Understanding the evolutionary consequences of polyploidy and the biological complexity of hybrid vigor or heterosis is a key challenge for geneticists and biologists in the post–genomic era. They share the common aspect that they result from bringing together different genomes. Polyploidy and hybrid vigor have implications for biological diversity, species survival, and trait improvement. Grasping the genomic and molecular underpinning of polyploidy and heterosis could have a significant impact in numerous fields ranging from evolutionary biology, computational biology, genetics, epigenetics, and biotechnology. Moreover, they will no doubt impact the development of sustainable food and biofuel production. Polyploid and Hybrid Genomics provides a timely synthesis of the latest research in the molecular mechanisms that underlie this important genetic and evolutionary process.
Polyploid and Hybrid Genomics is made up of contributions from leading researchers in the field around the world, providing a global and comprehensive view of the subject. The book is divided into three sections: the first two sections explore the genomics of hybrids and of polyploids, respectively. The final section discusses key mechanisms for novelty in polyploids and hybrids.
Providing broad–ranging coverage, and up–to–date information, Polyploid and Hybrid Genomics will be an invaluable resource for geneticists, cropscientists, and evolutionary biologists alike.
Section I Genomics of Hybrids 1
1 Yeast Hybrids and Polyploids as Models in Evolutionary Studies 3Avraham A. Levy, Itay Tirosh, Sharon Reikhav, Yasmin Bloch, and Naama Barkai
2 Transcriptome Profiling of Drosophila Interspecific Hybrids: Insights into Mechanisms of Regulatory Divergence and Hybrid Dysfunction 15Jos´e M. Ranz, Shu–Dan Yeh, Kevin G. Nyberg, and Carlos A. Machado
3 cis– and trans–Regulation in Drosophila Interspecific Hybrids 37Joseph D. Coolon and Patricia J. Wittkopp
4 Gene Expression and Heterosis in Maize Hybrids 59Mei Guo and J. Antoni Rafalski
5 Integrating Omics Data and Expression QTL to Understand Maize Heterosis 85Camille Rustenholz and Patrick S. Schnable
6 Genomics and Heterosis in Hexaploid Wheat 105Zhongfu Ni, Yingyin Yao, Huiru Peng, Zhaorong Hu, and Qixin Sun
7 Progress of Genomics and Heterosis Studies in Hybrid Rice 117Lei Zhang, Yonggang Peng, Yang Dong, Hongtao Li, Wen Wang, and Zhen Zhu
8 Heterosis: The Case for Single–Gene Overdominance 137Katie L. Liberatore, Ke Jiang, Dani Zamir, and Zachary B. Lippman
Section II Genomics of Polyploids 153
9 Genomics and Transcriptomics of Photosynthesis in Polyploids 155Jeremy E. Coate and Jeff J. Doyle
10 Chromosomal and Gene Expression Changes in Brassica Allopolyploids 171Eric Jenczewski, A.M. Ch`evre, and K. Alix
11 Dynamics of Duplicated Gene Expression in Polyploid Cotton 187Keith L. Adams and Jonathan F. Wendel
12 Reprogramming of Gene Expression in the Genetically Stable Bread Allohexaploid Wheat 195Dominique Arnaud, Houda Chelaifa, Joseph Jahier, and Boulos Chalhoub
13 Nucleocytoplasmic Interaction Hypothesis of Genome Evolution and Speciation in Polyploid Plants Revisited: Polyploid Species–Specific Chromosomal Polymorphisms inWheat 213Bikram S. Gill and B. Friebe
Section III Mechanisms for Novelty in Hybrids and Polyploids 223
14 Genes Causing Postzygotic Hybrid Incompatibility in Plants: A Window into Co–Evolution 225Kirsten Bomblies
15 Meiosis in Polyploids 241Graham Moore
16 Genomic Imprinting: Parental Control of Gene Expression in Higher Plants 257Peter C. McKeown, Antoine Fort, and Charles Spillane
17 Seed Development in Interploidy Hybrids 271Roderick J. Scott, Julia L. Tratt, and Ahmed Bolbol
18 Chromatin and Small RNA Regulation of Nucleolar Dominance 291Pedro Costa–Nunes and Olga Pontes
19 Genetic Rules of Heterosis in Plants 313James A. Birchler
20 Chromatin and Gene Expression Mechanisms in Hybrids 323Guangming He and Xing–Wang Deng
21 Genetic and Epigenetic Mechanisms for Polyploidy and Hybridity 335Z. Jeffrey Chen and Helen H. Yu
A color plate is located between pages 174 and 175.