Submitted to: American Peanut Research and Education Society Abstracts
Publication Type: Abstract only
Publication Acceptance Date: 3/15/2003
Publication Date: 12/15/2003
Citation: Holbrook Jr, C.C., Dong, W.B. 2003. Selection of a core of the core collection for peanut. Proc. Amer. Peanut Res. and Educ. Soc. 35:29. Interpretive Summary: not required
Technical Abstract: A core collection (831 accessions) has been developed to represent the U.S. Arachis hypogaea germplasm collection and can be used to improve the efficiency of identifying genes of interest. An even smaller subset of germplasm would be useful for traits which are very difficult and/or expensive to measure. The objective of this research was to select a core of the core collection. Data for eight above ground and eight below ground morphological characteristics were measured for each accession in the core collection. Cluster analysis was used on this data set to partition the core accessions into groups which, theoretically, are genetically similar. Random sampling was then used to select a ten percent sample was selected from each group. The result was a core of the core collection consisting of 111 accessions. Examination of morphological data indicated that the genetic variation expressed in the core collection has been preserved in this core of the core collection. Data on disease resistances for accessions in the core collection were used to retrospectively determine how effective the use of this core of the core would have been in identifying sources of resistance in the core collection. The results indicated that this core of the core is a representative sample of the core collection, and can be used to improve the efficiency of identifying valuable genes in the core collection.