This Week in Nature

In this week's Nature, an international research team presents an analysis of the genomes of 60 different citrus varieties ranging from the Chinese mandarin to the Chandler pummelo, providing a new evolutionary framework for this genus of fruit plants. The researchers find that today's citrus trees are descended from at least 10 natural citrus species, and propose that citrus diversified during the late Miocene epoch through a rapid southeast Asian radiation that correlates with a marked weakening of the monsoons.

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Mice in New York harbor both antibiotic-resistant bacteria and novel viruses, according to a new analysis of their fecal microbiomes.

Human Heredity and Health in Africa Initiative has issued guidelines for genomic research in the region, according to Nature News.

The Associated Press reports that an ethicist predicts that prenatal diagnosis and other advances will lead to more choices being available to prospective parents.

In Genome Biology this week: approach to analyze alternative polyadenylation, algorithm to predict transcriptomic structural variations, and more.