| natural variation in gene expression between wild and weedy populations of helianthus annuus. | the molecular genetic changes underlying the transformation of wild plants into agricultural weeds are poorly understood. here we use a sunflower cdna microarray to detect variation in gene expression between two wild (non-weedy) helianthus annuus populations from utah and kansas and four weedy h. annuus populations collected from agricultural fields in utah, kansas, indiana, and california. when grown in a common growth chamber environment, populations differed substantially in their gene expre ... | 2008 | 18689879 |