Location: Crop Genetics ResearchTitle: Identification of Rotylenchulus reniformis resistant Glycine lines Author
Submitted to: Journal of Nematology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/9/2014
Publication Date: 3/18/2014
Citation: Stetina, S.R., Smith, J.R., Ray, J.D. 2014. Identification of Rotylenchulus reniformis resistant Glycine lines. Journal of Nematology. 46:1-7. Interpretive Summary: Reniform nematode is a microscopic worm that causes economic losses in soybean and other crops by feeding on plant roots. With more soybean grown in fields where this worm is present at damaging levels, it is important to identify plants that can resist infection. Sixty-one wild and domestic soybean lines were tested and 6 new resistant lines were found: released germplasm lines DS4-SCN05 (PI 656647) and DS-880 (PI 659348); accession PI 567516 C; and breeding lines DS97-84-1, 02011-126-1-1-2-1 and 02011-126-1-1-5-1. Soybean breeders can use these lines to develop new soybean cultivars with resistance to reniform nematode.
Technical Abstract: Identification of resistance to reniform nematode (Rotylenchulus reniformis) is the first step in developing resistant soybean (Glycine max) cultivars that will benefit growers in the Mid South. This study was conducted to identify soybean (G. max and G. soja) lines with resistance to this pathogen. Sixty-one wild and domestic soybean lines were evaluated in replicated growth chamber tests. Six previously untested soybean lines with useful levels of resistance to reniform nematode were identified in both initial screening and subsequent confirmation tests: released germplasm lines DS4-SCN05 (PI 656647) and DS-880 (PI 659348); accession PI 567516 C; and breeding lines DS97-84-1, 02011-126-1-1-2-1 and 02011-126-1-1-5-1. Eleven previously untested moderately susceptible or susceptible lines were also identified: released germplasm lines D68-0099 (PI 573285) and LG01-5087-5; accessions PI 200538, PI 416937, PI 423941, PI 437697, PI 467312, PI 468916, PI 594692, and PI 603751 A; and cultivar Stafford (PI 508269). Results of previously-tested lines evaluated in the current study agreed with published reports 69.6% of the time for resistant lines and 87.5% of the time for susceptible lines. Soybean breeders may benefit from incorporating the newly-identified resistant lines into their breeding programs.