|Campbell, Benjamin - Todd|
|Hayes, Russell - Russ|
|WU, JIXIANG - South Dakota State University|
|STELLY, DAVID - Texas A&M University|
Submitted to: Euphytica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/4/2017
Publication Date: 4/21/2017
Publication URL: http://handle.nal.usda.gov/10113/5726303
Citation: Jenkins, J.N., Mccarty Jr, J.C., Campbell, B.T., Hayes, R.W., Wu, J., Saha, S., Stelly, D.M. 2017. Genotypic comparisons of chromosomes 01, 04 and 18 from three tetraploid species of gossypium in topcrosses with five elite cultivars of G. hirsutum L. Euphytica. 213:107.
Interpretive Summary: Chromosome substitution lines (CSL) have been developed for several chromosomes or chromosome segments from two tetraploid species of Gossypium and have been shown to be effective ways to introgress useful alleles from wild tetraploid species into Upland, G. hirsutum L. (Stelly et al., 2005). The contributions of specific chromosomes from different tetraploid species when crossed with modern elite germplasm are of great interest for their ultimate utility in plant breeding. Most research of this type has been with CSL from G. barbadense L. (CS-B) crossed to five cultivars.. A summary of useful additive alleles from CS-B lines show specific CS-B chromosomes or chromosome arms have alleles for improvement of lint yield, boll weight, lint percentage, fiber upper half mean length, strength, length uniformity, micronaire, and elongation (Jenkins et al., 2006; Jenkins et al., 2007; Jenkins et al., 2012; Jenkins et al., 2013; Zhang et al., 2014) Additive and dominance genetic effects data from chromosomes 01, 04, and 18 from G. barbadense, G. tomentosum Nuttall ex Seemann, and G. hirsutum when crossed with five diverse commercial cultivars are reported in (Jenkins et al. submitted 2016). Genotypic mean effects comparisons of these same chromosomes 01, 04, and 18 from G. barbadense, G. tomentosum Nuttall ex Seemann, and G. hirsutum when crossed with five diverse commercial cultivars are reported in this manuscript.
Technical Abstract: Upland cotton, Gossypium hirsutum L. is planted on most of the hectareage of cultivated cotton in the United States and the world. The cultivated tetraploid species G. barbadense L. produces extra long, strong, and fine fibers. Breeders would like to move fiber quality alleles from this species into cultivated Upland cotton, but long term efforts have not been successful using whole genome crosses between the species. The wild cotton tetraploid species G. tomentosum Nuttall ex Seemann, native to the Hawaiian Archipelago also exhibits traits that would also be desirable to transfer to Upland cotton. Our chromosome substitution lines (CSL) have one chromosome or chromosome arm from an alien species backcrossed into the Upland cotton line,TM-1, via aneuploid technology. Five upland cultivars were crossed with CS-B01, CS-T01, CS-B04, CS-T04, CS-B18 and CS-T18 and TM-1 the recurrent parent of the CSLs. This provided an opportunity to determine the effects of chromosomes 01, 04, and 18 from the three species in crosses with the five cultivars. Predicted genotypic mean effects of the parents, F2, and F3 generations for eight agronomic and fiber traits of importance are compared. The predicted hybrid mean effects for the three chromosomes from each species were different for several of the traits across cultivars. There was no single chromosome or species that was superior for all traits in crosses. Parental and hybrid lines often differed in the effect of a particular chromosome among the three species.