In order to provide theoretical basis and technical support for the afforestation and artificial water supply of P.szechuanica in arid areas,the characteristics of water consumption of P.szechuanica were explored,and ...In order to provide theoretical basis and technical support for the afforestation and artificial water supply of P.szechuanica in arid areas,the characteristics of water consumption of P.szechuanica were explored,and the law of water demand of P.szechuanica was grasped.In this paper,potted seedlings of 1-0 rooted cuttings of P.szechuanica were taken as research objects,and change situation of water consumption under different water control gradients was measured regularly by using weighing method,further analyzing dynamic change of water consumption of P.szechuanica and revealing water demand law of 1-0 rooted cuttings of P.szechuanica.The results showed that total change of water consumption of 1-0 rooted cuttings of P.szechuanica had"slow-fast-slow-fast"double-peak trend in the growth period of the current year,and corresponded with univariate linear relation(R^(2)=0.7137),with significant difference.In whole growth period,water consumption in August was the highest,which was 2.7 times of that in June and July and 1.5 times of that after September.In different water control treatments,the dynamic changes of daily and monthly water consumption were significantly different.In seven water control treatments,monthly water consumption was between(6315.95±1690.70)and(10105.28±3065.30)g/month,and mean was(8211.07±2308.23)g/month.With intensification of water control treatment,water consumption increased,but there was no seedling death due to water shortage.P.szechuanica has great plasticity in water demand,and can survive in both arid and humid environments.Meanwhile,it is revealed that P.szechuanica is the most widely distributed tree species in the region.展开更多
以欧美杨I-108和藏川杨为亲本杂交得到427个子代为试材,对其进行苗期性状遗传图谱分析,并构建了1张总长度969.1 c M,标记间平均距离25.14 c M的杂交杨树遗传图谱。结果表明:该图谱包含6个连锁群,连锁群上标记数量37个,用Genemap软件绘...以欧美杨I-108和藏川杨为亲本杂交得到427个子代为试材,对其进行苗期性状遗传图谱分析,并构建了1张总长度969.1 c M,标记间平均距离25.14 c M的杂交杨树遗传图谱。结果表明:该图谱包含6个连锁群,连锁群上标记数量37个,用Genemap软件绘制标记连锁图谱;检测到株高(h_s)、单叶光合速率(P_n)、胞间CO_2浓度(C_i)、蒸腾速率(T_r)4个表型指标符合正态分布。利用MAPMAKER软件的区间作图法进行QTL定位和效应估计,共检测到8个与苗期生长和光合性状相关的QTL,包括3个与h_s相关的QTL,贡献率分别为16.4%、20.1%和17.8%;2个与P_n相关的QTL,贡献率分别为10.2%和13.7%;2个与C_i相关的QTL,贡献率分别为6.7%和8.3%;1个与T_r相关的QTL,贡献率9.7%。展开更多
基金Supported by Natural Science Foundation of Tibet Autonomous Region(XZ2019ZRG-58)Forestry Discipline Innovation Team Construction Project of Tibet Agriculture&Animal Husbandry University(Tibet Financial Forecast:2020-001).
文摘In order to provide theoretical basis and technical support for the afforestation and artificial water supply of P.szechuanica in arid areas,the characteristics of water consumption of P.szechuanica were explored,and the law of water demand of P.szechuanica was grasped.In this paper,potted seedlings of 1-0 rooted cuttings of P.szechuanica were taken as research objects,and change situation of water consumption under different water control gradients was measured regularly by using weighing method,further analyzing dynamic change of water consumption of P.szechuanica and revealing water demand law of 1-0 rooted cuttings of P.szechuanica.The results showed that total change of water consumption of 1-0 rooted cuttings of P.szechuanica had"slow-fast-slow-fast"double-peak trend in the growth period of the current year,and corresponded with univariate linear relation(R^(2)=0.7137),with significant difference.In whole growth period,water consumption in August was the highest,which was 2.7 times of that in June and July and 1.5 times of that after September.In different water control treatments,the dynamic changes of daily and monthly water consumption were significantly different.In seven water control treatments,monthly water consumption was between(6315.95±1690.70)and(10105.28±3065.30)g/month,and mean was(8211.07±2308.23)g/month.With intensification of water control treatment,water consumption increased,but there was no seedling death due to water shortage.P.szechuanica has great plasticity in water demand,and can survive in both arid and humid environments.Meanwhile,it is revealed that P.szechuanica is the most widely distributed tree species in the region.
文摘以欧美杨I-108和藏川杨为亲本杂交得到427个子代为试材,对其进行苗期性状遗传图谱分析,并构建了1张总长度969.1 c M,标记间平均距离25.14 c M的杂交杨树遗传图谱。结果表明:该图谱包含6个连锁群,连锁群上标记数量37个,用Genemap软件绘制标记连锁图谱;检测到株高(h_s)、单叶光合速率(P_n)、胞间CO_2浓度(C_i)、蒸腾速率(T_r)4个表型指标符合正态分布。利用MAPMAKER软件的区间作图法进行QTL定位和效应估计,共检测到8个与苗期生长和光合性状相关的QTL,包括3个与h_s相关的QTL,贡献率分别为16.4%、20.1%和17.8%;2个与P_n相关的QTL,贡献率分别为10.2%和13.7%;2个与C_i相关的QTL,贡献率分别为6.7%和8.3%;1个与T_r相关的QTL,贡献率9.7%。
