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Crop domestication frequently began with the selection of plantsthat did not naturally shed ripe fruits or seeds. The reductionin grain shattering that led to cereal domestication involvedgenetic loci of large effect. The molecular basis of this keydomestication transition, however, remains unknown. Here weshow that human selection of an amino acid substitution in thepredicted DNA binding domain encoded by a gene of previouslyunknown function was primarily responsible for the reductionof grain shattering in rice domestication. The substitutionundermined the gene function necessary for the normal developmentof an abscission layer that controls the separation of a grainfrom the pedicel.
Department of Plant Biology, Michigan State University, East Lansing, MI 48824, USA.
* To whom correspondence should be addressed. E-mail: sang{at}msu.edu
Regulating the Regulators: The Future Prospects for Transcription-Factor-Based Agricultural Biotechnology Products.
K. Century, T. L. Reuber, and O. J. Ratcliffe (2008)
Plant Physiology
147, 20-29
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The Role of Regulatory Genes During Maize Domestication: Evidence From Nucleotide Polymorphism and Gene Expression.
Q. Zhao, A.-C. Thuillet, N. K. Uhlmann, A. Weber, J. A. Rafalski, S. M. Allen, S. Tingey, and J. Doebley (2008)
Genetics
178, 2133-2143
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Barley grain with adhering hulls is controlled by an ERF family transcription factor gene regulating a lipid biosynthesis pathway.
S. Taketa, S. Amano, Y. Tsujino, T. Sato, D. Saisho, K. Kakeda, M. Nomura, T. Suzuki, T. Matsumoto, K. Sato, et al. (2008)
PNAS
105, 4062-4067
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Molecular insights into the evolution of crop plants.
J. C. Burger, M. A. Chapman, and J. M. Burke (2008)
Am. J. Botany
95, 113-122
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A Semiparametric Approach for Composite Functional Mapping of Dynamic Quantitative Traits.
R. Yang, H. Gao, X. Wang, J. Zhang, Z.-B. Zeng, and R. Wu (2007)
Genetics
177, 1859-1870
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From Crop Domestication to Super-domestication.
D. A. Vaughan, E. Balazs, and J. S. Heslop-Harrison (2007)
Ann. Bot.
100, 893-901
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HAWAIIAN SKIRT: An F-Box Gene That Regulates Organ Fusion and Growth in Arabidopsis.
Z. H. Gonzalez-Carranza, U. Rompa, J. L. Peters, A. M. Bhatt, C. Wagstaff, A. D. Stead, and J. A. Roberts (2007)
Plant Physiology
144, 1370-1382
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Colloquium Papers: Plant domestication, a unique opportunity to identify the genetic basis of adaptation.
Six-rowed barley originated from a mutation in a homeodomain-leucine zipper I-class homeobox gene.
T. Komatsuda, M. Pourkheirandish, C. He, P. Azhaguvel, H. Kanamori, D. Perovic, N. Stein, A. Graner, T. Wicker, A. Tagiri, et al. (2007)
PNAS
104, 1424-1429
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On the Generalized Poisson Regression Mixture Model for Mapping Quantitative Trait Loci With Count Data.
