The Sorghum bicolor genome and the diversification of grasses

Paterson, A.H. and Bowers, J.E. and Bruggmann, R. and Dubchak, I. and etl, . (2009) The Sorghum bicolor genome and the diversification of grasses. Nature, 457 (7229). pp. 551-556.

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Sorghum, an African grass related to sugar cane and maize, is grown for food, feed, fibre and fuel. We present an initial analysis of the,730-megabase Sorghumbicolor (L.) Moench genome, placing,98% of genes in their chromosomal context using whole-genome shotgun sequence validated by genetic, physical and syntenic information. Genetic recombination is largely confined to about one-third of the sorghum genome with gene order and density similar to those of rice. Retrotransposon accumulation in recombinationally recalcitrant heterochromatin explains the ,75% larger genome size of sorghum compared with rice. Although gene and repetitive DNA distributions have been preserved since palaeopolyploidization ,70 million years ago, most duplicated gene sets lost one member before the sorghum–rice divergence. Concerted evolution makes one duplicated chromosomal segment appear to be only a few million years old. About 24% of genes are grass-specific and 7% are sorghum-specific. Recent gene and microRNA duplications may contribute to sorghum’s drought tolerance.

Item Type: Article
Uncontrolled Keywords: Sorghum bicolor, diversification, grasses, genome
Author Affiliation: Plant Genome Mapping Laboratory, University of Georgia, Athens, Georgia 30602, USA
Subjects: Crop Improvement
Divisions: Sorghum
Depositing User: Mr T L Gautham
Date Deposited: 24 Sep 2018 04:45
Last Modified: 24 Sep 2018 04:45

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