川西北地区上二叠统吴家坪组凝灰岩分布地震预测     

徐敏  臧殿光  江娜  徐宝亮  郑虹  龚立  杨晋蓉 《长江大学学报》2021,18(3):21-28

通过对川西北地区的老井进行复查,发现多口井在上二叠统吴家坪组存在大套的凝灰岩,对上述井的地质、测井、地震资料综合分析发现,凝灰岩的岩性以凝灰质泥岩、凝灰质粉砂岩、凝灰质灰岩、沉凝灰岩、凝灰岩、凝灰质白云岩为主,次生溶蚀孔隙发育;凝灰岩在测井曲线和地震剖面上均有明显的响应特征:在测井曲线上表现为明显的低纵波速度、高自然伽马特征,凝灰岩底界在地震剖面上均表现为波峰反射特征.为此,采用模型正演分析技术及波阻抗反演技术,首次对四川盆地川西北地区晚二叠世吴家坪组凝灰岩的分布进行了地震预测:双鱼石构造-剑阁区块的北部地区凝灰岩分布最厚,南部减薄;双鱼石构造东部凝灰岩分布较厚,西部减薄,直至不发育.研究结果表明,晚二叠世吴家坪组在川西北地区沉积了一套凝灰岩,从西北至东南方向减薄;由于凝灰岩物性好,孔隙度高,可成为四川盆地火山岩气藏勘探全新的后备领域,为川西北地区下一步新的勘探领域开发提供了重要研究基础.  相似文献   

Three SNPs within exons of INHA and ACVR2B genes are significantly associated with litter size in Dazu black goats     

Shi-Zhi Wang  Guang-Xin E  Yan Zeng  Yan-Guo Han  Yong-Fu Huang  Ri-Su Na 《Reproduction in domestic animals》2021,56(6):936-941

The aim of this study was to analyse the association between single-nucleotide polymorphisms within INHA and ACVR2B and litter size in Dazu black goats. In total, twenty-two SNPs were genotyped in 190 individuals by SNaPshot and resequencing. The results showed that three SNPs (SNP_1, SNP_12 and SNP_13 in this study) were detected to have significant additive genetic effect on the recorded goat litter size (p < .05). The SNP_1 (NC_030809.1), a non-synonymous substitution of G for T at chr2-g. 28314990 in the exon 2 of INHA gene (NM_001285606.1), resulted in homozygote 2 (HOM2) contributed 0.25 and heterozygote (HET) contributed 0.12 larger litter than homozygote 1 (HOM1). Meanwhile, SNP_12 (Chr22-g. 11721225 A > T) and SNP_13 (Chr22-g. 11721227 A > C) (NC_030829.1) simultaneously mutated at the first and third position of a triplet AAA (lysine, K) in the exon 4 of ACVR2B gene (XM_018066623.1) had estimated genetic effects of HOM1 (0.00) and HOM2 (0.03) larger than HET (−0.12). In conclusion, one SNPs (chr2-g. 28314990 T > G) within the exon 2 of INHA and two SNPs (Chr22-g. 11721225 A > T and Chr22-g. 11721227 A > C) i n the exon 4 of ACVR2B gene were highly recommended as candidate markers of litter size in Dazu black goats. A large-scale association study to assess the impact of these variants on litter size is still necessary.  相似文献   

施用锌肥和遮阴互作对花生生长发育、抗病性及产量的影响   总被引：1，自引：0，他引：1  

司贤宗  张翔  索炎炎  毛家伟  李亮  余琼  王亚宁  李国平  余辉 《中国油料作物学报》2018,40(3):399

采用大田裂区试验，研究了施用锌肥和不同遮阴程度互作对花生生长发育、抗病性及产量的影响。结果表明，与不施锌肥相比，施用锌肥能提高花生不同部位锌含量、增加叶片SPAD值，提高花生叶片中可溶性糖、蛋白质和生长素含量，减少花生病害的发生，平均降低7.1个百分点，花生产量平均增加19.4%。相同施锌水平下，随着遮阴程度的增加，花生不同部位锌的含量和不同生育期叶片SPAD值以及花生叶片中可溶性糖、蛋白质和生长素含量呈增加趋势，花生的发病率比不遮阴对照增加4.8、10.2个百分点，花生产量平均降低16.5%、10.0%。在30%、70%的遮阴条件下，施用锌肥的花生产量比不施锌的分别提高21.1%、25.0%。本试验条件下，施用七水硫酸锌30 kg/hm2，使花生具有较强的抗低温寡照能力及抗病性能，增产显著，可在花生产区推广应用。  相似文献   

秀珍菇原基形成相关基因PpFBD1的克隆与表达研究     

王伟科  宋吉玲  陆娜  袁卫东  闫静  陈观平 《浙江农业学报》2020,32(1):93

前期研究中通过对秀珍菇经低温诱导后不同发育阶段样本进行转录组测序及差异表达基因分析发现,ID为Cluster-6377.64510的基因(命名为PpFBD1)在原基形成前期的样本中高表达。为进一步了解分析其表达特性及功能,根据转录组测序结果设计特异性引物,利用RT-PCR技术从秀珍菇中克隆获得了该基因的cDNA全长。该基因由342个核苷酸组成,编码一个由113个氨基酸组成的蛋白,蛋白相对分子质量约11 ku。进化树分析显示,PpFBD1编码蛋白与糙皮侧耳hydrophobin1编码的疏水蛋白亲缘关系最近。Gene Ontology功能分析表明,PpFBD1主要参与真菌类细胞壁的合成。荧光定量RT-PCR检测显示,该基因在菌丝体经低温诱导后恢复至室温阶段(原基形成前期)表达量最高,这表明其可能参与调控秀珍菇原基形成过程。本研究结果为阐明秀珍菇原基形成机制提供参考。  相似文献   

Effect of chlorogenic acid on intestinal inflammation,antioxidant status,and microbial community of young hens challenged with acute heat stress     

Fang Chen  Hao Zhang  Na Zhao  Xuehai Yang  Encun Du  Shaowen Huang  Wanzheng Guo  Wei Zhang  Jintao Wei 《Animal Science Journal》2021,92(1):e13619

Heat stress in poultry is deleterious to productive performance. Chlorogenic acid (CGA) exerts antibacterial, anti-inflammatory, and antioxidant properties. This study was conducted to evaluate the effects of dietary supplemental CGA on the intestinal health and cecal microbiota composition of young hens challenged with acute heat stress. 100-day-old Hy-line brown pullets were randomly divided into four groups. The control group (C) and heat stress group (HS) received a basal diet. HS + CGA₃₀₀ group and HS + CGA₆₀₀ group received a basal diet supplemented with 300- and 600-mg/kg CGA, respectively, for 2 weeks before heat stress exposure. Pullets of HS, HS + CGA₃₀₀, and HS + CGA₆₀₀ group were exposed to 38°C for 4 h while the control group was maintained at 25°C. In this study, dietary CGA supplementation had effect on mitigate the decreased T-AOC and T-SOD activities and the increasing of IL-1β and TNFα induced by acute heat stress. Dietary supplementation with 600 mg/kg CGA had better effect on increasing the relative abundance of beneficial bacterial genera, such as Rikenellaceae RC9_gut_group, Ruminococcaceae UCG-005, and Christensenellaceae R-7_group, and deceasing bacteria genera involved in inflammation, such as Sutterella species. Therefore, CGA can ameliorate acute heat stress damage through suppressing inflammation and improved antioxidant capacity and cecal microbiota composition.  相似文献   

浅谈种子质量保证     

刘娜 《农业科技通讯》2006,(12):14-14

随着种子市场的规范化、商品化程度的提高,种子质量意识的大大增强,建立健全种子质量保障制度,全面保证种子质量,确保农民增产,农民增收势在必行。1质量就是生命对于种子这一特殊商品来说更是至关重要的,只有保障种子质量,才能使种子行业长久不衰。企业不能为了片面追求经济效益,生产经营伪劣种子,这样不仅降低了种子公司的信誉,而且给农民造成了经济损失。2要严格按照规程操作,严把质量关在种子生产过程中,确保亲本种子质量,尤其是纯度。应及时解决制种过程中花期不遇,制种产量低的技术难题,并认真开展种子田间检验及室内检验,确保种子的纯…  相似文献   

稀土对阿尔巴斯白绒山羊瘤胃发酵,消化代谢及其生产性能的影响   总被引：5，自引：0，他引：5  

桂荣  刘少卿 《畜牧兽医学报》1995,26(6):515-521

实验１用４只安装永久性瘤胃漏管的阿尔巴斯白绒山羊（母），进行瘤胃消化代谢试验；实验２用６只成年母绒山羊进行消化代谢试验；试验３选用同品种成年妊娠母羊进行放牧补饲实验。实验１得出，稀土的使用可促进瘤胃内ＮＨ３－Ｎ的利用；细菌数比对照组提高３５．６７％；丙酸产量提高２８．６３％。实验２得出，稀土可提高绒山羊日粮ＤＭ、ＯＭ、ＧＥ及ＡＤＦ消化率，分别为１１．５８％、１２．２７％、１６．６９％和２６．２９％；每日氮存留率比对照组提高１８０．１％。实验３得出，稀土组产绒量比对照组提高８．９０％。  相似文献   

大骨鸡中MSTN基因表达规律性的研究   总被引：2，自引：0，他引：2  

胡兰  郭东新  胡锐  刘梅  王娜  栾新红 《猪业科学》2003,20(11):42-44

本实验以大骨鸡为试材,采用RT-PCR法检测了MSTN基因在大骨鸡不同器官、不同时间的表达情况,结果表明MSTN基因在骨骼肌中表达水平较高,在心肌、肾脏、脑、肠、舌中也有微量表达,但在肺、肝脏中未检测出MSTNmRNA,而且在14日龄时表达水平明显低于35日龄和56日龄,而且在孵化后一周时胸肌中MSTN基因的表达水平达到最低。  相似文献   

青海湖地区植物中常量营养元素含量特征   总被引：3，自引：1，他引：2  

李天才  陈桂琛  索有瑞 《草业科学》2001,18(1):27-29

以青海湖地区各类植被中采集的46种主要植物样品，进行6种常量营养元素的分析测试，得到了区内主要植物常量营养元素的一些特征。为青海湖地区生态环境研究、草原建设、畜牧业发展等提供一些基础资料。  相似文献   

Study of Resistance to Orobanche ramosa in Host (Oilseed Rape and Carrot) and Non-host (Maize) Plants     

Naïma Zehhar  Pascal Labrousse  Marie-Claire Arnaud  Christian Boulet  Driss Bouya  André Fer 《European journal of plant pathology / European Foundation for Plant Pathology》2003,109(1):75-82

Orobanche ramosa is a parasitic Angiosperm responsible for severe yield losses in several economical crops. It is a serious threat in oilseed rape in France and Morocco and is appearing in carrot crops in Morocco. In this study, several varieties of oilseed rape and carrot were screened in order to identify resistant cultivars and to characterize the resistance mechanisms involved. All the 15 oilseed rape varieties tested were susceptible. In carrot, the varieties 'Colmar à coeur rouge' and 'Nantaise demi-longue' were susceptible, whereas 'Palaiseau' and 'Buror' were resistant. In the susceptible 'Colmar à coeur rouge' carrot no defence reactions were found and the development of the parasite inhibited carrot tap root formation. In the resistant carrot varieties, the parasite germinated, became attached to the host root but became necrotic before emergence. In 'Buror' carrot, formation of a mechanical barrier was associated with the restriction to the cortex of the parasite. In maize cv. 'Vigni', a non-host of O. ramosa, thickening of xylem vessels, cell divisions in the central cylinder and formation of an encapsulation layer were observed in association with restricted development of Orobanche haustoria.  相似文献