双线期

前期可被分为连续的阶段：细线期、偶线期、粗线期、双线期和终变期。

Prophase may be divided into successive stages termed leptotene , zygotene , pachytene , diplotene , and diakinesis .

用电子显微镜技术观察鲻鱼早期卵子发生进入第一次成熟分裂前期联会丝复合体期、粗线期、双线期和网状期卵原细胞和初级卵母细胞生发泡和胞质的超微结构特点。

Ultrastructural characteristics of oogonia and primary oocyte in the synaptonemal complexes , pachytene , diplotene and dictyate stages of the first meiotic prophase of striped mullet in the early oogenesis were observed hr using transmission electron microscopy .

同时，本文的结果还指出，SC在早双线期到中双线期就解体了，而中期Ⅰ染色体轴是在晚双线期才开始形成。

Furthermore , the results presented in this paper demonstrate that the SC becomes disassembled from early-diplotene to mid-diplotene , while the formation of the metaphase I chromatid core starts at late-diplotene .

哺乳动物卵母细胞阻滞在第一次减数分裂前期的双线期。

In mammals , oocytes are arrested at the diplotene stage of the first meiotic prophase .

哺乳动物卵巢中的卵母细胞的发育停滞在第一次减数分裂前期的双线期。

Fully-grown mammalian oocytes are arrested at the prophase of the first meiotic division within the ovarian follicles .

我们的结果表明，中期Ⅰ染色体轴是在晚双线期到终变期的过程中逐渐在染色体中形成的。

Our results indicate that the metaphase I chromatid core is gradually formed during the period from late-diplotene to diakinesis .

合适的处理时期为前期I的双线期至终变期，巨大花粉比例可达40.6%；

The best doubling effect could be obtained during the period from the diplotene stage to the diakinesis stage , and the highest proportion was up to 40.6 % ;

在小孢子母细胞减数分裂过程中，有核糖体数量存在逐渐减少的现象，质体和线粒体结构在双线期/终变期和中期趋于简化；

A dedifferentiation of mitochondria and plastids in structure in microspore mother cells was observed at from diplonema / diakinesis to metaphase ⅰ, then a redifferentiation at dyad stage .

担子减数分裂的持续时间为18小时，其中细线期和偶线期5.9小时、粗线期6.2小时、双线期和终变期3.4小时、中期10.5小时、后期Ⅰ到四分体2小时；

It took 18 hours for basidia from karyogamy to completion of meiosis , including leptotene and zygotene 5.9 hrs , pachytene 6-2 hrs , diplotene and diakinesis 3.4 hrs , metaphase I 0.5 hrs and anaphase I - tetrad 2 hrs .

造孢细胞在7月下旬形成，8月上旬形成小孢子母细胞，8月下旬开始减数分裂，于10月上旬进入双线期，并以双线期渡过休眠。

The sporogenous cell occurs in late July and develops into the microspore mother cell in early August . In early August , the latter starts its meiosis and enters into its diplotene phase in early October and later goes through dormancy in this form .