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Crop Science 42:1385-1386 (2002)
© 2002 Crop Science Society of America

REGISTRATION OF GERMPLASM

Registration of AR91017 Winter Rapeseed Germplasm

R.K. Bacon*,a, J.T. Kellya and C.E. Parsonsb

a Dep. of Crop, Soil and Environmental Sciences, Univ. of Arkansas, Fayetteville, AR 72701
b Dep. of Crop, Soil and Environmental Sciences, Univ. of Arkansas, Lonoke, AR 72086

* Corresponding author (rbacon{at}uark.edu)

AR91017 (Reg. no. GP-8, PI 619618) winter rapeseed [Brassica napus L. subsp. oleifera (Metzg.) Sinsk. f. biennis] was developed as a canola-quality germplasm line by the Arkansas Agricultural Experiment Station and released in 2001. This line was released for its yield potential and broad adaptation in the southeastern and midwestern USA.

AR91017 was derived from a single plant selection in the F5 generation from the cross ‘CX W03’/‘Falcon’. The cross was made by personnel of Jacob Hartz Seed Co. (a unit of Monsanto Company, St. Louis, MO) and was among the segregating families donated to the University of Arkansas. The single plant selection was advanced, open-pollinated in the vicinity of sister lines for a year at Kibler, AR, in a non-replicated yield trial. The F6 line was tested in replicated yield trials from 1996 to 2000 as AR91017-44E-5. AR91017 out-yielded AR91004 (Bacon and Kelly, 2000), 2566 vs. 2223 kg ha-1, respectively, in Arkansas breeding trials representing 8 location years from 1996 to 2000.

AR91017 was also tested in the 1999 and 2000 National Winter Canola Variety Trials coordinated by Kansas State University (Table 1). The 1999 trial reported data from 18 locations (Rife, 2000); the 2000 trial reported data from 24 locations (Rife, 2001). The yield data in Table 1 represents the combined yield of locations within a region for both years. ‘Jetton’ and ‘Ceres’ have consistently been among the highest yielding winter canola genotypes and ‘Wichita’ (Rife et al., 2001) and ‘Plainsman’ (Rife et al., 2000) are recently released cultivars with similar adaptation. AR91017 produced grain yield similar to those cultivars (Table 1).


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  		Table 1. Seed yields in the National Winter Canola Variety Trial in 1999 and 2000.

 
Agronomic data from the National Winter Canola Variety Trials indicate that AR91017 is similar in maturity, approximately 3 cm taller, has a lower test weight (564 vs. 584 kg m-3), slightly higher oil content (399 g kg-1 vs. 383 g kg-1), and slightly higher winter survival (90.4 vs. 85.1%) relative to Wichita (Rife et al., 2001). The seeds are black and weigh 3.8 g per 1000. The most threatening disease of canola in the Southeast U.S. is probably blackleg [caused by Leptosphaeria maculans (Desmaz.)]. This disease has caused severe losses in production in Georgia and the Southeast as well as in other canola producing regions such as Australia. AR91017 has good blackleg resistance with a rating in the 2000 National Winter Canola Variety Trials of 10% which is similar (LSD0.10 = 10%) to Wichita (12%) and Jetton (17%).

Analyses performed by the Central Analytical Laboratory at the Poultry Science Center, University of Arkansas indicated that seed of AR91017 had an oil quality of less than 10 g kg-1 erucic acid allowing it to be classified as canola. The fatty acid profile of AR91017 was similar to seed of Ceres. Tests in our laboratory show that the meal of AR91017 has a low glucosinolate content (Tes-tape score of <=0.5 units, on a scale of 0–5) (Smith and Donald, 1988).

This germplasm should be useful for breeding winter canola-quality rapeseed cultivars adapted to the central and southern USA. Breeder seed of AR91017 will be maintained and distributed by the Arkansas Agricultural Experiment Station. Small quantities of seed will be available upon written request to the corresponding author. Programs receiving seed will be asked to make appropriate recognition of the source of the germplasm if used in development of parental lines, cultivars, or hybrids.

NOTES

Published with the approval of the Director, Arkansas Agric. Exp. Stn., manuscript #01038. Registration by CSSA.

Accepted for publication January 31, 2002.

REFERENCES





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Journal of Natural Resources
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