Cytochimeras are important materials used to study the behaviors of the cells with different ploidies in a tissue. The epidermal cell size and pollen size are commonly used to indirect detective the cell ploidy levels...Cytochimeras are important materials used to study the behaviors of the cells with different ploidies in a tissue. The epidermal cell size and pollen size are commonly used to indirect detective the cell ploidy levels in L1 and L2 layers, because ploidy is one of the parameters that influence cell size; higher ploidy levels usually result in proportionally larger cells. To my knowledge, there is not any published report for direct determining ploidy of the somatic cells in different layers of a cytochimera. During a histological investigation of Pelargonium zonale ‘little lady’, a method was developed, which was able to directly determine ploidy by counting chromosome number of the somatic cells in different layers of cytochimeral tissue in embedding slices stained with Toluidin blue. In the mean time, the processes of nuclear division in cytochimeral tissue were observed with this method. Therefore, it can not only be used to directly determine the ploidy of the somatic cells in different layers in cytochimera, but also be used for study of cell division procedures of mutated cells in cytochimeras.展开更多
一种可以改善快大型肉鸡品系功能性状和生产效率的新方法,是在出雏器（Perinatal Temperature Training,PTT：从第18天到出雏的出生前进行温度训练）提供短期温和的温度训练。在体温调节系统发育的关键阶段实施温度训练会对肉鸡的温度...一种可以改善快大型肉鸡品系功能性状和生产效率的新方法,是在出雏器（Perinatal Temperature Training,PTT：从第18天到出雏的出生前进行温度训练）提供短期温和的温度训练。在体温调节系统发育的关键阶段实施温度训练会对肉鸡的温度适应能力和多项机体功能产生长久的影响,因为体温的中央控制与机体机能,如代谢、采食、体重调节以及免疫和应激反应之间具有较强的相关性。展开更多
基金Supported by Scientific Research from Mianyang Normal University (MA2005008) and from Sichuan Education administration(2006C-048) .
文摘Cytochimeras are important materials used to study the behaviors of the cells with different ploidies in a tissue. The epidermal cell size and pollen size are commonly used to indirect detective the cell ploidy levels in L1 and L2 layers, because ploidy is one of the parameters that influence cell size; higher ploidy levels usually result in proportionally larger cells. To my knowledge, there is not any published report for direct determining ploidy of the somatic cells in different layers of a cytochimera. During a histological investigation of Pelargonium zonale ‘little lady’, a method was developed, which was able to directly determine ploidy by counting chromosome number of the somatic cells in different layers of cytochimeral tissue in embedding slices stained with Toluidin blue. In the mean time, the processes of nuclear division in cytochimeral tissue were observed with this method. Therefore, it can not only be used to directly determine the ploidy of the somatic cells in different layers in cytochimera, but also be used for study of cell division procedures of mutated cells in cytochimeras.
文摘一种可以改善快大型肉鸡品系功能性状和生产效率的新方法,是在出雏器（Perinatal Temperature Training,PTT：从第18天到出雏的出生前进行温度训练）提供短期温和的温度训练。在体温调节系统发育的关键阶段实施温度训练会对肉鸡的温度适应能力和多项机体功能产生长久的影响,因为体温的中央控制与机体机能,如代谢、采食、体重调节以及免疫和应激反应之间具有较强的相关性。
