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ARS Home » Southeast Area » Mississippi State, Mississippi » Crop Science Research Laboratory » Genetics and Sustainable Agriculture Research » Research » Publications at this Location » Publication #412270
Research Project: Enhancing Agronomic Traits, Fiber Quality, and Resistance to Environmental Stress, Nematodes, and Fungal Diseases in Cotton

Location: Genetics and Sustainable Agriculture Research

Title: Registration of upland cotton RILs MS-4857 and MS-4878 with resistance to root-knot nematode and reniform nematode

Author
item Wubben, Martin
item McCarty, Jack
item Hayes, Russell - Russ
item CALLAHAN, FRANKLIN - Retired ARS Employee
item Deng, Dewayne
item Jenkins, Johnie

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/11/2024
Publication Date: 5/11/2024
Citation: Wubben, M., Mccarty Jr, J.C., Hayes, R.W., Callahan, F.E., Deng, D.D., Jenkins, J.N. 2024. Registration of upland cotton RILs MS-4857 and MS-4878 with resistance to root-knot nematode and reniform nematode. Journal of Plant Registrations. 2024;1-5. https://doi.org/10.1002/plr2.20379.
DOI: https://doi.org/10.1002/plr2.20379

Interpretive Summary: Cotton yield is annually reduced because of infection by the root pathogens RKN (root-knot nematode) and RN (reniform nematode). Cotton lines that are resistant to these pathogens would be of great usefulness to the cotton breeding community and help cotton producers maximize yields. Here, we describe the release of two lines of upland cotton that are resistant to both RKN and RN. The RN resistance expressed by the lines is derived from the upland species Gossypium hirsutum, and is different from the RN resistance currently available to producers. The availability of multiple sources of nematode resistance to cotton breeders will facilitate the deployment of different resistance genes and help prolong the utility of all resistance sources.

Technical Abstract: The root-knot (RKN; Meloidogyne incognita Kofoid & White) and reniform (RN; Rotylenchulus reniformis Linford & Oliveira) nematodes are serious pathogens of upland cotton (Gossypium hirsutum L.) that significantly impact yield and fiber quality annually. Here, we describe two upland cotton germplasm lines that have combined resistance to RKN and RN while maintaining good yield and fiber quality traits. Upland germplasm lines MS-4857 (Reg. No. xxx, PI xxxxx) and MS-4878 (Reg. No. xxx, PI xxxxx) are F6 RILs from a cross between M240 RNR (RKN resistant) and MT2468 Ren1 (moderately RN resistant). These lines are highly resistant to RKN and show approximately 30% fewer RN eggs g-1 root than the MT2468 Ren1 parent due to significantly improved root system development compared to MT2468 Ren1. Yield and fiber quality traits are equivalent or superior to the parental lines. The upland-derived RN resistance in these lines provides a valuable alternative source of resistance to cotton breeding programs, especially in combination with high level RKN resistance.