COMBINING CONVENTIONAL AND MOLECULAR TECHNIQUES TO IMPROVE SEED COTTON VALUE
Location: Crop Genetics Research Unit
Title: Registration of GVS1 GVS2 and GVS3 upland cotton lines with varying gland densities and two near isogenic lines GVS4 and GVS5
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 10, 2012
Publication Date: May 2, 2012
Citation: Scheffler, J.A., Romano, G.B. 2012. Registration of GVS1 GVS2 and GVS3 upland cotton lines with varying gland densities and two near isogenic lines GVS4 and GVS5. Journal of Plant Registrations. 6:190-194.
Interpretive Summary: Glands, containing a chemical called gossypol, are found throughout the cotton plant and protect the plant from pests and diseases. Cotton seed is a good source of high quality oil and protein; however, gossypol, is a detrimental compound in cotton seed that decreases the value of cotton seeds and limits their use to ruminants such as dairy cows. A set of five upland (Gossypium hirsutum L.) cotton germplasm lines were developed and released by Agricultural Research Service, Stoneville, MS. These five lines include three semi-glanded with varying gland densities and seed gossypol content, a totally glanded line and a totally glandless line all in the same genetic background. These lines will be valuable tools for laboratory and field based studies, such as insect preference and resistance studies. The lines will also provide public and private breeders with genetic resources to develop low seed gossypol lines while maintaining protective glands on the plant. Low seed gossypol lines will improve the feeding value of cottonseed and provide a marketable seed product in addition to the fiber.
A set of five upland (Gossypium hirsutum L.) cotton germplasm lines, GVSl (Reg. No., PI), GVS2 (Reg. No., PI), GVS3 (Reg. No., PI), GVS4 (Reg. No., PI), and GVS5 (Reg. No., PI) were developed and released by Agricultural Research Service, Stoneville, MS in August 2009. These five lines include three semi-glanded lines (GVS1, GVS2, GVS3) with varying gland densities and seed gossypol content, a totally glanded line (GVS4) and a totally glandless line (GVS5): all in the same genetic background. In the F11 the seed gossypol content of GVS1, GVS2 and GVS3 was 0.81, 0.49, and 0.50% of the total seed weight, respectively. The parental line Stoneville 7A glanded had 1.54% and the Stoneville 7A glandless had 0.00% seed gossypol. The near isogenic lines (NILs) GVS4 and GVS5 had 1.51% and 0.00% seed gossypol. GVS1, GVS2 and GVS3 have stem glanding similar to the glanded parent. Calyx glanding is normal in GVS1 and GVS3 while GVS2 has a 17% reduction. Boll glanding scores were 67% (GVS1), 60% (GVS2) and 59% (GVS3) of the glanded parent. In the semi-glanded lines, leaf glanding was reduced at the end of the growing season, but the leaves were always glanded on veins and margins. Yield was evaluated and fiber properties were similar to the parents and check lines. These lines will be valuable tools for mapping projects, host plant resistance studies and a genetic resource to develop low seed gossypol lines.