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Registration of Soybean Germplasm Line LL89‐605, Resistant to Brown Stem Rot and Bacterial Blight
Author(s) -
Nickell C. D.,
Lim S. M.,
Eathington S.,
Warsaw R.
Publication year - 1994
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1994.0011183x003400040072x
Subject(s) - germplasm , biology , blight , library science , citation , horticulture , computer science
LL89-605 soybean [Glycine max (L.) Merr.] (Reg. no. GP162, P1 574533) was developed cooperatively by the Illinois Agricultural Experiment Station and the USDA-ARS and released in 1993. It was released because of resistance to bacterial blight (Illinois isolate) caused by Pseudomonas syringae pv. glydnea (Coerper) Young, Dye & Wilke) and resistance to brown stem rot (caused by Phialophora gregata (Allington & D.W. Chamberlain) W. Gams) derived from P1 437821. LL89-605 originated as an F6 plant selection from the cross 'Wells II' x P1437821 made at the Illinois Agricultural Experiment Station (5). The F2, Fa, ?4, and F5 were advanced by selecting the best appearing plants in a modified pedigree method. In 1989, LL89-605 was identified and was evaluated in Illinois for bacterial blight resistance (Illinois isolate) in the greenhouse. LL89-605 was evaluated for agronomic performance in Illinois during 1989 to 1991 and in the Uniform Soybean Tests Northern States Preliminary Test IIA in 1991. LL89-605 is classified as Group II maturity (relative maturity 2.2) averaging 2 d earlier than 'Kenwood' and 6 d earlier than 'Burlison' (1, 2). It is best adapted to 40 to 43° N lat. When compared with Kenwood, LL89-605 had 10% lower yield, lower lodging score (1.4 vs. 1.8 units), shorter plants (73 vs. 90 cm) and higher seed protein (387 g kg' vs. 372 g kg"). In the greenhouse, LL89-605 was equal to P1 437821 and was better than Wells n in leaf symptom ratings for reaction to bacterial blight (Illinois isolate) (1.5 vs. 1.5 vs. 4.5 units). When LL89-605 was compared with 'BSR 201' (4), it was equal in resistance to brown stem rot (Oh2 isolate) hi the greenhouse using the root-dip method (3) and better in field evaluations (stem symptoms rating 7.1 vs. 60.7%, based on percent of stem length browned). LL89-605 has purple flowers, gray pubescence, brown pods at maturity and shiny seeds with imperfect black hila. It is resistant to phytophthora rot (Race 1) [caused by Phytophthora sojae J.J. Kaufmann & J.W. Gerdmann]. Registration of Soybean Germplasm Line LN89-5612, Moderately Resistant to Soybean Cyst Nematode