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ARS Home » Research » Publications at this Location » Publication #95321


item Cregan, Perry

Submitted to: Biochemistry and Molecular Biology Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 8/31/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: In the US, commercial soybean varieties are now being developed and marketed by a wide range of private companies and pubic institutions. This has greatly accelerated the number of new applications for Plant Variety Protection. The conventional system of distinguishing new cultivars from those already protected or characterized in the database is based upon morphological, pigmentation, disease resistance, isozyme, etc. traits. Using this system the ability to find one or more unambiguous unique identifying characteristics for a new cultivar becomes more and more difficult. As in human forensics, it would seem appropriate to use a standard set of DNA markers to complement the conventional descriptors. We have developed well over 600 simple sequence repeat (SSR) DNA markers in soybean. These have been used in the creation of a genetic map of the soybean genome that has 20 linkage groups that are assumed to correspond to the 20 sets of soybean chromosomes. We have defined a group of 60 SSR loci that were selected based upon 1) position throughout the 20 soybean linkage groups, 2) a high level of informativeness among the 34 most important ancestors of North American soybeans, and 3) ease of use. This standard set of 60 soybean SSR markers or a subset thereof can be readily used in the identification of new cultivars.