مشخصات پژوهش

عنوان	Taxonomic status and genetic differentiation of Hyrcanian Castanea based on noncoding chloroplast DNA sequences data
نوع پژوهش	مقاله چاپ شده
کلیدواژه‌ها	Castaneasativa, DNAbarcoding, Morphologicaltraits, Haplotypediversity
چکیده	The taxonomy and phylogenetic relationships among Castanea species were investigated using sequence data from the chloroplast trnL-F and trnH-psbA intergenic spacer regions. Samples included Castanea specimens of uncertain taxonomic affinity that were collected in the Hyrcanian forest of northern Iran. The trnL-F data were more informative than trnH-psbA, having seven parsimonyinformative sites. A low level of haplotype diversity was detected within Hyrcanian samples and the whole species of the genus Castanea. In thetrnL-F dataset, Castanea sativa and Castanea mollissima have unique character states that differentiate them from other species of Castanea. The genus Castanea was recovered as a monophyletic with high to moderate support when inferred from combined trnH-psbA and trnL-F spacer data. Two main lineages received minimal support in the trnL-F analysis, whereas trnH-psbA could not distinguish different species of Castanea from each other. Finally, low levels of haplotype diversity was found within small remnant stands of Castanea in the Hyrcanian forest, indicatingthatgeneticerosionmayincreasetheextinctionrisk for these valuable trees.
پژوهشگران	حامد یوسف زاده (نفر اول)، نیکولاس پی تیپری (نفر چهارم)، فاطمه اکبرزاده روشن (نفر سوم)، اباصلت حسین زاده کلاگر (نفر دوم)