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Dep. of Agronomy and Soils and Alabama Agric. Expt. Stn., Auburn Univ., Auburn, AL 36849-5412
* Corresponding author (mosjija{at}auburn.edu).
‘AU Olympic’ common vetch (Vicia sativa L.) (Reg. No. CV-10, PI 643132) was developed and released in 2003 by Auburn University and the Alabama Agricultural Experiment Station. It was released because it has a consistently high forage yield and nematode resistance.
This cultivar was selected from a F7 bulk population derived from crosses between Cahaba White and plant introductions 286470, 289500, 289491, 277369, and 202524 done at the USDA-ARS Regional Plant Introduction Station, Experiment, GA. The F2 seed was bulked and F3 and F4 were grown in Georgia where the F4 was subjected to low temperatures (below –17°C) in the field. Surviving plants were harvested and F5 seeds were planted at Tallassee, AL, where additional selection for uniform plant type, lack of pod shattering and visual yield potential was performed in 1986 and 1987. Seed of F7 plants was increased in subsequent years. Initial field testing in 1990–91, suggested superior forage yield performance of AU Olympic when compared to standard cultivars. A subsequent greenhouse experiment indicated that AU Olympic was resistant to root-knot nematode (Meloidogyne arenaria) and soybean cyst nematode (Heterodera glycines) (Mosjidis et al., 1993). Testing at Brewton, Tallassee, and Winfield, AL, in the seasons 1998–99 and 2001–02, showed that forage dry matter yield of AU Olympic was consistently higher than Cahaba White. In 1999, AU Olympic had an average forage dry matter yield 21% higher than Cahaba, and in 2002, was 12.8% higher.
AU Olympic seedlings have green epicotyls and the plants are semi-prostrated with single white flowers. It flowers on the average about the same time as Cahaba White. Seeds of AU Olympic have 30 to 53% orange cotyledons whereas Cahaba White seeds have 90 to 99% orange cotyledons. Seeds of AU Olympic tend to be smaller than those of Cahaba White. The 1000 seed weight of AU Olympic ranged between 45.5 and 75.8 g whereas Cahaba White seed weight ranged between 52.1 and 82.5 g depending on the sample and location. AU Olympic can be grown as a cover crop and used as a green manure in a conventional tillage system or residues may be left on the ground in conservation tillage systems. Also, it can be grown for forage production together with a grain crop or used as a pasture. This new cultivar can be grown throughout Alabama and probably other southern states. It should be adapted to all regions where common vetch is grown.
Foundation and Certified seed classes will be recognized. Breeder seeds of AU Olympic will be produced and maintained by Auburn University, Alabama Agricultural Experiment Station. U.S. plant variety protection will not be applied for.
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 June 28, 2006.
References
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