Karyotype analysis of Lathyrus taxa belonging to Platystylis (=Lathyrostylis) section (Fabaceae) from Turkey

Karyotype analysis of 16 wild taxa from section Platystylis (Lathyrus, Fabaceae) growing in Turkey, have been described. These are L. pallescens (Bieb.) Koch, L. brachypterus Cel., L. haussknechtii Sirj., L. karsianus P.H. Davis, L. satdaghensis P.H. Davis, L. nivalis Hand.-Mazz., L. atropatanus (Grossh.) Sirj., L. armenus (Boiss. & Huet) Sirj. L. cyaneus (Steven.) Koch var. cyaneus, L. digitatus (Bieb.) Fiori, L. tukhtensis Czecz., L. variabilis (Boiss. & Kotschy.) Maly, L. spathulatus Cel., L. elongatus (Bornm.) Sirj. L. cilicicus Hayek & Siehe, L. boissieri Sirj. Karyotype analysis was made in detail for the frist time for 13 of these taxa including seven endemic species. For all species except, L. brachypterus (2n=28), the chromosome number has been determined as 2n=14. Long arm, short arm and total lengh of the chromosomes were measured, centromeric index and relative lenght were calculated. The karyotypic formulae were 12m+2sm, 10m+4sm, 8m+6sm, 2M+8m+4sm and 2m+10sm+2st. The photographs showing metaphase chromosomes of the species, karyotypes and idiograms are included to the study.