|Bell, Alois - Al|
|ROBINSON, FOREST - Retired ARS Employee|
|PROM, SANDRIA - Texas A&M University|
|SALADINO, VINCE - Texas A&M University|
|ZHENG, XIUTING - Texas A&M University|
|STELLY, DAVID - Texas A&M University|
|NICHOLS, ROBERT - Cotton, Inc|
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/31/2023
Publication Date: 7/19/2023
Citation: Bell, A.A., Robinson, A.F., Quintana, J., Hinze, L.L., Harris, J.N., Liu, J., Wagner, T.A., Prom, S., Saladino, V., Zheng, X., Stelly, D.M., Nichols, R.L. 2023. Registration of eight germplasm lines of Upland cotton resistant to nematodes with elite agronomic performance. Journal of Plant Registrations. https://doi.org/10.1002/plr2.20290.
Interpretive Summary: Eight new germplasm lines were developed and are being submitted for registration and inclusion in the National Cotton Germplasm Collection. All lines have high levels of resistance to reniform nematodes and four have moderate resistance to root-knot nematodes. When grown in nematode-infested fields the lines produced yields and fiber quality equal to or greater than many of the elite commercial varieties that were included in the evaluation. The new germplasm lines should be useful for breeders in developing new cotton varieties that are resistant to plant parasitic nematodes without sacrificing yield and fiber quality traits.
Technical Abstract: Cotton (Gossypium hirsutum L.) germplasm lines BARBREN-713-8, BARBREN-713-11, BARBREN-713-13 , BARBREN-713-25, BARBREN-713-32, BARBREN-713-33, BARBREN-713-41, and BARBREN-713-48 were developed and released by the USDA-ARS, Texas A&M AgriLife Research, and Cotton Incorporated in 2014. The objective of the release was to provide breeders with agronomically elite germplasm that is resistant to reniform nematode. Four lines (BARBREN-713-8, -32, -33 and -48) also have markers for the Mi-1 or Mi-2 gene for resistance to root-knot nematode. The lines have excellent seedling vigor in fields infested with both nematode and fungal root-rot pathogens. Resistance to reniform nematode was transferred from G. barbadense GB713 (PI 608139) and is associated primarily with the RenGB713 gene on chromosome 21. This gene could be detected with the codominant SSR marker BNL3279_105 or the SNP marker GI-187401. In controlled environment assays, these lines suppressed numbers of nematode eggs by 74-91% (x¯ 82.4%) and vermiform concentrations by 69-84.7% (x¯ 78.1%) compared to ‘Fibermax FM966’. The lines outyielded and had fiber quality equal to or greater than several commercial cultivars.