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a USDA-ARS, 605 Airways Blvd., Jackson, TN 38301
b Dep. of Plant Sciences, Univ. of Tennessee, Knoxville, TN 37901-1071. Research supported in part by the Tennessee Soybean Promotion Board
* Corresponding author (parelli{at}ars.usda.gov).
JTN-5303 soybean [Glycine max (L.) Merr.] (Reg. No. GP-328, PI 641937) was developed by the USDA-ARS in cooperation with the Tennessee Agricultural Experiment Station and was released in June 2005. It was released because of its high seed yield and resistance to diseases, including soybean cyst nematode (SCN) (Heterodera glycines Ichinohe). It is a maturity group V line (relative maturity 5.4) and is well adapted to production in the southern USA.
JTN-5303 is an F6–derived line from the cross ‘Caviness’ x ‘Anand’ (Anand et al., 2001). The pedigrees of the parental cultivars, Caviness and Anand, include ‘Hutcheson’ x ‘Asgrow 5403’ and ‘Holladay’ x ‘Hartwig’, respectively (Burton et al.,1996; Buss et al., 1988; Anand, 1992; P. Chen, personal communication, 2006). Caviness is reportedly resistant to SCN races 3 and 14, and Anand is resistant to SCN races 2, 3, 5, and 14. Caviness derived its resistance from PI 88788 via Asgrow 5403. Anand derived its resistance from Peking and PI 437654 via Hartwig.
The F1 plants were advanced to the F5 generation via single-pod descent in Costa Rica during 1997–1998 (Fehr, 1991). F6 pods were harvested in Costa Rica, and approximately 25, F6:7 plant rows were grown in Jackson, TN, during 2002. In 2002 single plants were selected from the best F6:7 plant rows, and seed was bulked based on agronomic traits, superior yield and SCN resistance to form 12 new F7 lines. Each F7 line traces to multiple F7 single plants. The seed was increased in an off-season nursery in Costa Rica. Selection for SCN resistance involved both molecular markers and greenhouse phenotyping with nematode populations (Arelli et al., 2000). In a marker-assisted selection, SCN alleles rhg1, Rhg4, and Rhg5 were tracked using simple sequence repeat markers Satt 309, Satt 632, and Satt 082 during 2002 and 2003 (Mudge et al., 1997). A selected line was designated as experimental line JTN-5303 and was evaluated in yield tests at multiple locations each year in Tennessee from 2003 to 2004.
In local preliminary breeder yield trials in Tennessee, averaged over six environments from 2004, JTN-5303 exceeded Anand in seed yield. Seed yield of JTN-5303 was 3900 kg ha–1, and Anand was 3500 kg ha–1. JTN-5303 was entered in the Tennessee State Variety Test in 2004, where its average seed yield (3900 kg ha–1) in six environments was identical to that of check variety ‘5002T’ but less than ‘5601T’ (4300 kg ha–1) (Allen et al., 2004; Pantalone et al., 2003, 2004).
Based on data averaged from 23 locations in 2004 USDA Southern Regional Uniform Group V tests, JTN-5303 produced 3735 kg ha–1 seed yield, 200 g kg–1 seed oil, 400 g kg–1 seed protein (zero moisture basis), and 15-g seed weight (100 seeds). Both checks, 5601T and 5002T produced similar yields, seed oil, seed protein, and seed weight (Paris and Bell, 2004, 2005). JTN-5303 matured 2 d later than 5002T and was 5.1 cm taller. Lodging resistance in JTN-5303 was similar to 5002T. JTN-5303 has white flowers, tawny pubescence, and a determinate growth habit. Seeds are yellow with black hila.
JTN-5303 is resistant to multiple populations of SCN races (2, 3, 5, 14, corresponding to HG types 1.2.5.7; 0; 2.5.7; 1.3.6.7, respectively, based on greenhouse tests in Jackson, TN [Niblack et al., 2002]). The resistance was confirmed in tests conducted at the University of Missouri-Columbia (John Wilcox, personal communication, 2004). In tests conducted at the University of Tennessee, JTN-5303 was resistant to sudden death syndrome [caused by Fusarium solani (Mart.) Sacc.], resistant to stem canker [caused by Diaporthe phaseolorum (Cooke & Ellis) Sacc. var. caulivora K. L. Athow & R. M. Caldwell], and resistant to frogeye leaf spot (caused by Cercospora sojina K. Hara) (Newman, 2004). In tests conducted at Stoneville, MS (2003–2004), JTN-5303 was moderately resistant to charcoal rot [caused by Macrophomina phaseolina (Tassi) Goidanich]. In tests conducted at the University of Georgia (2004), JTN-5303 was susceptible to both root-knot nematodes caused by Meloidogyne incognita and Meloidogyne arenaria (B. Paris, personal communication).
Seed of JTN-5303 will be maintained by the Crop Genetics & Production Research Unit, USDA-ARS, Jackson, TN, 38301. Small samples (200 seeds) of JTN-5303 can be requested from the corresponding author for at least 5 yr. It is requested that appropriate recognition be made if this germplasm line contributes to the development of new germplasm and cultivars. No application will be made for U.S. plant variety protection for JTN-5303.
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 December 19, 2005.
References
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