【摘要】 巴西橡胶树(Hevea brasiliensis)为大戟科多年生木本植物,也是迄今为止全世界商品天然橡胶(NR)的主要来源。NR是一种具有高弹性、高可塑性及高回弹力的胶乳聚合物,自1876年以来,NR在世界经济发展中一直都起着至关重要的作用。本文报道巴西橡胶树的基因组序列框架图。已组装的基因组序列大约1.1Gb,约占整个单倍体基因组估计长度(2.15Gb)的51%。该基因组中大约有78%为重复DNA。通过基因预测共鉴定出68955个基因模型,其中12.7%为橡胶树所特有。此外,大多数与橡胶生物合成、橡胶木材形成、病害抗性以及致敏性有关的关键基因也被成功鉴定。从该基因组获得的序列信息将有助于人们进一步培育高产无性系,以充分满足全世界对天然橡胶不断增长的需求。更多还原

【Abstract】 Hevea brasiliensis,a member of the Euphorbiaceae family,is the major commercial source of natural rubber(NR).NR is a latex polymer with high elasticity,flexibility,and resilience that has played a critical role in the world economy since 1876.Here,we report the draft genome sequence of H.brasiliensis.The assembly spans~1.1Gb of the estimated 2.15 Gb haploid genome.Overall,78% of the genome was identified as repetitive DNA.Gene prediction shows 68,955 gene models,of which12.7% are unique to Hevea.Most of the key genes associated with rubber biosynthesis,rubberwood formation,disease resistance,and allergenicity have been identified.The knowledge gained from this genome sequence will aid in the future development of high-yielding clones to keep up with the ever increasing need for natural rubber.更多还原