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ARS Home » Southeast Area » Stoneville, Mississippi » Crop Genetics Research » Research » Publications at this Location » Publication #360867
Research Project: Introgression of Novel Resistant Genes and Development of Integrated Production Systems for Managing Reniform Nematodes in Cotton

Location: Crop Genetics Research

Title: Characterizing resistance to reniform nematode in accessions of Gossypium barbadense based on classical growth analysis

Author
item SINGH, BHUPINDER - Mississippi State University
item CHASTAIN, DARYL - Mississippi State University
item SNIDER, JOHN - University Of Georgia
item REDDY, K. RAJA - Mississippi State University
item KRUTZ, LARRY - Mississippi State University
item Stetina, Salliana - Sally

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 2/3/2019
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Development of resistant cotton cultivars is in progress to reduce cotton losses attributed to reniform nematode, which causes up to 8% reduction in cotton production every year in the U.S. A two-year field experiment was conducted to evaluate responses of two newly developed reniform nematode resistant cotton lines (accessions of Gossypium barbadense; 08SS110-NE06.OP and 08SS100) along with two commercial cotton cultivars (Deltapine 16 and PHY 490 W3FE) to reniform nematode infection using classical growth and development. All four genotypes were grown in field plots that had a reniform nematode population exceeding the economic threshold for Mississippi. Various growth and development traits of all four genotypes were measured through destructive harvesting of two meter row lengths at two-week intervals following fourth leaf stage. In addition, soil samples were taken from the top 15 cm soil depth in the plots during planting and harvesting for reniform nematode population counts. The results showed that reniform nematode resistant cotton lines had significantly greater plant height, dry weights, and leaf area index than commercial cotton cultivars. The resistant line 08SS110-NE06.OP showed higher lint yields than commercial cultivars in both the years. The reniform nematode population was significantly reduced at the end of the season in the plots where resistant lines were grown, compared to commercial cultivars. Greater vigor and lower nematode infestation might have contributed to increased yields in the resistant lines compared to commercial cultivars. The study provided useful information to breeding programs about the agronomic characteristics of the novel resistant cotton lines under reniform nematode infested field conditions.