HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Google Scholar Articles by Mian, M. A. R. Articles by Dorrance, A. E. PubMed Articles by Mian, M. A. R. Articles by Dorrance, A. E.

GERMPLASM

Registration of Strong-Rps1k Soybean Germplasm Line

^a USDA-ARS, Corn and Soybean Research Unit, and Dep. of Horticulture and Crop Science, 1680 Madison Ave., The Ohio State Univ., Wooster, OH 44691
^b Dep. of Plant Pathology, The Ohio State Univ., Wooster, OH 44691

^* Corresponding author (mian.3{at}osu.edu).

ABSTRACT

Strong-Rps1k (Reg. No. GP-359, PI 644025) soybean [Glycine max (L.) Merr.] germplasm line was developed jointly by the USDA-ARS and The Ohio Agricultural Research and Development Center (OARDC) at Wooster, OH. It was released because it carried the Rps1k gene for race specific resistance to Phytophthora root and stem rot (caused by Phytophthora sojae Kaufmann & Gerdemann) in the semidwarf background of cultivar Strong. Strong, which has the Rps1a gene, is well known for its adaptation to high yield environments where excessive vegetative growth and early lodging limit the yield potential of taller indeterminate soybean cultivars. Strong-Rps1k was developed by backcrossing the Rps1k gene from cultivar Sprite 87 into Strong. Seeds from the BC₅F_2:3 plants homozygous for the Rps1k gene were bulked to make Strong-Rps1k. It was evaluated for agronomic performance in local and regional tests. Performance of Strong-Rps1k was comparable to that of Strong. The Rps1k gene provides resistance against a wider range the P. sojae populations that are present in the North-Central U.S. soybean-growing region than does the Rps1a gene. Thus, Strong-Rps1k may be useful for breeders and researchers interested in developing new germplasm with resistance to Phytophthora root and stem rot with specific adaptation to high-yielding environments.