A high-density linkage map was constructed for an F2 population derived from an Interspecific cross of cultivated allotetraploid species between Gossypium hirsutum L. and G. barbadense L. A total of 186 F2 individuals...A high-density linkage map was constructed for an F2 population derived from an Interspecific cross of cultivated allotetraploid species between Gossypium hirsutum L. and G. barbadense L. A total of 186 F2 individuals from the Interspecific cross of ＂CRI 36 × Hal 7124＂ were genotyped at I 252 polymorphic loci Including a novel marker system, target region amplification polymorphism （TRAP）. The map consists of 1 097 markers, including 697 simple se- quence repeats （SSRs）, 171 TRAPs, 129 sequence-related amplified polymorphisms, 98 amplified fragment length polymorphisms, and two morphological markers, and spanned 4 536.7 cM with an average genetic distance of 4.1 cM per marker. Using 45 duplicated SSR loci among chromosomes, 11 of the 13 pairs of homologous chromosomes were Identified In tetraploid cotton. This map will provide an essential resource for high resolution mapping of quantitative trait loci and molecular breeding in cotton.展开更多
基于语义地图的自主导航移动机器人在空间勘探、危险物品搜索、自动驾驶等领域有着广阔的应用前景。为使移动机器人更好地完成相关复杂任务,针对传统SLAM(simultaneous localization and mapping)地图不够精细、语义信息缺失的问题,提...基于语义地图的自主导航移动机器人在空间勘探、危险物品搜索、自动驾驶等领域有着广阔的应用前景。为使移动机器人更好地完成相关复杂任务,针对传统SLAM(simultaneous localization and mapping)地图不够精细、语义信息缺失的问题,提出一种多传感器融合的语义地图构建技术。综合激光SLAM精度高和视觉信息纹理丰富的特点,选取基于ROS(robot operating system)系统的移动机器人平台,研究基于里程计、惯性传感单元(IMU)和激光雷达多源传感器融合进行即时定位与创建地图,将基于深度学习的目标检测算法移植到ROS系统中,结合机器人深度摄像头获取的图像信息实现目标语义识别,并结合深度信息进行位置解算实现目标定位和地图语义标注。通过机器人多目标语义添加实验和移动过程中的增量式地图构建与实时同步添加语义信息实验,验证该系统能实时地创建语义地图。展开更多
文摘A high-density linkage map was constructed for an F2 population derived from an Interspecific cross of cultivated allotetraploid species between Gossypium hirsutum L. and G. barbadense L. A total of 186 F2 individuals from the Interspecific cross of ＂CRI 36 × Hal 7124＂ were genotyped at I 252 polymorphic loci Including a novel marker system, target region amplification polymorphism （TRAP）. The map consists of 1 097 markers, including 697 simple se- quence repeats （SSRs）, 171 TRAPs, 129 sequence-related amplified polymorphisms, 98 amplified fragment length polymorphisms, and two morphological markers, and spanned 4 536.7 cM with an average genetic distance of 4.1 cM per marker. Using 45 duplicated SSR loci among chromosomes, 11 of the 13 pairs of homologous chromosomes were Identified In tetraploid cotton. This map will provide an essential resource for high resolution mapping of quantitative trait loci and molecular breeding in cotton.
