tailieunhanh - báo cáo khoa học: " Introgression potential between safflower (Carthamus tinctorius) and wild relatives of the genus Carthamus"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Introgression potential between safflower (Carthamus tinctorius) and wild relatives of the genus Carthamus | Mayerhofer et al. BMC Plant Biology 2011 11 47 http 1471-2229 11 47 BMC Plant Biology RESEARCH ARTICLE Open Access Introgression potential between safflower Carthamus tinctorius and wild relatives of the genus Carthamus 1 1 2 1 1 Marion Mayerhofer Reinhold Mayerhofer Deborah Topinka Jed Christianson Allen G Good Abstract Background Safflower Carthamus tinctorius is a thistle that is grown commercially for the production of oil and birdseed and recently as a host for the production of transgenic pharmaceutical proteins. C. tinctorius can cross with a number of its wild relatives creating the possibility of gene flow from safflower to weedy species. In this study we looked at the introgression potential between different members of the genus Carthamus measured the fitness of the parents versus the F1 hybrids followed the segregation of a specific transgene in the progeny and tried to identify traits important for adaptation to different environments. Results Safflower hybridized and produced viable offspring with members of the section Carthamus and species with chromosome numbers of n 10 and n 22 but not with n 32. The T-DNA construct of a transgenic C. tinctorius line was passed on to the F1 progeny in a Mendelian fashion except in one specific cross where it was deleted at a frequency of approximately 21 . Analyzing fitness and key morphological traits like colored seeds shattering seed heads and the presence of a pappus we found no evidence of hybrid vigour or increased weediness in the F1 hybrids of commercial safflower and its wild relatives. Conclusion Our results suggest that hybridization between commercial safflower and its wild relatives while feasible in most cases we studied does not generate progeny with higher propensity for weediness. Background The genus Carthamus is a diverse group of plants within the Asteraceae and is of interest due to the commercial growth of one member C. tinctorius safflower as well as for its potential .