Using ISSR analyses genetic relationships were studied between the populations of the next species of angustifoliate fescue: F. macutrensis, F. rupicola, F. arietina, F. valesiaca, F. pallens, F. psammophila and F. brevipila. High level of ISSR loci polymorphism (average 92.9%) was shown. The species specific amplicon was revealed for F. valesiaca as well as the common fragment was identified for two related species--F. pallens and F. psammophila. On the basis of NJ analyses the differentiation of species was confirmed on such large aggregates as F. glauca agg. and F. valesiaca agg. More clear differentiation of the species was shown for F. glauca agg., while for F. valesiaca agg. we have not found any regularity of genetic relations among the species that represent this aggregate.
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Early evolution of wing scales prior to the rise of moths and butterflies.
Curr Biol
September 2022
College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China. Electronic address:
Although scales are a defining and conspicuous feature of moths and butterflies (Lepidoptera), their earliest evolution predates the group but is shrouded by a dearth of fossil evidence. Herein, we report two new species in mid-Cretaceous Kachin amber, representing lineages closely related to Lepidoptera: one represents the extinct Tarachoptera, with dense scales on the fore- and hindwings, while the other is an early lineage of caddisflies, with a hindwing covered by a single layer of angustifoliate scales. A novel phylogenetic analysis of 174 morphological characters and 73 extant and fossil representatives of Mecopterida demonstrates a monophyletic origin of scales in the common ancestor of Tarachoptera, Trichoptera, and Lepidoptera; that Tarachoptera are monophyletic but their scale morphology is plesiomorphic for the whole group; and that scales were lost early in caddisfly evolution before reappearing multiple times within the clade.
View Article and Find Full Text PDFUsing ISSR analyses genetic relationships were studied between the populations of the next species of angustifoliate fescue: F. macutrensis, F. rupicola, F.
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