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| 1 | Establishment of the diploid gynogenetic hybrid clonal line of red crucian carp × common carp显示文摘This study investigated the gynogenetic cytobiological behavior of the third gynogenetic generation (G3), which was generated from the diploid eggs produced by the second gynogenetic generation (G2) of red crucian carp × common carp, and determined the chromosomal numbers of G3, G2×scatter scale carp and G2×allotetraploid hybrids of red crucian carp × common carp. The results showed that the diploid eggs of G2 with 100 chromosomes, activated by UV-irradiated sperm from scatter scale carp and without the treatment for doubling the chromosomes, could develop into G3 with 100 chromosomes. Similar to the first and second gynogenetic generations (G1 and G2), G3 was also diploid (2n=100) and presented the hybrid traits. The triploids (3n=150) and tetraploids (4n=200) were produced by crossing G2 with scatter scale carp and crossing G2 with allotetraploids, respectively. The extrusion of the second polar body in the eggs of G2 ruled out the possibility that the retention of the second polar body led to the formation of the diploid eggs. In addition, we discussed the mechanism of the formation of the diploid eggs generated by G2. The establishment of the diploid gynogenesis clonal line (G1, G2 and G3) provided the evidence that the diploid eggs were able to develop into a new diploid hybrid clonal line by gynogenesis. By producing the diploid eggs as a unique reproductive way, the diploid gyno- genetic progeny of allotetraploid hybrids of red crucian carp × common carp had important signifi- cances in both biological evolution and production application. | LIU ShaoJun, DUAN Wei, TAO Min, ZHANG Chun, SUN YuanDong, SHEN JiaMin, WANG Jing, LUO KaiKun & LIU Yun Key Laboratory of Protein Chemistry and Fish Developmental Biology of Education Ministry of China, College of Life Sciences, Hunan Normal University, Changsha 410081, China | 2007 | Science China(Life Sciences)2007，50，2： | 21 |
| 2 | Biological characteristics of an improved triploid crucian carp显示文摘An improved triploid crucian carp(ITCC) was produced by crossing improved tetraploids(G1×AT,) with improved red crucian carp(IRCC,),which were obtained by distant crossing and gynogenesis.The biological characteristics of ITCC,including the number and karyotype of chromosomes,gonadad and pituitary structures,phenotype,and growth rate are reported.ITCC possessed 150 chromosomes with the karyotype 33m+51sm+33st+33t.In the breeding season,both ovary-like and testis-like gonads of ITCC were unable to produce normal mature gametes.The ultrastructure of the pituitary of ITCC showed that most of the endocrine granules in gonadotrophic hormone(GTH) cells had not been released,providing endocrinological evidence for the sterility of ITCC.Compared with triploid crucian carp(TCC) produced by mating Japanese crucian carp with allotetraploid hybrids,ITCC not only retained the excellent traits of fast growth rate and sterility,but also acquired improved morphological characteristics,including higher body,shorter tail and smaller head. | CHEN Song,WANG Jing,LIU ShaoJun,QIN QinBo,XIAO Jun,DUAN Wei,LUO KaiKun,LIU JinHui & LIU Yun Key Laboratory of Protein Chemistry and Developmental Biology of State Education Ministry of China,College of Life Sciences,Hunan Normal University,Changsha 410081,China | 2009 | Science China(Life Sciences)2009，52，8： | 14 |
| 3 | Rapid growth and sterility of growth hormone gene transgenic triploid carp显示文摘Triploid carp(100%)with 150(3n=150)chromosomes were obtained by crossing the females of improved tetraploid hybrids(♀, 4n=200)of red crucian carp(♀)×common carp(♂)with the males of diploid yellow river carp(♂,2n=100).The crosses yielded transgenic triploid carp(positive triploid fish,44.2%of the progeny)and non-transgenic triploid carp(negative triploid fish). Histological examination of the gonads of 24-month-old positive triploid fish suggested they were sterile and the fish were not able to produce mature gametes during the breeding season.Morphologically,both the positive and negative triploid fish were similar.They had a spindle-shaped,laterally compressed,steel grey body with two pairs of barbells.Most of the quantifiable traits of the triploid carp were intermediate between those of the two parents.The positive and negative triploid fish were raised in the same pond for 2 years.The mean body weight of the positive triploid fish was 2.3 times higher than the negative triploid fish.The weight of the largest positive triploid fish was 2.91 times higher than that of the largest negative triploid fish.Thus,we produced fast-growing transgenic triploid carp that have a reduced ecological risk because of their inability to mate and produce progeny. | YU Fan XIAO Jun LIANG XiangYang LIU ShaoJun ZHOU GongJian LUO KaiKun LIU Yun HU Wei WANG YaPing ZHU ZuoYan | 2011 | Chinese Science Bulletin2011，56，16： | 11 |
| 4 | Formation and biological characterization of three new types of improved crucian carp显示文摘The improved tetraploids (G1×AT) were obtained by distant crossing and gynogenesis and the high-body individuals accounted for 2% among G1×AT. After mating with each other, the high-body in- dividuals produced three kinds of bisexual fertile diploid fishes: high-body red crucian carp, high-body fork-like-tails goldfish and gray common carp. The high-body red crucian carp mating with each other formed three types of improved crucian carp (ICC) including improved red crucian carp (IRCC), im- proved color crucian carp (ICCC) and improved gray crucian carp (IGCC). The phenotypes, chromo- some numbers, gonadal structure and fertility of the three kinds of ICC and their offspring were observed. All the three kinds of ICC possessed some improved phenotypes such as higher body, smaller head and shorter tail. The ratios of the body height to body length of IRCC, ICCC and IGCC were 0.54, 0.51 and 0.54, respectively. All of them were obviously higher than that of red crucian carp 0.41 (P<0.01). Three kinds of ICC had the same chromosome number as red crucian carp with 100 chromosomes. All the ICC possessed normal gonads producing mature eggs or sperm, which was important for the production of an improved diploid population. Compared with red crucian carp, all the ICC had stronger fertility such as higher gametes production, higher fertilization rate and higher hatchery rate. Three types of improved diploid fish population were generated from the three kinds of ICC by self-crossing, respectively. The ICC can serve as ornamental fish and edible fish. They are also ideal parents to produce triploids by mating with tetraploids. The new ICC plays an important role in biological evolution and fish genetic breeding. | WANG Jing, QIN QinBo, CHEN Song, LIU ShaoJun, DUAN Wei, LIU JinHui, ZHANG Chun, LUO KaiKun, XIAO Jun & LIU Yun Key Laboratory of Protein Chemistry and Developmental Biology of Ministry of Education of China, College of Life Sciences, Hunan Normal University, Changsha 410081, China | 2008 | Science China(Life Sciences)2008，51，6： | 8 |
| 5 | Genomic variation in the hybrids of white crucian carp and red crucian carp: evidence from ribosomal DNA显示文摘In this study, we conducted a cross of white crucian carp(♀)×red crucian carp(♂)(WR), and characterized the morphology, reproduction and genetics of the progeny. Different from parents, WR with the gray color showed the hybrid morphological traits of both parents. WR possessed normal gonads producing mature eggs or sperm, and exhibited high fertilization rate(90.2%) and high hatchery rate(80.5%), which contributed to produce and enlarge the population. WR with the same DNA content as parents was a diploid fish with 100 chromosomes(2n=100). Amplified ITS of 45 S r DNA, in WR the sequences consisting of 884 bp bases of the entire ITS-1 region, 5.8 S region, and entire ITS-2 region. The sequences showed high similarity between WR and its parents and leaned towards male inheritance. In WR, NTS of 5S r DNA consisted of three length types with total 654 bp bases. From sequence analysis of NTS, WR shared 94.2% and 95.1% similarities with their female and male parent, respectively. Sequence analysis of ITS and NTS revealed that there existed recombination and variation in the hybrid progeny, which was the genetic base for adaptation and speciation. In conclusion, we obtained WR from hybridization and it exhibited hybrid traits in morphology and variation in genetic composition showing essential difference with its parents. The obtainment of WR has important significance in fish genetic breeding. | WANG Jing XIAO Jun ZENG Ming XU Kang TAO Min ZHANG Chun DUAN Wei LIU WenBin LUO KaiKun LIU Yun LIU ShaoJun | 2015 | Science China(Life Sciences)2015，58，6： | 7 |
| 6 | Establishment and application of distant hybridization technology in fish显示文摘Hybridization is widely used. However, for a long time, systematic theories and technologies related to hybridization in fish have been lacking. In this study, through long-term systematic research, we investigated and obtained the main rules regarding inheritance and reproduction related to fish distant hybridization. Furthermore, we established one-step and multistep breeding technologies that were suitable for interspecific hybridization and intraspecific hybridization. Simultaneously, we used these two breeding technologies to produce a batch of diploid fish lineages and tetraploid fish lineages and improved fishes. In addition, we widely discuss the methods, technologies and results of hybridization breeding, referring to the domestic and foreign literature on fish hybridization. We hope that this paper will be beneficial for the research and application of fish hybrid breeding. | Shi Wang Chenchen Tang Min Tao Qinbo Qin Chun Zhang Kaikun Luo Rurong Zhao Jing Wang Li Ren Jun Xiao Fangzhou Hu Rong Zhou Wei Duan Shaojun Liu | 2019 | Science China(Life Sciences)2019，62，1： | 6 |
| 7 | A new type of triploid crucian crap—red crucian carp (♀)×allotetraploid (♂)显示文摘A new type of triploid hybrids (TC) was produced by crossing red crucian carp (♀) with allotetraploid hybrids (♂). This type of triploids with no barbel was spindle-shaped and gray in color. Compared with their parents, some data of the morphological traits in the triploid hybrids were intermediate to those of their parents, and some were beyond their parents with heterozygous traits. Under the same culture conditions, the growth rate of the new type triploids was faster than their maternal red crucian carp (RC). The gonadal development of triploids was obviously slower than that of diploids, and the germ cells in them were degenerated. Compared with another type of triploids produced by Japanese crucian carp (♀) with allotetraploid hybrids (♂), the new type triploids not only kept faster growth rate and sterility, but also had no barbel that was similar to the common carp. The absence of the barbel in the new type of triploids has the important significance in both the inheritance and fish breeding. | SHEN Jiamin LIU Shaojun SUN Yuandong ZHANG Chun LUO Kaikun TAO Min ZENG Chen LIU Yun | 2006 | Progress in Natural Science:Materials International2006，16，12： | 6 |
| 8 | Effects of CO_(2)atmosphere on slow pyrolysis of high-ash lignite显示文摘Slow pyrolysis of a typical high-ash lignite in China was carried out in atmospheres of N_(2),20%CO_(2)/N_(2),40%CO_(2)/N_(2),and 60%CO_(2)/N_(2)in a fixed bed reactor.The evolution of char,tar,and gases in yield and characteristics,and the physico-chemical characteristics of chars in different atmospheres were compared.Results revealed that CO_(2)almost behaves as an inert gas in the evolution of char and CO before 600℃.The decrease in char and CO_(2)yields and the increase in CO yield at temperatures higher than 600℃are ascribed to the occurrence of char-CO_(2)gasification.The higher the CO_(2)level present in the atmosphere,the higher the severity of the gasification becomes.Introducing CO_(2)into the atmosphere raises tar and water yields but cuts down H_(2),CH_(4),and C_(2)H_(6)yields.The promotion of tar yield results from the higher phenols and aliphatics yields in the presence of CO_(2).The reduction of H_(2)yield is associated with the increase in water yield,while the decline of light hydrocarbon gases is connected with the suppression effects of CO_(2)on methyl decomposition.The role of inherent minerals was also investigated by comparing product yields from raw coal and demineralized coal.The comparison indicated that the char-CO_(2)gasification rate is sharply reduced to nearly zero without the catalytic effects of calcium,iron,and magnesium minerals.The evolution of tar and light hydrocarbon gases in the CO_(2)-containing atmosphere greatly depends on inherent minerals.Without minerals,tar yield is inhibited in the presence of CO_(2).In the absence of minerals,CO_(2)hardly has influences on CH_(4)and C_(2)H_(6)yields. | Qinhui Wang Kaikun Li Zhihang Guo Mengxiang Fang Zhongyang Luo Kefa Cen | 2018 | Carbon Resources Conversion2018，1，1： | 4 |
| 9 | Further evidence for paternal DNA transmission in gynogenetic grass carp显示文摘Gynogenesis is an important breeding method in aquaculture and has been widely applied to many fish species.If gynogenetic progenies are to inherit paternal partial genomic DNA,this will increase genetic variation and will provide a useful outcome for breeding.In this study,we investigated the genetic variation in homeobox(Hox)gene clusters(Hox A4 a,Hox A9 a,Hox A11 b,Hox B1 b,Hox C4 a,Hox C6 b,and Hox D10 a)among koi carp(Cyprinus carpio haematopterus,KOC;the stimulation sperm source),grass carp(Ctenopharyngodon idellus),and gynogenetic grass carp(GGC).We found paternal DNA(a special DNA fragment and Hox C6 b)derived from KOC and a recombinant gene belonging to Hox C6 b in GGC.We are the first to report the recombinant Hox C6 b in GGC.Our study provides further evidence for paternal DNA transmission to gynogenetic progenies,which is a finding with great significance for the genetic breeding of fish. | Zhuangwen Mao Yeqing Fu Shi Wang Yude Wang Kaikun Luo Chun Zhang Min Tao Shaojun Liu | 2020 | Science China(Life Sciences)2020，63，9： | 2 |
| 10 | miR-199-5p regulates spermiogenesis at the posttranscriptional level via targeting Tekt1 in allotriploid crucian carp显示文摘Background:Sperm abnormalities are one of the primary factors leading to male sterility,but their pathogenesis is still unclear.Although miRNAs are suggested to exert important roles in the regulation of spermatogenesis at both transcriptional and posttranscriptional levels,little is currently known regarding the regulation of sperm flagella assembly by microRNAs(miRNAs).The role of miRNAs in the development of sperm abnormalities in sterile triploid fish has not been studied.Results:In this study,we found that miR-199-5p was widely expressed in all detected tissues of different-ploidy crucian carp.As one of the testis-specific candidate markers,Tekt1 was predominantly expressed in the testis.Quantitative real-time PCR(qRT-PCR)analyses showed that the expression trend of miR-199-5p was exactly opposite to that of Tekt1.Through bioinformatics analysis,we identified a putative miR-199-5p binding site in the Tekt1 mRNA.We further identified Tekt1 as a target of miR-199-5p using luciferase reporter assay.Finally,we confirmed that miR-199-5p was necessary for sperm flagellar assembly and spermatogenesis in vivo via intraperitoneal injection of miR-199-5p antagomir or agomir in diploid red crucian carp.Moreover,miR-199-5p gainof-function could lead to spermatids apoptosis and abnormal spermatozoa structure,which is similar to that of allotriploid crucian carp.Conclusions:Our studies suggested that abnormally elevated miR-199-5p inhibited the sperm flagella formation in spermiogenesis by negatively regulating the expression of Tekt1,thereby causing sperm abnormalities of male allotriploid crucian carp. | Shengnan Li Qiubei Wang Lu Huang Siyu Fan Ting Li Yuqing Shu Chun Zhang Yi Zhou Qingfeng Liu Kaikun Luo Min Tao Shaojun Liu | 2022 | Journal of Animal Science and Biotechnology2022，13，5： | 1 |
| 11 | Preparation and characterization of dendritic composite magnetic particles as a novel enzyme immobilization carrier显示文摘 | Zeng Li Luo Kaikun Gong Yuefa | 2006 | Journal of Molecular Catalysis B:Enzymatic2006，38，1： | 1 |
| 12 | Embryonic development and organogenesis of Chinese giant salamander,Andrias davidianus显示文摘The morphology and organogenesis of Chinese giant salamander, Andrias davidianus, in its different developmental periods and stages are described in detail, which provides an intact criterion for distinguishing different stages of its developmental process. Based on the external morphological and internal histological features, six periods including 20 stages of organogenesis of Chinese giant salamander are established, which are cleavage period, blastula period, gastrula period, neurula period, organogenesis stage and hatching stage. Generally, the embryonic development of Chinese giant salamander is consistent with those of Eastern newt, Cynops orientalis, and Black spots frog, R. nigromaculata. However, they have some differences in the early cleavage process and the development of digestive system. The cleavage of Chinese giant salamander, A. davidianus is not a discoidal division type, which is different from other species reported. And the first three cleavages being meridional and a retardant development of its digestive system without halter and sucker existing are the evident features of the embryonic development of Chinese giant salamander. | Luo Jian Xiao Yamei Luo Kaikun Huang Xiaoxi Peng Liangyue Liu Yun | 2007 | Progress in Natural Science:Materials International2007，17，11： | 1 |
| 13 | An improved hybrid bream derived from a hybrid lineage of Megalobrama amblycephala(♀)×Culter alburnus(♂)显示文摘Distant hybridization is an important technique in fish genetic breeding.In this study,based on the establishment of an allodiploid fish lineage(BT,2n=48,F_(1)–F_(6))derived from distant hybridization between female Megalobrama amblycephala(BSB,2n=48)and male Culter alburnus(TC,2n=48),and the backcross progeny(BTB,2n=48)derived by backcrossing female F_(1) of BT to male BSB,an improved hybrid bream(BTBB,2n=48)was obtained by backcrossing BTB(♀)to BSB(♂).Moreover,the morphological and genetic characteristics of BTBB individuals were investigated;BTBB was similar to BSB in appearance but had a higher body height than BSB.The study results regarding chromosome numbers and DNA content indicated that BTBB is a diploid hybrid fish.The 5S rDNA and Hox gene of BTBB were inherited from the original parents.Gonadal development in BTBB was normal.On the other hand,BTBB had a faster growth rate,higher muscle protein level,and lower muscle carbohydrate level than BSB.Hence,bisexual fertile BTBB is promoted and can be applied as a high-quality fish,and it can also be used as a new fish germplasm resource to develop high-quality fish further.Thus,this study is of great significance for fish genetic breeding. | Dingbin Gong Min Tao Lihui Xu Fangzhou Hu Zehong Wei Shi Wang Yude Wang Qingfeng Liu Chang Wu Kaikun Luo Chenchen Tang Rong Zhou Chun Zhang Yuequn Wang Shaojun Liu | 2022 | Science China(Life Sciences)2022，65，6： | 0 |
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