雄核發育 的英文怎麼說
中文拼音 [xiónghéfāyù]
雄核發育
英文
andrigenesis-
Using the hprt gene as a positive control, our result suggested that both the testis tissue and the male embryos from which sry transcription can be detected failed to yield any positive results of xist. female embryos at the pronucleus stage and 2 - cell failed to produce any positive result of sry and xist too. while since the 4 - cells period, xist is constantly transcribed until blastocyst stages
然後利用實驗一確定的pcr條件，以hprt為陽性對照，用巢式rt - pcr對小鼠早期胚胎進行xist基因的轉錄分析，結果發現，轉錄sry基因的睪丸組織以及雄性胚胎，從受精卵發育到囊胚的過程中，基本上不轉錄xist基因；不轉錄sry基因的雌性卵母細胞和雌性胚胎，從出現原核開始，到發育至2 -細胞期的過程中， xist基因一直不轉錄，但是，從4 -細胞期開始，一直到孵化前囊胚階段，雌性胚胎都轉錄xist基因。The formation of the population of the allotetraploid hybrids of red crucian carp and common carp is the first case in the world which both the female and the male of allotetraploids are fertile, they are the good materials for studying the biological characteristic of tetraploid animals, this paper reports the hereditary characters of allotetraploids including the stability of hereditary gynogenesis and androgenesis
異源四倍體鯽鯉是世界上首例人工培育的兩性可育的四倍體魚，這為研究四倍體的生物學特性提供了良好的實驗材料，本文對異源四倍體鯽鯉的遺傳特性進行了研究，主要包括其遺傳穩定性、雌核發育、雄核發育方面的研究。The endosperm is usually triploid and develops from the primary endosperm nucleus, the triploid nucleus resulting from the fusion of one of the male gametes from the pollen tube with the polar nuclei in the embryo sac
胚乳通常是三倍體，由初生胚乳核發育而來，三倍體核來源於花粉管中的雄配子與胚囊中兩個極核的融合。In order to select male nucleo - sterile new genotype, a tentative idea was put forward for the nucleo - male sterility to attach a tps ( thermo - photoperiod sensitivity ) and a selection strategy of combination of selection and identification, at the same time, the spring and summer sowing method were used to provide different environment conditions of appraising sterility and tps. the results indicated that ( 1 ) sterility could be appraised under the spring sowing environment and tps could be appraised under summer sowing environment. ( 2 ) under spring sowing environment, sterility could be selected, but not maintained. thereby, lines selected could only be selected as recorded selection method in the experiment. ( 3 ) and then, selection was carried out from spring sowing line selected into summer sowing in same line with tps to select plants. these plants through the intercrossing selection had been combined with sterility and tps. in this way, a new selection protocol for selection sterile line with tps was formed. it mainly involves the spring and summer sowing method, recorded selection method and the intercrossing selection method
為了選育新類型玉米雄性核不育系，提出了為玉米核不育性添加溫光敏感性的設想和選擇與鑒定相結合的策略，同時應用分期播種的方法為作物提供不同的生長和發育的環境條件，以鑒定玉米雄穗的育性變化和對不同環境條件溫光的反應.研究結果表明，春播環境下可鑒定和選擇玉米的不育性，夏播環境下可鑒定和選擇其溫光敏感性.針對玉米核不育性難以找到保持系的特性，結合兩種播期選擇兩種性狀.但春播環境下選擇的不育性群體難以通過選擇單株來保持其不育性，為記錄性群體選擇.通過從春播入選的雜合不育性優良株系群體轉移到其對應的夏播溫光敏感性入選的同一優良群體中進行優良單株選擇，能逐漸使不育性和溫光敏感性相結合而選育出純合溫光敏不育系.這種新的選擇程序主要包括應用分期播種法、記錄性選擇法和春夏兩季交叉式選擇法，使含有不育基因的可育株系逐步累積不育基因並增加了溫光敏感性而育成玉米溫光敏不育系Dong a, the male sterile line of cotton discovered in 1972 from a pollenless mutant of cotton variety dongting no. l, is an ideal materials used to study the pollen - specific genes during anther development. the fertile individuals and its pollenless mutant have a highly homogeneous genetic background except for the male sterility
棉花洞a雄性核不育系是1972年從洞庭一號棉花原種圃中發現的突變體，不育度高且穩定，可育與不育花粉在單核期以前發育同步，是研究棉花花藥與花粉發育相關基因的理想材料。In order to explore the seedless mechanism of ponkan ( citrus reticulata blanco ), new seedless ponkan cultivar lipeng no. 2 and common seedy ponkan cultivar were used as materials for observing fertility and compatibility of male and female gametophyte
摘要為系統探明?柑無核發生的機制，以無核?柑新品種麗? 2號和普通有核?柑為試材，對雌雄配子體的育性和親和性進行了觀察。3. the androgenesis of a ilotetraploid hybrids in 2002, the goldfish " s female nucleus were inacted by using uv rays to irradiate the eggs, the diploid s
2003年用失活的墨龍的卵子與四被體魚的二倍體精子「受精」 ，獲得了82尾雄核發育實驗魚。分享友人