This study aims to investigate the variation in occurrence of white-belly rice kernel（WBRK） and white-core rice kernel（WCRK） among different positions within a panicle. Twenty-four M4 mutants involved in four pani...This study aims to investigate the variation in occurrence of white-belly rice kernel（WBRK） and white-core rice kernel（WCRK） among different positions within a panicle. Twenty-four M4 mutants involved in four panicle types, namely the compact, intermediate, loose, and chicken foot panicle were used. They derived from a japonica rice cultivar Wuyujing 3. Considerable differences in morphological characters existed among the four types of panicle, especially in panicle length, the secondary branch number and ratio of grain number to total branch length. Marked differences were found in WBRK and WCRK among different positions within a panicle for all types of panicle. In general, grains located on the primary rachis and top rachis branches had higher WBRK and WCRK percentage than those on the secondary rachis and bottom rachis branches. WCRK exhibited larger variation among grain positions than WBRK did. Moreover, there was a significant difference in WCRK/WBRK among grain positions within a panicle, with primary rachis and top rachis branches having higher values than the secondary and bottom rachis. In addition, panicle type showed no significant effect on the pattern of WBRK and WCRK occurrence within a panicle. The results indicated the difference in mechanism of WBRK and WCRK formation in grain position within a panicle, and are valuable for breeding and agronomic practices aimed at lowering chalky grain rate.展开更多
针对传统有线通信布线铺设难、成本高、设备移动不便以及无线射频通信频谱资源紧张、存在电磁辐射等问题,提出了一种基于可编程片上系统技术(System on a Programmable Chip,SOPC),利用可见光作为传输介质进行无线光通信传输数据的应用...针对传统有线通信布线铺设难、成本高、设备移动不便以及无线射频通信频谱资源紧张、存在电磁辐射等问题,提出了一种基于可编程片上系统技术(System on a Programmable Chip,SOPC),利用可见光作为传输介质进行无线光通信传输数据的应用方案。介绍了该方案的设计原理和实现方法,并进行实验测试,试验结果表明,该方案可行,且能够达到光能量与通信复用的目的。展开更多
基金supported by the Program for New Century Excellent Talents in University, China (NCET-10-0472)the National Natural Science Foundation of China (30971733 and 31171485)
文摘This study aims to investigate the variation in occurrence of white-belly rice kernel（WBRK） and white-core rice kernel（WCRK） among different positions within a panicle. Twenty-four M4 mutants involved in four panicle types, namely the compact, intermediate, loose, and chicken foot panicle were used. They derived from a japonica rice cultivar Wuyujing 3. Considerable differences in morphological characters existed among the four types of panicle, especially in panicle length, the secondary branch number and ratio of grain number to total branch length. Marked differences were found in WBRK and WCRK among different positions within a panicle for all types of panicle. In general, grains located on the primary rachis and top rachis branches had higher WBRK and WCRK percentage than those on the secondary rachis and bottom rachis branches. WCRK exhibited larger variation among grain positions than WBRK did. Moreover, there was a significant difference in WCRK/WBRK among grain positions within a panicle, with primary rachis and top rachis branches having higher values than the secondary and bottom rachis. In addition, panicle type showed no significant effect on the pattern of WBRK and WCRK occurrence within a panicle. The results indicated the difference in mechanism of WBRK and WCRK formation in grain position within a panicle, and are valuable for breeding and agronomic practices aimed at lowering chalky grain rate.
文摘针对传统有线通信布线铺设难、成本高、设备移动不便以及无线射频通信频谱资源紧张、存在电磁辐射等问题,提出了一种基于可编程片上系统技术(System on a Programmable Chip,SOPC),利用可见光作为传输介质进行无线光通信传输数据的应用方案。介绍了该方案的设计原理和实现方法,并进行实验测试,试验结果表明,该方案可行,且能够达到光能量与通信复用的目的。
