Euphytica (2020) 216 (4 - 67)

Amanda G. Gaudin, Ted P. Wallace, Jodi A. Scheffler, Salliana R. Stetina and Martin J. Wubben (2020)
Effects of combining Ren^lon with Ren^barb1 and Ren^barb2 on resistance of cotton (Gossypium hirsutum L.) to reniform nematode (Rotylenchulus reniformis Linford and Oliveria)
Euphytica 216 (4 - 67)
Abstract: The upland cotton (Gossypium hirsutum L.) germplasm lines BARBREN-713, having the Ren^barb1 and Ren^barb2 quantitative trait loci (QTL), and LONREN, carrying the Ren^lon QTL, have introgressed resistance to reniform nematode (Rotylenchulus reniformis Linford and Oliveria). Stunting has been observed in the LONREN source of resistance when subjected to heavy nematode pressure but not for BARBREN-713. To investigate the potential to reduce stunting in the LONREN source of resistance, cotton lines were developed with different combinations of reniform nematode resistance QTL from LONREN and BARBREN-713. Marker assisted selection was conducted to identify the following QTL combinations: (1) Ren^barb1 + Ren^barb2, (2) Ren^barb1 + Ren^barb2 + Ren^lon, (3) Ren^barb2 + Ren^lon, (4) Ren^barb1 + Ren^lon, (5) Ren^barb1 alone, (6) Ren^barb2 alone, (7) Ren^lon alone, and (8) a Null susceptible genotype. QTL combinations were inoculated with 0, 2300, or 5000 reniform nematodes per 120 cm³ soil in growth chamber tests. Plants were harvested at 60 days after inoculation, plant growth measurements made, and the nematode reproduction factor calculated. In this study, the Ren^barb1 genotype was scored as susceptible to reniform nematode. Combining Ren^lon with Ren^barb2 did not improve resistance to reniform nematode; however, the Ren^barb2/Ren^lon combination showed improved growth compared to LONREN-1, BARBREN-713, and the susceptible null check.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Jodi A. Scheffler, Salliana R. Stetina, Martin J.E. Wubben

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rotylenchulus reniformis	Cotton (Gossypium)