distribution of cr1-like transposable element in woodpeckers (aves piciformes): z sex chromosomes can act as a refuge for transposable elements. | birds have relatively few repetitive sequences compared to other groups of vertebrates; however, the members of order piciformes (woodpeckers) have more of these sequences, composed mainly of transposable elements (te). the te most often found in birds is a retrotransposon chicken repeat 1 (cr1). piciformes lineages were subjected to an expansion of the cr1 elements, carrying a larger fraction of transposable elements. this study compared patterns of chromosome distribution among five bird speci ... | 2018 | 30499043 |
bird attributes, plant characteristics, and seed dispersal of pera glabrata (schott, 1858), (euphorbiaceae) in a disturbed cerrado area. | several plant characteristics, such as fruit production, nutrient reward, secondary compounds, and fruit color display, affect fruit choice by birds. on the other hand, several bird attributes affect their efficiency as dispersers. here we investigate the ornithochoric seed dispersal of pera glabrata schott (euphorbiaceae) in a cerrado fragment in southeastern brazil. a set of bird attributes, such as frequency of visits, number of diaspores eaten, time spent foraging, methods of taking and hand ... | 2007 | 18278313 |
genomic organization of repetitive dna in woodpeckers (aves, piciformes): implications for karyotype and zw sex chromosome differentiation. | birds are characterized by a low proportion of repetitive dna in their genome when compared to other vertebrates. among birds, species belonging to piciformes order, such as woodpeckers, show a relatively higher amount of these sequences. the aim of this study was to analyze the distribution of different classes of repetitive dna-including microsatellites, telomere sequences and 18s rdna-in the karyotype of three picidae species (aves, piciformes)-colaptes melanochloros (2n = 84), colaptes campe ... | 2017 | 28081238 |