In fact, researchers have long recognized that polyploidy is an inseparable part of angiosperm biology.The Braun Lab is concerned not only with species conservation, but with recycling and material sustainability.Soybean and, particularly, its wild relatives have been the focus of much work, developing the latter into a model system for studying natural allopolyploidy.My research lies in the area of plant molecular systematics, molecular evolution, and comparative genomics.The thyroid hormone calcitonin reduces, and parathyroid hormone increases, blood calcium levels.calcium carbonate /KAL-see-əm CARB-ə-nate/ A white compound (Ca CO₃) occurring naturally as chalk, limestone, and marble.Because it is transparent, every cell in its body can be seen. The fate of every cell at every stage of development is known. calcaneus /kal-KANE-ee-əs/ A bone of the tarsus, which in human beings underlies the heel; the heel bone.
calcium (Ca) /KAL-see-əm/ Silver-white metallic element. It is also essential to the function of nerves and muscles, and is a necessary cofactor for the enzymes involved in blood clotting and a variety of other bodily processes.The apple belongs to the subtribe Pyrinae (Rosaceae), a diverse lineage that originated via allopolyploidization.Both small-scale duplications and polyploidy may have been important mechanisms shaping the genome of this species.Here, we review the immense impact of his work on polyploidy over more than 60 years, from his entrance into this fledgling field in the 1920s until the end of his career.Stebbins and his contemporaries developed a model of polyploid evolution that persisted for nearly half a century.MORE INFORMATION calcium channel An ion channel governing the passage of calcium ions.Polyploidy has long been considered a major force in plant evolution. Ledyard Stebbins, Jr., an architect of the Modern Synthesis, elegantly addressed a broad range of topics, from genes to chromosomes to deep phylogeny, but some of his most lasting insights came in the study of polyploidy.The team made it into a recent issue of the SI Sustainability newsletter.My training is as a plant systematist, studying the evolutionary relationships of flowering plants.WGD generally results in instant speciation, increasing biodiversity and providing new genetic material for evolution (e.g., Levin, 1983, 2002).Illustrating the broad impact of polyploidy, ancient WGD events have been documented in vertebrates (e.g., Cañestro, 2012; Braasch and Postlethwait, 2012), fungi (Kellis et al., 2004), and ciliates (Aury et al., 2006); both recent and ancient events occur extensively in plants, particularly in lineages such as the angiosperms.