Toward Sequencing Cotton (Gossypium) Genomes: Figure 1.

Abstract

Despite rapidly decreasing costs and innovative technologies, sequencing of angiosperm genomes is not yet undertaken lightly. Generating larger amounts of sequence data more quickly does not address the difficulties of sequencing and assembling complex genomes de novo. The cotton (Gossypium spp.) genomes represent a challenging case. To this end, a coalition of cotton genome scientists has developed a strategy for sequencing the cotton genomes, which will vastly expand opportunities for cotton research and improvement worldwide.

Sequencing of allotetraploid cotton (Gossypium hirsutum L. acc. TM-1) provides a resource for fiber improvement

“…These data suggest that fiber-related genes in the A subgenome contribute to fiber improvement, which is consistent with the phenotype in the A progenitor but not in the D progenitor. Previous studies on fiber-related QTLs within the D subgenome could be related to trans-acting and/or epistatic effects 1 .…”

“…Texas Marker-1 (TM-1), which is widely used as a genetic standard 1,10 . We generated a genome sequence containing two-to about fourfold longer sequence scaffolds (N50 = 1,600 kb) than that produced for other allopolyploid species Brassica napus (N50 = 764 kb) 9 , Nicotiana tabacum sequencing of allotetraploid cotton (Gossypium hirsutum l. acc.…”

The draft genome of a diploid cotton Gossypium raimondii

“…Diploid cotton species share a common chromosome number (n = 13), and high levels of synteny or colinearity are observed among them [9][10][11][12] . The tetraploid cotton species (2n = 4× = 52), such as G. hirsutum L. and Gossypium barbadense L., are thought to have formed by an allopolyploidization event that occurred approximately 1-2 million years ago, which involved a D-genome species as the pollen-providing parent and an A-genome species as the maternal parent 13,14 . To gain insights into the cultivated polyploid genomes-how they have evolved and how their subgenomes interact-it is first necessary to have a basic knowledge of the structure of the component genomes.…”

Construction of a linkage map and QTL mapping for fiber quality traits in upland cotton (Gossypium hirsutum L.)

“…Cultivated types include two diploids, Gossypium herbaceum L. (A1) and Gossypium arboreum L. (A2), and two tetraploids, Gossypium hirsutum L. (AD1) and Gossypium barbadense L. (AD2). Of these, upland cotton (G. hirsutum) dominates the production of cotton fiber and accounts for 95% of the world's total production of cotton [2].…”