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CULTIVARS

Registration of ‘ReGen’ Alfalfa

Dep. of Plant Breeding and Genetics, Cornell Univ., Ithaca, NY 14853

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

‘ReGen’ alfalfa (Medicago sativa L.) (Reg. No. CV-204, PI 643396) 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 2005. Experimental designation was NY 0131.

ReGen is the result of a three-way population cross. The initial cross was between two plant populations: ‘Seedway 9558’ and a population composed of germplasm related to ‘Iroquois’, ‘Saranac AR’, ‘Oneida VR’, and ‘Vertus’, followed by phenotypic recurrent selection for multiple disease resistance and selection in the field for plant vigor, freedom of diseases, resistance to lodging, and lower forage neutral detergent fiber and acid detergent fiber concentrations. This population cross was done by hand reciprocally to produce full-sib families between 100 clones per population. Progenies of this population cross were crossed with a population derived from ‘Magnum III’ after selection for resistance to anthracnose (Race 1) (caused by Colletotrichum trifolii Bain & Essary) (two cycles), Verticillium wilt (caused by Verticillium albo-atrum Reinke & Berthier) (two cycles), and Phytophthora root rot (caused by Phytophthora megasperma Drechs. f. sp. medicaginis T. Kuan & D.C. Erwin) (one cycle). Full-sib crosses between the populations were made by hand (74 clones per population). Seed of the Syn. 1 generation was a bulk of equal weight of seed per cross. The Syn. 2 generation (Breeder seed) was produced in 2001.

ReGen is a dormant cultivar with fall dormancy similar to the FD3 check. It has high resistance to Fusarium wilt [caused by Fusarium oxysporum Schlecht. f. sp. medicaginis (Weimer) Snyd. & Hans.], Verticillium wilt, and anthracnose (Race 1); resistance to bacterial wilt [caused by Clavibacter michiganensis subsp. insidiosum (McCull.) Davis et al.] and Phytophthora root rot; and low resistance to Aphanomyces root rot (Race 1) (caused by Aphanomyces euteiches Drechs). In New York, ReGen averaged 1.08 Mg ha^–1 (9%) per year more dry forage than Oneida VR, 1.95 Mg ha^–1 (19%) more than ‘Vernal’, and 0.85 Mg ha^–1 (7%) more than ‘5312’ in three production years (Hansen et al., 2005). Concentrations of neutral detergent fiber and acid detergent fiber are similar to those of Vernal. Flower color of the Syn. 2 generation is 93% purple and 7% variegated.

In 2001 Breeder seed (Syn. 2) was produced under cage isolation in Caldwell, ID, in sufficient quantity to last the lifetime of the cultivar. The Department of Plant Breeding and Genetics at Cornell University maintains this seed under controlled environmental conditions. Foundation seed (Syn. 3) may be produced from Breeder seed in northern USA on stands no more than three years 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 six years old. Seed shall be sold by cultivar name only as a class of Certified seed. The National Alfalfa and Miscellaneous Legumes Variety Review Board reviewed ReGen favorably in 2006.

Acknowledgments

Development of this cultivar was partially supported by Hatch 149416 and Multistate Research Project NE-1010.

Footnotes

All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permission for printing and for reprinting the material contained herein has been obtained by the publisher.

Received for publication September 16, 2006.

References

• Hansen, J.L., D.R. Viands, R. Deubler, J. Neally, E. Thomas, J. Yaeger, and M. Davis. 2005. New York forage legume and grass yield trails summary for 2005. Available at http://plbrgen.cals.cornell.edu/programsandprojects/departmental/foragetest/ (verified 16 July 2007). College of Agriculture and Life Sciences, Cornell Univ., Ithaca, NY.

This Article Full Text (PDF) Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Viands, D. R. Articles by Neally, J. L. Search for Related Content PubMed Articles by Viands, D. R. Articles by Neally, J. L. Agricola Articles by Viands, D. R. Articles by Neally, J. L.