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ARS Home » Southeast Area » Stoneville, Mississippi » Crop Genetics Research » Research » Publications at this Location » Publication #343689

Research Project: Introgression of Novel Resistant Genes and Development of Integrated Production Systems for Managing Reniform Nematodes in Cotton

Location: Crop Genetics Research

Title: Progress in Development of Reniform Resistant Germplasm Developed from BARBREN-713

item WALLANCE, TED - Mississippi State University
item GAUDIN, AMANDA - Mississippi State University
item Stetina, Salliana - Sally
item Scheffler, Jodi

Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: 1/4/2017
Publication Date: 7/1/2017
Citation: Wallance, T., Gaudin, A., Stetina, S.R., Scheffler, J.A. 2017. Progress in Development of Reniform Resistant Germplasm Developed from BARBREN-713. National Cotton Council Beltwide Cotton Conference. Pg. 518.

Interpretive Summary:

Technical Abstract: Following the release of new reniform nematode (Rotylenchulus reniformis Linford and Oliveira) resistant upland cotton (Gossypium hirusutm L.) germplasm lines, such as BARBREN-713, breeding efforts were initiated in 2011 with the goal of improving both yield and fiber quality performance in reniform resistance germplasm. Populations were developed from crossing G. barbadense derived reniform resistant upland germplasm lines with susceptible breeding lines and obsolete varieties. Marker assisted selection (MAS) within segregating F2 populations was employed to identify individual plants possessing resistance genes Renbarb1 and Renbarb2. Plants with a low lint percentage (<35%) were discarded prior to planting each F2 plant to a progeny row the following year. In F3 and later generations (F3-F6), the best looking plants possessing resistance genes Renbarb1 and Renbarb2 within each progeny row were bulked, ginned, and evaluated for fiber quality. Bulk selections provided sufficient seed for replicated yield testing in subsequent generations (F4-F6). In 2016, 11 F6 reniform resistant breeding lines, 5 conventional susceptible commercial varieties, and resistant germplasm line BARBREN-713 were evaluated in a replicated yield trial at Mississippi State University. Reniform resistant breeding line MSU1113-2459 produced a significantly greater yield than any other entry in the trial. Four resistant breeding lines produced yields significantly greater than BARBREN-713. Lint percentage, fiber length (UHM), and fiber strength for all breeding lines were significantly higher than BARBREN-713. When compared to the commercial varieties, average fiber length of resistant breeding lines was lower, suggesting that future selections should concentration on improvements in fiber length. Fiber testing of individual (MAS) plant selections in the next generation will be undertaken in the effort to develop a reniform resistant germplasm line with competitive agronomic traits.