Germplasm sharing among the breeding programs for this purpose, at least within the US, is plausible given the genetic similarity among the lines, as observed in Fig. 2.
The population stratification and germplasm sharing among the lines revealed by the PC was also corroborated by the results from hierarchical clustering using Ward's method in JMP (Additional file 1).
In this study, we exploited available genetic information on the powdery mildew resistance locus Ren1 to identify additional germplasm that shared a Ren1-like local haplotype, and then attempted to clarify the evolution of powdery mildew resistance and its domestication in cultivated V. vinifera subsp. sativa.
Clearly, further work on shared germplasm sets is needed to resolve these issues.
This suggests that germplasm brought to the United States at various times has been considerably mixed between dormant and non-dormant germplasm groups and perhaps shared among different breeding programs.
In addition, validation of tea EST-derived SNPs in a large number of tea germplasm groups will help the identification of fully informative SNPs, but also will highlight the proportion of informative SNPs shared across different germplasm groups.
In addition, we can differentiate those markers whose effects are shared between distinct germplasm pools.
The genotyping results showed that several germplasms had a similar grain size and also shared a particular allele combination of the six key genes examined in this study.
Susanne Thienhaus, FADCANIC RAAS, coordinator of the Innovation Program at the Centro Agroforestal Sostenible, Wawashang, Nicaragua, shared information on the distribution of cacao germplasm.
