tetrad
英
美
网络 四分体; 四联球菌; 四联体; 四分子; 四分孢子
复数：tetrads
英英释义
noun
- the cardinal number that is the sum of three and one
双语例句
- This phenomenon occurs in the early tetrad stage.
这个现象在早期四分体阶段出现。 - Abnormal tetrad rates in different generations were 0.16, 0.13 and 0.36 respectively.
异常四分体频率各代分别为0.16、0.13和0.66。 - Our main results were as follows: the ovary of male I degenerated and disappeared quickly upon megaspore tetrad degeneration, and developed into macrosporocytes;
结果发现：色木槭一期雄花（雄I）在大孢子四分体退化形成功能性大孢子时期，子房萎缩并迅速退化消失； - The Huangshan A-type granites with tetrad REE: constraints on Mesozoic lithospheric thinning of the southeastern Yangtze craton?
高度演化的黄山A型花岗岩：对扬子克拉通东南部中生代岩石圈减薄的约束？ - It appears however that the formation of megaspore tetrad associated with the high GA3/ ZT ratio.
高水平的ZT/IAA有利于大孢子母细胞和花粉粒的形成，而大孢子四分体的形成则需要高的GA3/ZT比值。 - The abnormality of tetrad callose wall degradation and tapetum development was associated with the abortion of microspore.
导致小孢子败育的原因与四分体胼胝质壁不适时解体和绒毡层细胞发育异常、延迟解体有关。 - Microspore mother cells meiosis was conformed to simultaneous type with mostly tetrahedral and decussate tetrad.
小孢子母细胞减数分裂属于同时型，小孢子在四分体中的排列方式多数为四面体形，少数为十字交叉形。 - Tapetum cell hyperplasia from the tetrad to the single nucleus early period.
绒毡层细胞在四分体&单核早期发生增生； - There is only one layer of parietal cells at the stage of sporogenous cell, megaspore mother cell and tetrad.
造孢细胞，大孢子母细胞和四分体时期，周缘细胞仅1层。 - Otherwise, the chromosome morphology involving Haynaldia chromatin was observed at preleptotene I, and the frequencies of chromatin nucleus at tetrad stage and at microspore stage were investigated.
此外，观察了前期I的簇毛麦染色体形态，统计了四分体和小孢子中小麦和簇毛麦染色质微核频率。