【摘 要】
：
利用16个SSR标记检测12个浙江红山茶天然群体的遗传结构.结果显示,现有浙江红山茶的遗传多样性呈现较低水平(h=0.607),其分布特点是,中部处于怀玉山系及武夷山系群体(如
【机 构】
：
江西省林业科学院省植物生物技术重点实验室,南昌,330032南京林业大学林木遗传与生物技术省部共建教育部重点实验室,南京,210037
【出 处】
：
中国林学会珍贵树种分会成立大会暨首届中国珍贵树种学术研讨会
论文部分内容阅读
利用16个SSR标记检测12个浙江红山茶天然群体的遗传结构.结果显示,现有浙江红山茶的遗传多样性呈现较低水平(h=0.607),其分布特点是,中部处于怀玉山系及武夷山系群体(如江西大茅山、三清山、浙江古田山群体)多样性水平较高,为浙江红山茶多样性分布中心,向西处于衡山系的群体(湖南衡山)多样性最低,而东部泰顺及沿海的霞浦等群体的多样性相对处于中等水平；浙江红山茶各群体存在明显的遗传结构,且具高水平的遗传分化,群体间变异占总变异约25％ (FST=0.245,GST=0.255),其重要原因在于：群体规模较小,部分群体(湖南衡山、江西婺源灵山群体)已经历瓶颈效应,群体内存在近交,群体间基因流较小(Nm=0.731)等.开展浙江红山茶的资源保护与利用迫在眉睫,对多样性较高的群体如江西大茅山、三清山及浙江古田山等群体重点就地保护,可通过建立保护区等方式杜绝砍伐及破坏现象；而对遗传多样性较低的群体,如衡山、福安群体的物种恢复,建议通过引种回归方法；此外,对于多样性较低的分布区域,如江西中西部至湖南等地区,建议通过引种方式丰富资源.
其他文献
Gluten proteins constitute a major determinant of the processing and nutritional traits of wheat grains.They are composed mainly of three families of seed stora
无芒山羊草,2n=2x=14,基因组TT,高抗小麦白粉病和条锈病,与小麦进行远缘杂交可将相应优异基因导入小麦.对小麦-无芒山羊草中间材料进行精确鉴定是实现针对性利用染色体工
Pollinator specificity and strict-sense coevolution have been considered as the predominate evolutionary process in the fig (Ficus) and fig wasp (Agaonidae) obl
植物根系是吸收水分和营养离子的重要器官,健壮的根系可以极大提高植物对水分的吸收特别是干旱条件下土壤深层水分的吸收,在叶片蒸腾速率不变的情况下,来实现植物抗旱性
To date,most automated high-resolution phenotyping systems have been laboratory-or greenhouse-based.These systems suffer from the limitation that plant performa
The genus Brassica includes several important agricultural and horticultural crops.Their current genome structures were shaped by whole-genome triplication foll
Structure variation of chromosomes,e.g.reversion,translocation,insertion and deletion of segments,among close related species has been demonstrated in vario
Brassica juncea (2n = 36,AABB) is an allotetraploid derived from interspecific hybridization between B.rapa (2n = 20,AA) and B.nigra (2n = 16,BB) and followed b
Our lab is developing genome wide survey tool for molecular breeding of B.oleracea.We also obtained more than 10x genome coverage wgs data from 14 B.oleracea ac
Up to now,only a very few genetic diversity has been used in rapeseed breeding programs and even in more academic genetic studies.However,a wide range of variab