzadeh‐Namazi 2009, Ranjbar et al 2012a, b2012b, Ranjbar and Hajmoradi 2015, 2016). The section consists of perennials with entire or dentate stipules, yellow or rarely white or dark violet petals with violet veins, a campanulate calyx, generally transversely veined and wingless or thin winged pods, and smooth seeds.…”