Phylogeny and Evolution of the Jumping Spider Genus Habronattus

小行星9707368 建议的工作是重建的跳蛛属Habronattus，主要是北美组的95个描述的物种的系统发育史。将从大约70个物种中收集至少三个基因的DNA序列数据，这些数据将与形态学数据一起进行分析，以重建物种的系统发育关系。 然后，利用染色体发生学，研究染色体和行为的特征变化模式。 现有的数据表明，XXXY染色体系统已经独立出现了几次。 要研究的一个问题是，交叉定位的变化是否释放了一个约束，允许重复推导的XXXY系统。 另一个焦点是求偶行为。 虽然雌性是神秘的颜色，但许多物种的雄性都有精心制作的彩色标记和结构，并在求爱期间进行复杂的行为。 行为数据将被分析的发育，以寻求模式的性格变化，其中一个复杂的风格的求爱是从另一个，并在分布的颜色和运动在男性行为。 这些研究将促进我们对染色体和行为变化的理解，从而促进我们对多样化背后的力量和制约因素的理解。

9707368 Maddison The proposed work is a reconstruction of the phylogenetic history of jumping spiders of the genus Habronattus, a primarily North American group of 95 described species. DNA sequence data from about 70 species will be gathered for at least three genes, which together with morphological data will be analyzed to reconstruct the phylogenetic relationships of the species. Then, using the phylogeny, patterns of character change in chromosomes and behaviors will be studied. Available data indicate that an XXXY chromosome system has arisen several times independently. One question to be studied is whether shifts in chiasma localization released a constraint to allow repeated derivations of the XXXY system. Another focus is courtship behavior. While females are cryptically colored, males of many species have elaborate and colorful markings and structures, and engage in complex behaviors during courtship. Behavioral data will be analyzed on the phylogeny to seek patterns in the character changes by which one complex style of courtship is derived from another, and in distributions of colors and motions in male behavior. These studies will advance our understanding of chromosomal and behavioral change, and hence of the forces and constraints underlying diversification.