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REGISTRATIONS OF CULTIVARS

Registration of ‘Pardee’ Birdsfoot Trefoil

D.R. Viands^a,*, J.E. Miller-Garvin^c, J.L. Hansen^a, G.C. Bergstrom^b, B.P. Tillapaugh^d, C.C. Lowe, E.M. Thomas^a and J.L. Neally^a

^a Department of Plant Breeding, Cornell University, Ithaca, NY 14853
^b Department of Plant Pathology, Cornell University, Ithaca, NY 14853
^c Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108
^d Wyoming Co. Cooperative Extension, 401 N. Main Street, Warsaw, NY 14569

^* Corresponding author (drv3{at}cornell.edu)

‘Pardee’ birdsfoot trefoil (Lotus corniculatus L.) (Reg. no. CV-11, PI 634338) was developed by the Cornell University Agricultural Experiment Station, New York State College of Agriculture and Life Sciences, Cornell University, Ithaca, NY. This cultivar was released in 1999.

Pardee, experimental designation NY 9754, was derived from several birdsfoot trefoil cultivars and plant introductions available in the 1970s. This material was selected by C. Lowe and K. Zeiders (personal communication) for two cycles of recurrent phenotypic selection for resistance to Fusarium wilt (caused by Fusarium oxysporum f. sp. loti Bergstrom and Kalb) in a northern New York field with a history of the disease. Number of plants selected is unknown. This selection was followed by one cycle of phenotypic selection for forage vigor after 1 yr in a spaced planted field nursery in Ithaca, NY, followed by two cycles of recurrent phenotypic selection for resistance to Fusarium wilt after inoculating plants in a greenhouse. In the greenhouse selection, 120 to 150 plants were selected each cycle of selection.

Pardee birdsfoot trefoil is an upright, hay-type cultivar, like ‘Viking’ (PI 310483), but with earlier maturity than both ‘Norcen’ (PI 570670) and Viking. Pardee has about 50% plants resistant to Fusarium wilt, whereas other cultivars are susceptible. In most location-years in New York, Pardee has higher forage yield than Norcen, and higher or equal yield to Viking. In fields with or without noticeable disease, plant stand after 2 yr is higher for Pardee than for either Viking or Norcen. Pardee also has a darker orange-yellow colored flower compared with the yellow flowers of other cultivars.

Prebreeder seed was produced from 107 plants selected for resistance to Fusarium wilt in a greenhouse after being inoculated with F. oxysporum f. sp. loti. Selected plants were cross-pollinated by bumblebees in isolated indoor cages to produce the Syn. 1 generation. Breeder seed (Syn. 2) anticipated to last the life of the cultivar was produced in 1998 at Rosemount, MN, by Dr. Nancy Ehlke (University of Minnesota). This seed is stored under controlled environmental conditions in Ithaca, NY, to preserve seed viability. Foundation seed (Syn. 3) may be produced from Breeder seed in northern USA on stands no more than 3 yr old unless by consent of the breeder. Certified seed (Syn. 3 or 4) may be produced from Breeder or Foundation seed on stands no more than 6 yr old. Seed shall be sold by cultivar name only as a class of certified seed. Pardee was reviewed favorably by the National Alfalfa and Miscellaneous Legumes Variety Review Board in 2003. Plant Variety Protection will not be sought for Pardee.

ACKNOWLEDGMENTS

Development of this cultivar was partially supported by Multistate Research Project NE-144.

NOTES

Registration by CSSA.

C.C. Lowe, deceased.

Accepted for publication January 31, 2004.

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