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Registration of 17 upland (Gossypium hirsutum) cotton germplasm lines disomic for different G. barbadense chromosome or arm substitutions
- Stelly, D.M., Saha, S., Raska, D.A., Jenkins, J.N., McCarty, J.C. Jr., Gutierrez, O.A.
- Crop science 2005 v.45 no.6 pp. 2663
- Gossypium hirsutum, Gossypium barbadense, cotton, germplasm, germplasm releases, plant genetic resources, fiber crops, substitution lines, interspecific hybridization, hybrids, plant breeding, backcrossing, inbred lines, introgression, agronomic traits, Texas, Mississippi
- Seventeen germplasm lines (Reg. no. GP-836 through GP-852, PI 636346 to PI 636362) were each developed by hypoaneuploid-based backcross substitution of a different Gossypium barbadense chromosome or chromosome segment into a Gossypium hirsutum genetic background by the Texas Agricultural Experiment Station, the USDA-ARS and the Mississippi Agricultural and Forestry Experiment Station, and released in 2004. The substitution lines are genetically similar to TM-1, an Upland cotton (G. hirsutum) genetic standard, and to each other, except that each line differs by the replacement of a specific homologous pair of chromosomes or chromosome segments from the donor line 3-79, a G. barbadense genetic standard. TM-1 is an inbred line extracted from the commercial cultivar Deltapine 14 and has been maintained over 40 generations by self-pollination. Line 3-79 originated as a doubled-haploid from G. barbadense. The high fibre quality and genetic uniformity of 3-79 and the availability of hypoaneuploid stocks in TM-1 background influenced the choice of parental lines. The 17 germplasm lines were released because attempts to incorporate genes from G. barbadense for exceptional fibre length, strength and fineness into Upland cotton have generally not achieved stable introgression.