نتایج جستجو برای: biosystematic
تعداد نتایج: 110 فیلتر نتایج به سال:
the matrix of qualitative and quantitative data compiled from comparative measures of 14 dental and skull morphology and 17 dentally variable morphometric characters taken from samples of 18 populations of house mouse, mus musculus, which were previously determined genetically, distributed over eurasian and north african habitats of the species are used for uni-and-multivariate analysis, aiming...
Next-generation sequencing is becoming increasingly accessible to researchers asking biosystematic questions, but current best practice in both choosing a specific approach and effectively analysing the resulting data set is still being explored. We present a case study for the use of genotyping-by-sequencing (GBS) to resolve relationships in a species complex of Australian arid and semi-arid g...
HE sterility of triploids and other unbalanced polyploids is generally conT ceded to be a consequence of irregularities in the distribution of univalents and multivalents at meiosis. Occasional viable gametes are produced, however, because of nonrandom orientation and segregation of chromosome associations. Thus, SATINA and BLAKESLEE (1937a, b) found a higher frequency of n and 2n chromosome nu...
Readers of Kalmiopsis were recently treated to a synopsis of taxonomic changes affecting flowering plants in Oregon (Chambers, 1992). The present article has been written to update readers on nomenclatural changes recently proposed for the seedless vascular plants, which include not only ferns, but also horsetails, club-mosses, and their relatives. Together these groups are often referred to as...
Drosophila melanogaster 125I-5S RNA was annealed to salivary gland preparations of 6 species in the virilis group of Drosophila. Two patterns of annealing were found. D. virilis, D. montana and D. borealis showed three 5S gene clusters on chromosome 5; Sd-f and Wc-j were strongly labeled, but Xa-e was weakly labeled. D. montana and D. borealis have a greater percentage of their total 5S cistrom...
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