Our Logo

The IGBB logo features a stylized "pinwheel" to the left of the letters IGBB in caps in a modified Bank Gothic Pro font.

The six-part "pinwheel" in the IGBB logo is:

A symbol of lab unity as it shows "parts" coming together to make a "whole."
A flower or three-leaf clover representing (a) plants, important subjects of our research, (b) life in general, and (c) the life sciences (biology).
A set of chromosomes being moved towards the center of a cell.
The Sun - another symbol of life.
A protein composed of six subunits (e.g., a protein pore).
Three foxes putting their heads together. The fox is a symbol of cleverness in Western folklore. Since the IGBB is organized into three service groups (Genomics, Proteomics/Metabolomics, and Biocomputing/Computational Biology), the foxes could represent the three disciplines working together.
A scientist jumping for joy after making an important discovery.
A windmill, the primary symbol associated with Cervantes' famous character Don Quixote - Like Don Quixote, scientists must be willing to attack 'wicked giants' (e.g., ignorance, racism, sexism, intolerance, use of the term 'science' in the promotion of non-scientific causes), champion worthy causes (e.g., education, intellectual freedom, human rights, environmental responsibility), and remain optimistic in the face of defeat (e.g., most days in the lab). Hopefully, however, the average scientist can accomplish these tasks without becoming delusional (a problem that squashed Quixote's dreams of becoming a plant molecular biologist).
A DNA double-helix or protein in cross section.
Antibodies binding to a protein.
Whatever you want it to be.

Agricultural & Biological Engineering Animal & Dairy Sciences Biochem., Mol. Biol., Entomol. & Plant Pathol. Chemistry Forestry Plant & Soil Sciences Sustainable Bioproducts

Agricultural Economics Comparative Biomedical Sciences (CVM) Biological Sciences Food Sci., Nutrition & Health Promotion Pathobiol. & Population Med. (CVM) Poultry Science Wildlife, Fisheries & Aquaculture

Dr. Daniel G. Peterson (Dan)

Director & Professor
DIRECTOR
email
(662) 325-2747
Portera 131A

Repeated polyploidization of Gossypium genomes and the evolution of spinnable cotton fibres

High Impact Research

IGBB Authors:
Daniel G. Peterson, Kurt C. Showmaker, William S. Sanders

PUBLICATION YEAR: 2012
IMPACT FACTOR: 23.866
CITATION COUNT: 1029

Paterson AH, Wendel JF, Gundlach H, Guo H, Jenkins J, Jin D, Llewellyn D, Showmaker KC, Shu S, Udall J, Yoo MJ, Byers R, Chen W, Doron-Faigenboim A, Duke MV, Gong L, Grimwood J, Grover C, Grupp K, Hu G, Lee TH, Li J, Lin L, Liu T, Marler BS, Page JT, Roberts AW, Romanel E, Sanders WS, Szadkowski E, Tan X, Tang H, Xu C, Wang J, Wang Z, Zhang D, Zhang L, Ashrafi H, Bedon F, Bowers JE, Brubaker CL, Chee PW, Das S, Gingle AR, Haigler CH, Harker D, Hoffmann LV, Hovav R, Jones DC, Lemke C, Mansoor S, Rahman M, Rainville LN, Rambani A, Reddy UK, Rong JK, Saranga Y, Scheffler BE, Scheffler JA, Stelly DM, Triplett BA, Van Deynze A, Vaslin MF, Waghmare VN, Walford SA, Wright RJ, Zaki EA, Zhang T, Dennis ES, Mayer KF, Peterson DG, Rokhsar DS, Wang X, Schmutz J (2012) Repeated polyploidization of Gossypium genomes and the evolution of spinnable cotton fibres. Nature 492(7429): 423-427.

DOI: 10.1038/nature11798
EID: 2-s2.0-84871428041
PMID: 23257886

DOWNLOAD PDF

ABSTRACT
Polyploidy often confers emergent properties, such as the higher fibre productivity and quality of tetraploid cottons than diploid cottons bred for the same environments. Here we show that an abrupt five- to sixfold ploidy increase approximately 60 million years (Myr) ago, and allopolyploidy reuniting divergent Gossypium genomes approximately 1-2 Myr ago, conferred about 30-36-fold duplication of ancestral angiosperm (flowering plant) genes in elite cottons (Gossypium hirsutum and Gossypium barbadense), genetic complexity equalled only by Brassica among sequenced angiosperms. Nascent fibre evolution, before allopolyploidy, is elucidated by comparison of spinnable-fibred Gossypium herbaceum A and non-spinnable Gossypium longicalyx F genomes to one another and the outgroup D genome of non-spinnable Gossypium raimondii. The sequence of a G. hirsutum A(t)D(t) (in which 't' indicates tetraploid) cultivar reveals many non-reciprocal DNA exchanges between subgenomes that may have contributed to phenotypic innovation and/or other emergent properties such as ecological adaptation by polyploids. Most DNA-level novelty in G. hirsutum recombines alleles from the D-genome progenitor native to its New World habitat and the Old World A-genome progenitor in which spinnable fibre evolved. Coordinated expression changes in proximal groups of functionally distinct genes, including a nuclear mitochondrial DNA block, may account for clusters of cotton-fibre quantitative trait loci affecting diverse traits. Opportunities abound for dissecting emergent properties of other polyploids, particularly angiosperms, by comparison to diploid progenitors and outgroups.

More High Impact Papers

The IGBB is supported, in part, by the following units:

Missisippi Agricultural & Forestry Experiment Station - MAFES

Office of Research & Economic Development - ORED

Division of Agriculture, Forestry & Veterinary Medicine - DAFVM

The IGBB is an HPC² member center.