Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Polymorphisms in monolignol biosynthetic genes are associated with biomass yield and agronomic traits in European maize (Zea mays L.) | Chen et al. BMC Plant Biology 2010 10 12 http 1471-2229 10 12 BMC Plant Biology RESEARCH ARTICLE Open Access Polymorphisms in monolignol biosynthetic genes are associated with biomass yield and agronomic traits in European maize Zea mays L. U r- p. p. U 1 21 I 7 I U .3t Ct Y h I z v Dr Y Y r 1 I D I t r . A Ư . M- r- Ư .4 ft A p. I r I I I 1s5 Yongsheng Chen Imad zein Everton Alen Brenner Jeppe Reitan Andersen MdtnidS Landbeck Milena Ouzunova5 Thomas Lubberstedt1 Abstract Background Reduced lignin content leads to higher cell wall digestibility and therefore better forage quality and increased conversion of lignocellulosic biomass into ethanol. However reduced lignin content might lead to weaker stalks lodging and reduced biomass yield. Genes encoding enzymes involved in cell wall lignification have been shown to influence both cell wall digestibility and yield traits. Results In this study associations between monolignol biosynthetic genes and plant height PHT days to silking DTS dry matter content DMC and dry matter yield DMY were identified by using a panel of 39 European elite maize lines. In total 10 associations were detected between polymorphisms or tight linkage disequilibrium LD groups within the COMT CCoAOMT2 4CL1 4CL2 F5H and PAL genomic fragments respectively and the above mentioned traits. The phenotypic variation explained by these polymorphisms or tight LD groups ranged from 6 to in our line collection. Only 4CL1 and F5H were found to have polymorphisms associated with both yield and forage quality related characters. However no pleiotropic polymorphisms affecting both digestibility of neutral detergent fiber DNDF and PHT or DMY were discovered even under less stringent statistical conditions. Conclusion Due to absence of pleiotropic polymorphisms affecting both forage yield and quality traits identification of optimal monolignol biosynthetic gene haplotype s combining beneficial quantitative trait polymorphism QTP alleles
