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Construction of an integrated linkage map of sugarcane using unigene-derived microsatellite (SSR) markers 利用单基因微卫星(SSR)标记构建甘蔗综合联系图
Pub Date : 2024-11-26 DOI: 10.1016/j.repbre.2024.11.002
Sujeet P. Singh , Jyoti Rasogi , Chethana Ck , R.K. Singh , A. Nigam , Ram Baran Singh
Sugarcane (Saccharum officinarum L.) is one of the key agro-industrial crops that produce raw sugar and bio-fuel ethanol, which contributes to sustainable national economy, food and nutritional security in tropical areas globally. Traditional sugarcane breeding practices are tedious and labour-intensive practice to develop elite high-yielding and resistant cultivars. Sugarcane improvement based on high-throughput techniques to develop traits linked DNA markers through establishing marker-trait associations using linkage analysis. The SSR and markers offer a user-friendly and cost-efficient genomic tool for marker-trait linkage analysis in crop species. In the current study, an integrated sugarcane genetic linkage map was constructed with SSR and TRAP molecular markers using 226 progenies derived from a bi-parental (UP 9530 × Co 86,011) mapping population. The biparental mapping population (266 progenies) was genotyped which generated a total of 815 polymorphic loci with 96 SSR and 11 TRAP primer combinations. Out of 815 markers, 324 markers were scattered onto 107 linkage groups (LGs) and for all the linkage maps, the cumulative genome length was found to be 7608.7 cM, with an average length of 71.11 cM per LG. The length of LGs was ranging from 0.06 to 238.44 cM, with an average of 23.48 cM between two adjacent markers and the number of markers per LG varied from 2 to 11. Out of 324 linked markers, 232 (71.60 %) were found to be single dose (1:1) and 92 (28.39 %) double single dose (3:1) in segregation pattern in genotyping. All the LGs with common markers on individual maps were merged to construct an integrated map using a map integration tool. Future research will be focused on validation of the linked markers in sugarcane involves a combination of phenotypic studies, molecular analysis, genetic mapping, and field trials. This ensures the marker is accurate, reliable, and applicable across different environments and genetic backgrounds. Moreover, the developed SSR-based linkage map will be a useful suit for understanding genetic architecture, marker-assisted breeding for improving yield and quality, identifying disease resistance genes, and accelerating genetic research in polyploid sugarcane and other related polyploidy crop species.
甘蔗(Saccharum officinarum L.)是生产原糖和生物燃料乙醇的主要农用工业作物之一,有助于全球热带地区国民经济的可持续发展以及粮食和营养安全。传统的甘蔗育种方法繁琐且劳动密集,难以培育出高产、抗性强的优良品种。甘蔗改良以高通量技术为基础,通过联系分析建立标记与性状之间的联系,开发与性状相关的 DNA 标记。SSR 和标记为农作物物种的标记-性状关联分析提供了一种用户友好且经济高效的基因组工具。在本研究中,利用双亲(UP 9530 × Co 86,011)制图群体的 226 个后代,使用 SSR 和 TRAP 分子标记构建了甘蔗综合遗传连锁图谱。对双亲制图群体(266 个后代)进行了基因分型,通过 96 个 SSR 和 11 个 TRAP 引物组合共产生了 815 个多态位点。在 815 个标记中,有 324 个标记分布在 107 个连接组(LG)上,所有连接图的基因组累积长度为 7608.7 cM,每个 LG 的平均长度为 71.11 cM。LG 的长度从 0.06 到 238.44 cM 不等,两个相邻标记之间的平均长度为 23.48 cM,每个 LG 的标记数从 2 到 11 不等。在 324 个连锁标记中,232 个(71.60%)为单剂量(1:1),92 个(28.39%)为双单剂量(3:1)。利用图谱整合工具,对单个图谱上具有共同标记的所有 LGs 进行了合并,构建了一个整合图谱。今后的研究重点将是对甘蔗中的连锁标记进行验证,包括表型研究、分子分析、基因图谱绘制和田间试验。这将确保标记准确、可靠,并适用于不同的环境和遗传背景。此外,所开发的基于 SSR 的连接图将成为了解遗传结构、提高产量和品质的标记辅助育种、鉴定抗病基因以及加速多倍体甘蔗和其他相关多倍体作物物种遗传研究的有用工具。
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引用次数: 0
Genetic and cytogenetic analysis of Moringa oleifera short and long capsule phenotypes 油杉长短蒴果表型的遗传和细胞遗传分析
Pub Date : 2024-11-12 DOI: 10.1016/j.repbre.2024.10.002
Martha Gómez-Martínez , Jesús David García-Ortiz , Susana Gómez-Martínez , Adriana C. Flores-Gallegos , M. Humberto Reyes-Valdés , Jesús A. Morlett-Chávez , Raúl Rodríguez-Herrera
Cytogenetic and molecular studies hold significant importance in plant breeding programs. In the case of moringa, such studies are scarce. Therefore, the objective of this research was to determine the chromosomal number and genetic diversity parameters in two phenotypes of Moringa oleifera Lam. (short and long capsule) using chromosomal analysis and ISSR markers, respectively. Cytogenetic analyses were conducted using the “Somatic chromosomes in root apices” technique, with acetocarmine and papain for staining. It was possible to identify 2N = 28 chromosomes in a single cell of the long capsule phenotype, ranging in size from 0.05 to 0.10 μm. Cells in both moringa phenotypes were observed in prophase, metaphase, anaphase, and telophase. High genetic variability was found in both phenotypes of moringa, as indicated by a Shannon index of 0.81. Additionally, the principal component analysis and UPGMA (Unweighted Pair-Group Method with Arithmetic) groups revealed genetic isolation between the studied moringa phenotypes. The significant polymorphism obtained with most primers suggests that the tested ISSR markers are highly useful for studying genetic diversity in moringa. These findings provide a robust foundation for future research in genetic improvement and conservation of moringa, highlighting the relevance of cytogenetic and molecular studies in this species.
细胞遗传学和分子研究在植物育种计划中具有重要意义。就辣木而言,此类研究很少。因此,本研究的目的是利用染色体分析和 ISSR 标记,确定 Moringa oleifera Lam.(短蒴果和长蒴果)的染色体数目和遗传多样性参数。细胞遗传学分析采用 "根尖体细胞染色体 "技术,并用乙酰卡胺和木瓜蛋白酶进行染色。在长蒴果表型的单个细胞中可以鉴定出 2N = 28 条染色体,大小从 0.05 到 0.10 μm。在原分裂期、移行分裂期、无形变期和端粒期都观察到了这两种形态的细胞。两种表现型的莫林格都具有很高的遗传变异性,香农指数为 0.81。此外,主成分分析和 UPGMA(非加权配对组算术法)分组显示,所研究的辣木表型之间存在遗传隔离。大多数引物都具有明显的多态性,这表明测试的 ISSR 标记对研究辣木的遗传多样性非常有用。这些发现为今后的辣木遗传改良和保护研究奠定了坚实的基础,突出了对该物种进行细胞遗传学和分子研究的意义。
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引用次数: 0
Masculinization? Rare variation in canine length among female water deer (Hydropotes inermis) can lead to errors in sex identification 男性化?雌性水鹿(Hydropotes inermis)犬齿长度的罕见变异可能导致性别鉴定错误
Pub Date : 2024-11-11 DOI: 10.1016/j.repbre.2024.10.001
Seong-Min Lee
Most cervids feature antlers for mate competition, but water deer possess uniquely elongated maxillary canines instead. This study examined the presence of elongated canines, a trait usually seen in males, in female water deer from 185 individuals culled in South Korea. Measurements of body length, height, and mass were recorded, along with assessments of reproductive capability. The results showed that 1.6 % of the females exhibited elongated canines, retaining their fertility. Their body sizes remained within the typical range for their same age group, with their canines continuing to grow for at least three years. Thus, this rare variation, which is similar to males, may lead to infrequent errors in sex identification based on physical appearance.
大多数鹿科动物都有用于竞争配偶的鹿角,但水鹿却拥有独特的细长上颌犬齿。这项研究考察了在韩国捕杀的 185 头雌性水鹿身上是否存在通常见于雄性的细长犬齿。研究记录了雌鹿的体长、身高和体重,并对其繁殖能力进行了评估。结果显示,1.6% 的雌性水鹿表现出犬齿变长,但仍保持着生育能力。它们的体型保持在同年龄组的典型范围内,犬齿继续生长至少三年。因此,这种罕见的变异与雄性相似,可能会导致根据外貌进行性别鉴定时出现不常见的错误。
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引用次数: 0
Semen characteristics, freezability, and application of motility-based protein markers (proAKAP4) in assessing the suitability of superior Bali bulls (Bos sondaicus) at the Regional AI Center 精液特征、可冷冻性和运动性蛋白标记(proAKAP4)在地区人工授精中心评估优质巴厘公牛(Bos sondaicus)适用性中的应用
Pub Date : 2024-10-15 DOI: 10.1016/j.repbre.2024.09.005
Kudratullah , Raden Iis Arifiantini , Enny Yuliani , Berlin Pandapotan Pardede , Syahruddin Said , Bambang Purwantara
The use of molecular markers in selecting superior bulls, including Bali bulls, for the AI program will significantly increase reproductive efficiency and affect the economic aspects of several countries, especially in the livestock industry sector. Motility-based protein markers, proAKAP4, as one of the molecular markers that have recently been developed in the breeding industry, are expected to be applied and used at AI centers in Indonesia to optimize the use of superior Bali bulls, which are also supported by various semen and freezability characteristics. Using all Bali bulls from the Regional AI center in one of the provinces in Indonesia, this study divided the bulls into motility grade A and motility grade B groups. The collected semen is tested using various methods based on the literature, including fresh and frozen semen and sperm freezability. The proAKAP4 was quantified using the Bull 4MID® Kit with ELISA. The characteristics of fresh semen were significantly different (P < 0.05) except for sperm abnormalities (P > 0.05). The frozen semen characteristics were significantly different (P < 0.05) regarding plasma membrane integrity, DNA fragmentation, and several kinematic parameters. There was no significant difference (P > 0.05) in the freezability characteristics of Bali bull sperm. ProAKAP4 was significantly (P < 0.05) more abundant in the motility grade B bull group and was closely correlated (P < 0.05) with progressive motility and sperm viability. Motility-based protein markers, proAKAP4, can be applied to bulls at the Regional AI Center, with quantification results showing that half of the bull population used in research does not meet the fitness standards for superior bulls.
在人工授精计划中使用分子标记来选择包括巴厘岛公牛在内的优良公牛,将大大提高繁殖效率,并影响多个国家的经济方面,尤其是畜牧业部门。基于运动能力的蛋白标记 proAKAP4 是最近在育种行业开发的分子标记之一,有望在印尼的人工授精中心得到应用和使用,以优化优良巴厘岛公牛的使用,这些公牛还具有各种精液和可冷冻性特征。本研究使用印尼某省地区人工授精中心的所有巴厘公牛,将公牛分为活力 A 级和活力 B 级两组。收集的精液根据文献采用各种方法进行检测,包括新鲜和冷冻精液以及精子冷冻性。使用公牛 4MID® 酶联免疫吸附试剂盒对 proAKAP4 进行定量检测。除精子畸形(P >0.05)外,新鲜精液的特征均有显著差异(P <0.05)。冷冻精液在质膜完整性、DNA碎片和几个运动参数方面有明显差异(P < 0.05)。巴厘公牛精子的冷冻特性无明显差异(P > 0.05)。ProAKAP4 在活力等级 B 公牛组中含量明显更高(P <0.05),并且与精子活力和精子存活率密切相关(P <0.05)。以运动能力为基础的蛋白质标记--proAKAP4--可应用于地区人工授精中心的公牛,量化结果显示,用于研究的公牛群体中有一半不符合优良公牛的体能标准。
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引用次数: 0
Progress on stress resistance breeding in fish 鱼类抗逆育种的进展
Pub Date : 2024-10-02 DOI: 10.1016/j.repbre.2024.09.004
Jie Hu , Jie Yang , Huan Liao
With the continuing development of the aquaculture industry, the stress associated with many environmental factors has severely restricted the growth of fish, reduced fish resistance to disease, and had a large negative impact on fishery production. Therefore, it is of great importance for the sustainable development of aquaculture to cultivate new fish varieties with strong stress resistance. Traditional hybridization and gynogenesis, selective breeding, modern breeding techniques such as molecular marker-assisted breeding and whole genome selection breeding can be used to develop efficient and accurate fish breeding strategies, and to cultivate new fish varieties with high stress resistance. This paper reviews the status of research on fish breeding for disease resistance, cold resistance, high temperature tolerance, hypoxia tolerance, salt tolerance, saline-alkali tolerance as well as non-specific stress resistance traits, analyzes trends in research on fish breeding for stress tolerance, and explores future development directions. Furthermore, this paper proposes new ideas for fish seed industry innovation to promote its continuous and sustainable development.
随着水产养殖业的不断发展,许多环境因素带来的应激严重制约了鱼类的生长,降低了鱼类的抗病能力,对渔业生产产生了较大的负面影响。因此,培育抗逆性强的鱼类新品种对水产养殖业的可持续发展具有重要意义。传统的杂交育种和雌核发育、选择性育种、分子标记辅助育种和全基因组选择育种等现代育种技术可用于制定高效、准确的鱼类育种策略,培育抗逆性强的鱼类新品种。本文综述了鱼类抗病、抗寒、耐高温、耐缺氧、耐盐、耐盐碱以及非特异性抗逆性状的育种研究现状,分析了鱼类抗逆育种的研究趋势,探讨了未来的发展方向。此外,本文还提出了鱼类种业创新的新思路,以促进鱼类种业的持续和可持续发展。
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引用次数: 0
Innovation of carp germplasm and its research progress 鲤鱼种质创新及其研究进展
Pub Date : 2024-09-27 DOI: 10.1016/j.repbre.2024.09.003
Zhipeng Yang , Qinglin Xu , Xin Wang , Huan Liu , Yalan Zhang , Wei Chen , Sijin Fan , Junfeng Wu , Yaohui Li , Huan Zhong , Fangzhou Hu , Ming Wen , Kaikun Luo , Shi Wang
The artificial breeding of carp existed in China 8000 years ago. The breeding of carp played an important role in ancient Chinese history, and it still played a crucial role in modern aquaculture. The output of carp in China is very high, accounting for 8.42 % of the total output of freshwater products in 2023, ranking fifth in the total output of freshwater aquaculture fish. At the same time, carp is also the fish species with the highest number of new varieties bred in China. With the advent of the genomics era, breeding technologies have also made progress. This paper reviews the history and current status of carp farming, the germplasm resources of carp, and the application of fish genetic breeding technology in the germplasm innovation of carp.
早在 8000 年前,中国就有了人工养殖鲤鱼的历史。鲤鱼的养殖在中国古代历史上发挥了重要作用,在现代水产养殖中仍起着至关重要的作用。我国鲤鱼产量很高,2023 年占淡水产品总产量的 8.42%,居淡水养殖鱼类总产量的第五位。同时,鲤鱼也是我国培育新品种最多的鱼类品种。随着基因组学时代的到来,育种技术也在不断进步。本文综述了鲤鱼养殖的历史与现状、鲤鱼种质资源以及鱼类遗传育种技术在鲤鱼种质创新中的应用。
{"title":"Innovation of carp germplasm and its research progress","authors":"Zhipeng Yang ,&nbsp;Qinglin Xu ,&nbsp;Xin Wang ,&nbsp;Huan Liu ,&nbsp;Yalan Zhang ,&nbsp;Wei Chen ,&nbsp;Sijin Fan ,&nbsp;Junfeng Wu ,&nbsp;Yaohui Li ,&nbsp;Huan Zhong ,&nbsp;Fangzhou Hu ,&nbsp;Ming Wen ,&nbsp;Kaikun Luo ,&nbsp;Shi Wang","doi":"10.1016/j.repbre.2024.09.003","DOIUrl":"10.1016/j.repbre.2024.09.003","url":null,"abstract":"<div><div>The artificial breeding of carp existed in China 8000 years ago. The breeding of carp played an important role in ancient Chinese history, and it still played a crucial role in modern aquaculture. The output of carp in China is very high, accounting for 8.42 % of the total output of freshwater products in 2023, ranking fifth in the total output of freshwater aquaculture fish. At the same time, carp is also the fish species with the highest number of new varieties bred in China. With the advent of the genomics era, breeding technologies have also made progress. This paper reviews the history and current status of carp farming, the germplasm resources of carp, and the application of fish genetic breeding technology in the germplasm innovation of carp.</div></div>","PeriodicalId":74667,"journal":{"name":"Reproduction and breeding","volume":"4 4","pages":"Pages 243-253"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Indigenous cattle biodiversity in India: Adaptation and conservation 印度本土牛的生物多样性:适应与保护
Pub Date : 2024-09-27 DOI: 10.1016/j.repbre.2024.09.001
Sujith Kumar Sarang, Damodaran Sreekumar, Veerasamy Sejian
Indigenous breeds of cattle are suitable for varying climatic conditions of the tropical environment by virtue of a series of species-specific traits and adaptive strategies. Such traits and adaptive strategies could be generally classed into morphological/anatomical, physiological, behavioural, neuro-endocrine, haematological, and molecular and cellular features. At the same time, over the years it is found that the population of indigenous cattle is decreasing at a faster rate all over the world. This is mainly due to the preponderance of crosses of indigenous cattle with exotic/temperate high producing cattle for improved milk production. As a result, if suitable measures are not taken for conserving indigenous breeds of cattle, the diversity will go down drastically and may at one stage become highly endangered in status. For working out conservation plans and breeding strategies, the fundamental requirements include genetic characterization by means of gene and microsatellite markers along with evaluation of genetic variability, population structure and composition. Conserving the diversity of indigenous germplasm will help to choose breeds of cattle that adapt to changing climatic environment. Such an approach could help in formulating strategies for conservation and breeding plans and further could also lay the foundation for effective utilisation of indigenous cattle under different production systems.
本土牛种凭借一系列物种特有的特征和适应策略,适合热带环境的不同气候条件。这些特征和适应策略一般可分为形态/解剖、生理、行为、神经内分泌、血液学以及分子和细胞特征。与此同时,多年来人们发现,世界各地本土牛的数量正在以更快的速度减少。这主要是由于本地牛与外来/温带高产牛杂交,以提高产奶量。因此,如果不采取适当措施保护本土牛种,牛的多样性将急剧下降,并可能在某一阶段成为高度濒危物种。为了制定保护计划和育种战略,基本要求包括通过基因和微卫星标记进行遗传特征描述,同时对遗传变异、种群结构和组成进行评估。保护本土种质的多样性将有助于选择适应不断变化的气候环境的牛种。这种方法有助于制定保护战略和育种计划,还能为在不同生产体系下有效利用本地牛奠定基础。
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引用次数: 0
Study on sperm cryopreservation of hybrid fish derived from Carassius cuvieri (♀) × Carassius auratus red var (♂) 鲫鱼(♀)×红鲫鱼(♂)杂交鱼精子冷冻保存研究
Pub Date : 2024-09-26 DOI: 10.1016/j.repbre.2024.09.002
Qianqian Zeng , Yixuan Chen , Minyi Wang , Yinggang Li , Tao Dai , Weiling Qin , Yating Zhu , Chun Zhang , Yi Zhou , Qinbo Qin , Conghui Yang , Qianhong Gu
Cryopreservation of sperm is an effective method for conserving germplasm resources in fish genetic breeding. The high-quality hybrid fish (WR) derived from white crucian carp (Carassius cuvieri, WCC, ♀) and red crucian carp (C. auratus red var., RCC, ♂), possesses valuable traits such as high survival rates, strong resistance, and rapid growth, representing an important germplasm resources of crucian carp. This study compared the effects of different antifreeze solutions on sperm viability among three varieties (WR, WCC, and RCC) and examined changes in enzyme activity, fertilization rates, and hatching rates after cryopreservation, aiming to enhance the cryogenic sperm cryopreservation technique in hybrid fish and investigate the mechanisms underlying spermatozoa damage caused by cryopreservation. The results showed that the antifreeze combination of D14 with 15 % dimethyl sulfoxide (DMSO) had the best effect in preserving the sperm of WR and WCC, while D20 with 10 % DMSO was the optimal combination for RCC sperm. After ultra-low temperature preservation, the longevity, fertilization, and hatching rates of frozen sperm were significantly lower (P < 0.05) compared to fresh sperm. The enzyme activities of superoxide dismutase (SOD), lactate dehydrogenase (LDH), and creatine kinase (CK) were significantly decreased (P < 0.05) in spermatozoa, whereas they showed a significant increase (P < 0.05) in sperm plasma. Succinate dehydrogenase (SDH) activity was significantly reduced (P < 0.05) in frozen spermatozoa of RCC compared to fresh spermatozoa, and exhibited lower activity in frozen spermatozoa of WCC and WR. Additionally, SDH activity was significantly elevated (P < 0.05) in frozen sperm plasma, and glutathione reductase (GR) activity was significantly lower (P < 0.05) in both frozen sperm plasma and spermatozoa across all three species. The study demonstrated that cryopreservation had a significant effect on the enzyme activities of spermatozoa and sperm plasma in all three species. These findings provide important technical support for the conservation of high-quality fish germplasm resources, particularly for novel varieties resulting from distant hybridization in fish.
冷冻保存精子是鱼类遗传育种中保存种质资源的有效方法。白鲫(Carassius cuvieri,WCC,♀)与红鲫(C. auratus red var.,RCC,♂)的优质杂交鱼(WR)具有成活率高、抗性强、生长快等宝贵性状,是鲫鱼的重要种质资源。本研究比较了不同防冻液对WR、WCC和RCC三个品种精子活力的影响,并考察了冷冻保存后酶活性、受精率和孵化率的变化,旨在提高杂交鱼低温精子冷冻保存技术,探究冷冻保存造成精子损伤的机理。结果表明,D14与15%二甲基亚砜(DMSO)的防冻组合对WR和WCC精子的保存效果最好,而D20与10%二甲基亚砜(DMSO)的防冻组合对RCC精子的保存效果最佳。超低温保存后,冷冻精子的寿命、受精率和孵化率均显著低于新鲜精子(P < 0.05)。精子中的超氧化物歧化酶(SOD)、乳酸脱氢酶(LDH)和肌酸激酶(CK)的酶活性明显降低(P < 0.05),而精子血浆中的酶活性则明显升高(P < 0.05)。与新鲜精子相比,RCC 的冷冻精子中琥珀酸脱氢酶(SDH)活性明显降低(P < 0.05),而 WCC 和 WR 的冷冻精子中的琥珀酸脱氢酶活性较低。此外,冷冻精浆中的 SDH 活性明显升高(P < 0.05),而所有三个物种的冷冻精浆和精子中的谷胱甘肽还原酶(GR)活性都明显降低(P < 0.05)。研究表明,低温保存对所有三个物种的精子和精浆的酶活性都有显著影响。这些研究结果为保护优质鱼类种质资源,尤其是保护鱼类远缘杂交产生的新品种提供了重要的技术支持。
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引用次数: 0
The expression and function of gpr54a and gpr54b in allotriploid crucian carp and diploid red crucian carp (Carassius auratus red var.) gpr54a和gpr54b在异源三倍体鲫鱼和二倍体红鲫鱼中的表达和功能
Pub Date : 2024-09-26 DOI: 10.1016/j.repbre.2024.08.004
Lu Huang , Qiubei Wang , Shuxin Zhang, Faxian Yu, Shengnan Li, Huan Zhong, Rurong Zhao, Min Tao
The kisspeptin receptor (GPR54), a member of the G-protein-coupled receptors, plays a central role in regulating reproduction. However, research on GPR54 in allotriploid fish remains limited. In this study, we reported the full-length cDNAs, tissue expression, and localization of gpr54a and gpr54b in allotriploid crucian carp (ACC) and diploid red crucian carp (Carassius auratus red var., RCC). The full-length cDNAs of gpr54a in ACC and RCC were 2224 bp and 2218 bp, respectively. The full-length cDNAs of gpr54b in ACC and RCC were 1413 bp and 1182 bp, respectively. qRT-PCR revealed that ACC gpr54a and RCC gpr54a were highly expressed in the brain but had lower expression in peripheral tissues. Unlike gpr54a, ACC gpr54b and RCC gpr54b were highly expressed in the brain, liver, and muscle. During the breeding season, the expression of gpr54a in ACC was significantly lower than in RCC, but gpr54b had significantly higher expression in ACC than in RCC in the HPG axis. This finding suggested that gpr54a might promote ovarian development, while gpr54b might inhibit ovarian development. During the breeding season, ISH indicated abnormal ovarian development in ACC and found signals of gpr54a and gpr54b in several regions of the brain, pituitary, and ovary of ACC and RCC. These regions of the brain, pituitary, and ovary are associated with the secretion of several hormones related to reproductive regulation. Hence, we hypothesized that the lower expression of gpr54a and higher expression of gpr54b in ACC might be involved in sterility by regulating the secretion of reproductive hormones. This study suggested that gpr54a and gpr54b might function oppositely in regulating reproduction. In conclusion, these findings will aid in further investigating the functions of GPR54 and provide a theoretical basis for studying ACC sterility.
吻肽素受体(GPR54)是 G 蛋白偶联受体的一种,在调节繁殖方面发挥着核心作用。然而,对三倍体鱼类中 GPR54 的研究仍然有限。在这项研究中,我们报道了gpr54a和gpr54b在异源三倍体鲫鱼(ACC)和二倍体红鲫(Carassius auratus red var.)ACC和RCC中gpr54a的全长cDNA分别为2224 bp和2218 bp。qRT-PCR显示,ACC gpr54a和RCC gpr54a在大脑中的表达量较高,但在外周组织中的表达量较低。与 gpr54a 不同,ACC gpr54b 和 RCC gpr54b 在大脑、肝脏和肌肉中高表达。在繁殖季节,gpr54a在ACC中的表达量明显低于RCC,但在HPG轴中,gpr54b在ACC中的表达量明显高于RCC。这一发现表明,gpr54a可能促进卵巢发育,而gpr54b可能抑制卵巢发育。在繁殖季节,ISH表明ACC的卵巢发育异常,并在ACC和RCC的大脑、垂体和卵巢的多个区域发现了gpr54a和gpr54b的信号。大脑、垂体和卵巢的这些区域与生殖调节相关的几种激素的分泌有关。因此,我们假设 ACC 中较低表达的 gpr54a 和较高表达的 gpr54b 可能通过调节生殖激素的分泌参与了不育症的发生。这项研究表明,gpr54a 和 gpr54b 在调节生殖方面的功能可能是相反的。总之,这些发现将有助于进一步研究 GPR54 的功能,并为研究 ACC 不育症提供理论依据。
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引用次数: 0
Identification of key genes affecting development and nutrient metabolism in the early seedling stage of Dongting catfish (Silurus asotus) 洞庭鲇幼苗期发育和营养代谢关键基因的鉴定
Pub Date : 2024-09-05 DOI: 10.1016/j.repbre.2024.08.003
Yanfang Wu , Jiaxin Fu , Jixiang Chu , Jun Yan , Jun Xiao , Can Yang , Rui Song , Hao Feng

As a carnivorous fish, the cannibalism are prone to happen in the early seedling stage in Dongting catfish (Silurus asotus), especailly when there is not enough food, which resulting in the low survival rate of Dongting catfish. To find clues to improve the survival rate of Dongting catfish offspring, the comparative transcriptomics analysis were conducted between normal and malformed larval fish, as well as normal larval fish before and after first food intake. In normal and malformed larval fish groups, a total of 881 differential genes were identified, including 634 up-regulated genes and 247 down-regulated genes. From these genes related to growth hormone synthesis and secretion were screened out as SLA isoform X1, SOCS3, STAT1b, JUNB, respectively. In the group of larval fish before and after the first food intake, 4901 up-regulated genes and 3660 down-regulated genes were found, from which the differential genes related to protein digestion and absorption pathway and pancreatic secretion pathway were screened out as cathepsin D precursor, elastase 2 like precursor, elastase 2 precursor, LPL isoform X1, CTRB1 precursor, CTRL precursor, CPA precursor, FABP, SLC15A1, CEL tandem duplicate 2 precursor. The differential genes screened for association with amino acid metabolism were ASAOC precursor, PLD3, NDPKs, trehalase, UMP-CMP kinase, L-amino-acid oxidase, PLB1, FALDH isoform X2, PLA2 precursor, glucokinase. Meanwhile, nine differential genes were selected for qPCR verification. The results confirmed that the relative expression trends of these genes were consistent with those found in the transcriptome. These findings provide an important reference for developing strategies to enhance the survival rate of Dongting catfish at early seedling stage.

洞庭鲇是肉食性鱼类,在幼苗期,尤其是在食物不足的情况下,容易发生食人现象,导致洞庭鲇的成活率较低。为了找到提高洞庭鲶后代成活率的线索,研究人员对正常幼鱼和畸形幼鱼以及正常幼鱼在首次摄食前后的转录组学进行了比较分析。在正常幼鱼组和畸形幼鱼组中,共发现了 881 个差异基因,其中上调基因 634 个,下调基因 247 个。从中筛选出与生长激素合成和分泌相关的基因,分别为SLA同工酶X1、SOCS3、STAT1b和JUNB。在首次摄食前后的幼鱼组中,发现了 4901 个上调基因和 3660 个下调基因,从中筛选出与蛋白质消化吸收途径和胰腺分泌途径相关的差异基因,分别是 cathepsin D precursor、类弹性蛋白酶 2 前体、弹性蛋白酶 2 前体、LPL 同工型 X1、CTRB1 前体、CTRL 前体、CPA 前体、FABP、SLC15A1、CEL 串联重复 2 前体。筛选出的与氨基酸代谢相关的差异基因有:ASAOC前体、PLD3、NDPKs、trehalase、UMP-CMP激酶、L-氨基酸氧化酶、PLB1、FALDH同工酶X2、PLA2前体、葡萄糖激酶。同时,选择了 9 个差异基因进行 qPCR 验证。结果证实,这些基因的相对表达趋势与转录组中发现的趋势一致。这些发现为制定提高洞庭黄颡鱼幼苗期成活率的策略提供了重要参考。
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Reproduction and breeding
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