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1. 资产专用性和农户苹果经营代际传递意愿
ZHANG Qiang-qiang, GAO Xi-xi, Nazir Muhammad ABDULLAHI, WANG Yue, HUO Xue-xi
Journal of Integrative Agriculture    2023, 22 (8): 2553-2566.   DOI: 10.1016/j.jia.2023.04.016
摘要154)      PDF    收藏

在苹果产区农业人口老龄化与农村劳动力转移双重人口发展趋势下,“将来谁来种苹果”的问题凸显。由于中国实行以家庭联产承包责任制为特征的农业经营制度,苹果生产仍然以农户家庭经营为主,在苹果主产区农户农地流转比例较低的现实背景下,农户及其后代的苹果经营意愿对苹果可持续生产具有重要影响,因此,深入了解农户苹果经营代际传递意愿对分析苹果产区未来苹果产业发展形势、协调城镇化与苹果产业发展的关系、提升苹果可持续发展能力具有重要意义。该研究揭示了除了地理位置专用性的负向影响之外,人力资本专用性、实物资产专用性和土地资产专用性均会增强农户苹果经营代际传递意愿。损失厌恶在实物资产专用性、土地资产专用性和地理位置专用性对农户苹果经营代际传递意愿的影响中发挥部分中介作用。


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2. JIA-2022-0857 根区穴施通过减少潜在的氮损失和增加矿质氮的积累来提高玉米产量和氮利用
SHI Wen-xuan, ZHANG Qian, LI Lan-tao, TAN Jin-fang, XIE Ruo-han, WANG Yi-lun
Journal of Integrative Agriculture    2023, 22 (4): 1184-1198.   DOI: 10.1016/j.jia.2022.09.018
摘要248)      PDF    收藏

减少环境影响和提高氮利用率对确保中国的粮食安全至关重要。根区施肥已被认为是提高氮肥利用率(NUE)的有效策略,但在根区施肥条件下,控释尿素(CRU)与普通尿素掺混对夏玉米田的影响仍不清楚。因此,本研究进行了为期3年的田间试验,以不氮为对照,采用两种施肥模式(FF:人工开沟施,即农民施肥习惯HF:人工点播的根区穴施),每公顷施氮量210 kg hm-2(控释尿素普通尿素的混合比例为55),同时进行了一年的原位微试验。研究了不同施肥模式下的玉米产量、氮利用率和潜在氮损失。结果表明,FF相比HF处理在三年内使平均产量和氮素回收效率分别提高了8.522.3%相比之下HF具有更大的应用潜力,且显著提高了干物质积累、总氮吸收、SPAD值和LAI。此外,相比于FFHF使来自肥料的15N积累提高了17.2%15N的潜在损失减少了43.8%。收获时,HF处理FF增加了土壤耕层中矿质氮的积累,以便在下一季使用。因此,HF可以满足夏玉米对氮的需求,维持产量,提高NUE,同时减少环境中的氮损失。总的来说,根区穴施条件下控释尿素掺混普通尿素一种有效前景施肥模式有助于实现华北平原的环境完整性和粮食安全,值得进一步应用和研究。

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3. JIA-2022-0204 OsPPR9编码一个DYW类型PPR蛋白,影响多个叶绿体RNA编辑位点的编辑效率,对叶绿体发育至关重要
CHEN Chang-zhao, WANG Ya-Liang, HE Meng-xing, LI Zhi-wen, SHEN Lan, LI Qing, RE De-yong, HU Jiang, ZHU Li, ZHANG Guang-heng, GAO Zhen-yu, ZENG Da-li, GUO Long-biao, QIAN Qian, ZHANG Qiang
Journal of Integrative Agriculture    2023, 22 (4): 972-980.   DOI: 10.1016/j.jia.2022.08.026
摘要333)      PDF    收藏

叶片的光合作用主要发生在叶绿体中,叶绿体的发育受核基因编码蛋白调控。其中,PPR蛋白参与细胞器RNA编辑。在水稻中虽然鉴定出了约450PPR蛋白家族成员,但只有少数被证明影响水稻叶绿体RNA编辑。利用基因编辑技术创造了新的水稻种质资源和突变体,能够用于水稻育种和基因功能研究。本研究鉴定了一个DYW类型PPR蛋白OsPPR9在水稻叶绿体RNA编辑中的功能。通过CRISPR/Cas9基因编辑技术获得了Osppr9突变体,该突变体叶片黄化和致死表型;在突变体中,叶绿体发育相关基因表达量降低,光合作用相关蛋白的积累减少。此外,OsPPR9蛋白功能的缺失降低了叶绿体中rps8-C182, rpoC2-C4106, rps14-C80ndhB-C611 RNA编辑位点的编辑效率,影响水稻叶绿体的生长发育。OsPPR9在水稻叶片中表达量最高和编码一个定位于叶绿体PPR蛋白。此外,通过酵母双杂验证OsPPR9OsMORF2OsMORF9相互作用。总之,我们的研究为探明PPR蛋白在水稻叶绿体发育中的作用提供了线索。 

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4. JIA-2021-2226 同时检测CSFV、ASFV及APPV多重荧光PCR方法的建立及初步应用
SONG Xiang-peng, XIA Ying-ju, XU Lu, ZHAO Jun-jie, WANG Zhen, ZHAO Qi-zu, LIU Ye-bing, ZHANG Qian-yi, WANG Qin
Journal of Integrative Agriculture    2023, 22 (2): 559-567.   DOI: 10.1016/j.jia.2022.08.115
摘要211)      PDF    收藏

建立一种同时鉴别诊断猪瘟病毒(classical swine fever virus, CSFV)、非洲猪瘟病毒(African swine fever virus, ASF)和猪非典型瘟病毒(atypical porcine pestivirus, APPV的快速、灵敏、有效的检测方法。依据GenBank中登录的CSFV (5¢ UTR)ASFV (B646L) APPV (5¢ UTR) 的高度保守基因序列分别设计和优化多对特异性引物和Taq-man探针,以保守区基因序列分别制备三种阳性质粒,用矩阵法优化单重/多重荧光PCR的反应体系和条件,为避免荧光通道的交叉干扰多重荧光PCR扩增,结合所标记的荧光报告基团做颜色补偿试验,构建标准曲线的扩增图和对应的线性方程,并进行特异性、敏感性、重复性、符合性以及临床样本的检测等试验。三种病毒的标准曲线相关系数均达到0.995以上,具有良好的线性关系;与其它常见猪病无交叉扩增反应,具有很好的特异性;多重荧光PCR的最低检测量均为1 copy/mL,具有较高的敏感性;组内和组间的变异系数均小于1%,具有很好的重复性。该方法与CSF的国标(GB/T 27540-2011), ASF的国标 (GB/T 18648-2020),APPV的发明专利 (CN108611442A)检测样本盘的22个毒株样本符合率为100%。本研究建立的多重荧光PCR检测方法具有快速、高效、通量高、特异性好、灵敏度高等特点,可以对CSFVASFVAPPV病毒进行鉴别检测,为动物疫病的流行病学调查、疫情的检测提供一种新型的检测手段。本研究结合荧光PCR不同荧光通道设计CSFV、ASFV和APPV探针荧光信号强度较高且干扰较小的FAM、CY5HEX报告基团,建立多重荧光PCR检测方法用于同时鉴别诊断3种主要猪病毒的检测方法,在临床诊断中具有重要的应用价值

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5. 基于SNP发掘8672×科遗5214 DH群体中小麦粒重及其相关性状的QTL
HUANG Feng, LI Xuan-shuang, DU Xiao-yu, LI Shun-cheng, LI Nan-nan, LÜ Yong-jun, ZOU Shao-kui, ZHANG Qian, WANG Li-na, NI Zhong-fu, HAN Yu-lin, XING Jie-wen
Journal of Integrative Agriculture    2023, 22 (10): 2949-2960.   DOI: 10.1016/j.jia.2023.03.004
摘要312)      PDF    收藏

千粒重(TGW)、穗粒数(GNS)和穗粒重(GWS)是小麦产量的重要组成部分。为了解析其遗传学基础,我们构建了一个由8762/Keyi5214衍生的198个系组成的DH群体,利用基因芯片对该DH群体进行基因型鉴定,并将产量相关性状千粒重、穗粒数和穗粒重表型整合并进行QTL定位。最后,我们共获得18,942个多态性SNP标记,并鉴定出41个与这些性状相关的关键QTL。我们在染色体2D6A上鉴定出三个稳定的千粒重QTL (QTgw-2D.3, QTgw-2D.4, QTgw-6A.1),其增效等位基因均来自亲本8762,解释了4.81%-18.67%的表型变异。在染色体3D5B5D6A上鉴定出5个稳定的穗粒数QTL,其中QGns-5D.1来自亲本8762,其余4个来自亲本Keyi5214QTL解释了5.89-7.08%的表型变异。此外,还发现了一个稳定的小麦穗粒重遗传位点QGws-4A.3,该位点来自亲本8762,可解释6.08-6.14%的表型变异。为了应用鉴定到的QTL,我们为四个重要的QTL (Tgw2D.3-2, Tgw2D.4-1, Tgw6A.1 和 Gns3D.1)开发了STARP标记。本研究结果可为后期小麦千粒重、穗粒数和单穗重相关基因的鉴定和克隆奠定基础。

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6. JIA-2021-1102 漆酶基因StLAC6缺失导致玉米大斑病菌过氧化物酶体异常和药剂敏感性增加
LIU Ning, ZHANG Qian-qian, JIA Hui, ZHAO Bin, ZHU Zi-ping , CAO Zhi-yan, DONG Jin-gao
Journal of Integrative Agriculture    2022, 21 (7): 2019-2030.   DOI: 10.1016/S2095-3119(21)63855-8
摘要312)      PDF    收藏

前期研究表明,在玉米大斑病菌中存在9个漆酶样多铜氧化酶,其中漆酶基因StLAC2敲除导致黑色素含量降低,不能产生分生孢子,直接影响侵染能力。为进一步研究漆酶基因家族基因在生物学功能上的差异,本文利用同源重组技术创制StLAC6基因敲除突变体并对其对玉米大斑病菌生长发育、致病、杀菌剂抗性等方面的作用进行研究。结果表明通过同源重组技术成功创制了2株StLAC6基因敲除突变体,分析发现StLAC6基因缺失后对玉米大斑病菌的生长、菌丝形态和侵染能力没有显著影响,而且突变体细胞壁及细胞膜功能均正常。进一步对其超微结构进行分析发现,StLAC6基因敲除突变体菌丝中的过氧化物酶体形态异常,影响了菌丝内脂滴合成,同时敲除突变体中的酚类化合物和黑色素的合成增加。通过比较野生型和突变体的EC50值,发现StLAC6敲除导致病菌对嘧菌环胺、三环唑、吡唑醚菌酯等多种常见杀菌剂的敏感性增加,表明漆酶参与了玉米大斑病菌对杀菌剂的抗性。为了明确漆酶基因家族成员的关系,对StLAC6敲除突变体中其他漆酶基因的表达进行分析,发现StLAC1等多个玉米大斑病菌漆酶基因的表达水平发生了显着变化,说明漆酶基因家族成员间存在功能互补。本文为研究植物病原真菌中漆酶基因家族的功能和相互关系提供了新的见解


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7. Utilizing comprehensive decision analysis methods to determine an optimal planting pattern and nitrogen application for winter oilseed rape
DU Ya-dan, CUI Bing-jing, ZHANG Qian, SUN Jun, WANG Zhen, NIU Wen-quan
Journal of Integrative Agriculture    2020, 19 (9): 2229-2238.   DOI: 10.1016/S2095-3119(19)62870-4
摘要115)      PDF    收藏
Oilseed rape is one of the most important oil crops globally.  Attaining the appropriate cultivation method (planting pattern and nitrogen level) is necessary to achieve high yield, quality and resource utilization efficiency.  However, the optimal method for oilseed rape varies across countries and regions.  The objective of the present study was to determine an appropriate cultivation method, including planting pattern and nitrogen application, for winter oilseed rape in northwestern China.  Two planting patterns: ridge film mulching and furrow planting (RFMF) and flat planting (FP), and six nitrogen (N) amounts: 0 (N0), 60 (N60), 120 (N120), 180 (N180), 240 (N240), and 300 (N300) kg N ha–1 were applied across three growing seasons (2014–2017).  Three comprehensive decision analysis methods: principal component analysis, grey correlation degree analysis and the combined entropy weight and dynamic technique for order preference by similarity to ideal solution method were used to evaluate the growth and physiological indicators, nutrient uptake, yield, quality, evapotranspiration, and water use efficiency of winter oilseed rape.  Planting pattern, nitrogen amount and their interaction significantly affected the indicators aforementioned.  The RFMF pattern significantly increased all indicators over the FP pattern.  Application of N also markedly increased all the indicators except for seed oil content, but the yield, oil production and water use efficiency were decreased when N fertilizer exceeded 180 kg N ha–1 under FP and 240 kg N ha–1 under RFFM.  The evaluation results of the three comprehensive decision analysis methods indicated that RFMF planting pattern with 240 kg N ha–1 is an appropriate cultivation method for winter oilseed rape in northwestern China.  These findings are of vital significance to maximize yield, optimize quality and improve resource use efficiencies of winter oilseed rape.
 
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8. Multivariate analysis between meteorological factor and fruit quality of Fuji apple at different locations in China
ZHANG Qiang, ZHOU Bei-bei, LI Min-ji, WEI Qin-ping, HAN Zhen-hai
Journal of Integrative Agriculture    2018, 17 (06): 1338-1347.   DOI: 10.1016/S2095-3119(17)61826-4
摘要453)      PDF    收藏
China has the largest apple planting area and total yield in the world, and the Fuji apple is the major cultivar, accounting for more than 70% of apple planting acreage in China.  Apple qualities are affected by meteorological conditions, soil types, nutrient content of soil, and management practices.  Meteorological factors, such as light, temperature and moisture are key environmental conditions affecting apple quality that are difficult to regulate and control.  This study was performed to determine the effect of meteorological factors on the qualities of Fuji apple and to provide evidence for a reasonable regional layout and planting of Fuji apple in China.  Fruit samples of Fuji apple and meteorological data were investigated from 153 commercial Fuji apple orchards located in 51 counties of 11 regions in China from 2010 to 2011.  Partial least-squares regression and linear programming were used to analyze the effect model and impact weight of meteorological factors on fruit quality, to determine the major meteorological factors influencing fruit quality attributes, and to establish a regression equation to optimize meteorological factors for high-quality Fuji apples.  Results showed relationships between fruit quality attributes and meteorological factors among the various apple producing counties in China.  The mean, minimum, and maximum temperatures from April to October had the highest positive effects on fruit qualities in model effect loadings and weights, followed by the mean annual temperature and the sunshine percentage, the temperature difference between day and night, and the total precipitation for the same period.  In contrast, annual total precipitation and relative humidity from April to October had negative effects on fruit quality.  The meteorological factors exhibited distinct effects on the different fruit quality attributes.  Soluble solid content was affected from the high to the low row preface by annual total precipitation, the minimum temperature from April to October, the mean temperature from April to October, the temperature difference between day and night, and the mean annual temperature.  The regression equation showed that the optimum meteorological factors on fruit quality were the mean annual temperature of 5.5–18°C and the annual total precipitation of 602–1 121 mm for the whole year, and the mean temperature of 13.3–19.6°C, the minimum temperature of 7.8–18.5°C, the maximum temperature of 19.5°C, the temperature difference of 13.7°C between day and night, the total precipitation of 227 mm, the relative humidity of 57.5–84.0%, and the sunshine percentage of 36.5–70.0% during the growing period (from April to October).
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9. Characterization of salt tolerance and Fusarium wilt resistance of a sweetpotato mutant
ZHANG Huan, ZHANG Qian, WANG Yan-nan, LI Yan, ZHAI Hong, LIU Qing-chang, HE Shao-zhen
Journal of Integrative Agriculture    2017, 16 (09): 1946-1955.   DOI: 10.1016/S2095-3119(16)61519-8
摘要720)      PDF    收藏
   The variant LM1 was previously obtained using embryogenic cell suspension cultures of sweetpotato variety Lizixiang by gamma-ray induced mutation, and then its characteristics were stably inherited through six clonal generations, thus this mutant was named LM1. In this study, systematic characterization of salt tolerance and Fusarium wilt resistance were performed between Lizixiang and mutant LM1. LM1 exhibited significantly higher salt tolerance compared to Lizixiang. The content of proline and activities of superoxide dismutase (SOD) and photosynthesis were significantly increased, while malonaldehyde (MDA) and H2O2 contents were significantly decreased compared to that of Lizixiang under salt stress. The inoculation test with Fusarium wilt showed that its Fusarium wilt resistance was also improved. The lignin, total phenolic, jasmonic acid (JA) contents and SOD activity were significantly higher, while H2O2 content was significantly lower in LM1 than that in Lizixiang. The expression level of salt stress-responsive and disease resistance-related genes was significantly higher in LM1 than that in Lizixiang under salt and Fusarium wilt stresses, respectively. This result provides a novel and valuable material for improving the salt tolerance and Fusarium wilt resistance of sweetpotato.
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10. Mapping of the heading date gene HdAey2280 in Aegilops tauschii
LIU Guo-xiang, ZHANG Li-chao, XIA Chuan, JIA Ji-zeng, ZHANG Jun-cheng, ZHANG Qiang, DONG Chun-hao, KONG Xiu-ying, LIU Xu
Journal of Integrative Agriculture    2016, 15 (12): 2719-2725.   DOI: 10.1016/S2095-3119(15)61291-6
摘要1016)      PDF    收藏
    An optimum heading date is essential for sustainable crop productivity and ensuring high yields. In the present study, F2:3 populations were generated by crossing an early-heading accession, Y2280, with a late-heading accession, Y2282. The heading dates of the F2 and F3 populations were investigated in a field study. Using publicly available simple sequence repeat (SSR) markers, the early heading date gene HdAey2280 was mapped onto Aegilops tauschii chromosome 7DS between the flanking markers wmc438 and barc126 at distances of 15 and 9.1 cM, respectively. Further analysis indicated that HdAey2280 is a novel heading date gene. New SSR markers were developed based on the Ae. tauschii draft genome sequence, resulting in four new markers that were linked to the heading date gene HdAey2280. The closest distance of these markers was 1.9 cM away from the gene. The results collected in this study will serve as a framework for map-based cloning and marker-assisted selection in wheat breeding programs in the future.
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11. Dwarfing apple rootstock responses to elevated temperatures: A study on plant physiological features and transcription level of related genes
ZHOU Bei-bei, SUN Jian, LIU Song-zhong, JIN Wan-mei, ZHANG Qiang, WEI Qin-ping
Journal of Integrative Agriculture    2016, 15 (05): 1025-1033.   DOI: 10.1016/S2095-3119(15)61298-9
摘要1247)      PDF    收藏
  The aim of this study was to investigate the impact of heat stress on physiological features, together with endogenous hormones and the transcription level of related genes, to estimate the heat resistance ability and stress injury mechanism of different dwarfig apple rootstocks. Among the six rootstocks, the rootstocks of native Shao series (SH series) showed better heat stress resistance than those of Budagovski 9 (B9), Cornell-Geneva 24 (CG24), and Malling 26 (M26) from abroad. Among SH series rootstocks, SH1 and SH6 showed higher heat stress resistance than SH40. M26 demonstrated the lowest adaption ability to heat stress, showing higher leaf conductivity and lower liquid water content (LWC) with the increase in temperature. Heat stress also resulted in the suppression of photosynthesis, which showed no signifiant restoration after 7-day recovery. It should be noted that although a higher temperature led to a lower LWC and photosynthetic effiiency (Pn ) of CG24, there was no signifiant increase in leaf conductivity, and 7 days after the treatment, the Pn of CG24 recovered. The extremely high temperature tolerance of SH series rootstocks could be related to the greater osmotic adjustment (OA), which was reflcted by smaller reductions in leaf relative water content (RWC) and higher turgor potentials and leaf gas exchange compared with the other rootstocks. Determination of hormones indicated multivariate regulation, and it is presumed that a relatively stable expression levels of functional genes under high-temperature stress is necessary for heat stress resistance of rootstocks
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12. Influence of gallic acid on porcine neutrophils phosphodiesterase 4, IL-6, TNF-α and rat arthritis model
JIANG Dai-xun, ZHANG Mei-hua, ZHANG Qian, CHEN Yi-shan, MA Wen-jing, WU Wei-peng, MU Xiang
Journal of Integrative Agriculture    2015, 14 (4): 758-764.   DOI: 10.1016/S2095-3119(14)60824-8
摘要1910)      PDF    收藏
Our previous studies showed that the anti-inflammatory effects of Paeonia lactiflora roots extract may be mediated, at least in part, through its gallic acid content, and this effect may be regulated in part by an inhibition on cAMP-phosphodiesterase (PDE). To explore the anti-inflammatory effect and mechanism, the influence of gallic acid on neutrophils PDE4 activity and expression, TNF-α and IL-6 content and rat arthritis model were further studied. PDE4 activity and gene express were calculated respectively by substrate cAMP change examined with HPLC and real-time RT-PCR. The concentration of IL-6 and TNF-α in supernatant were assayed by ELISA method. Model of rat arthritis was caused by complete Freund’s adjuvant. Results showed that gallic acid had a dose-dependent restraint on PDE4 activity of neutrophils in vitro, promoted significantly PDE4A expression (P<0.01), and had no influence on the expressions of PDE4B and 4D. However, PDE4C expression was not detected. Gallic acid could promote IL-6 release (P<0.05), and inhibit TNF-α release of neutrophils (P<0.05). The experiment in vivo showed that gallic acid had obvious restraint on local inflammation of animal model (P<0.05). Therefore, the anti-inflammatory effect of gallic acid may be mediated in part through an inhibition on PDE4 activity and further an increase of IL-6 and a decrease of TNF-α of neutrophils, and this effect seemed to have no relationship with PDE4 expression.
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13. Toxicity and binding analyses of Bacillus thuringiensis toxin Vip3A in Cry1Ac-resistant and -susceptible strains of Helicoverpa armigera (Hübner)
ZHANG Qian, CHEN Li-zhen, LU Qiong, ZHANG Yan, LIANG Ge-mei
Journal of Integrative Agriculture    2015, 14 (2): 347-354.   DOI: 10.1016/S2095-3119(14)60770-X
摘要2171)      PDF    收藏
The Bacillus thuringiensis vegetative insecticidal protein, Vip3A, represents a new family of Bt toxin and is currently applied to commercial transgenic cotton. To determine whether the Cry1Ac-resistant Helicoverpa armigera is cross-resistant to Vip3Aa protein, insecticidal activities, proteolytic activations and binding properties of Vip3Aa toxin were investigated using Cry1Ac-susceptible (96S) and Cry1Ac-resistant H. armigera strain (Cry1Ac-R). The toxicity of Vip3Aa in Cry1Ac-R slightly reduced compared with 96S, the resistance ratio was only 1.7-fold. The digestion rate of full-length Vip3Aa by gut juice extracts from 96S was little faster than that from Cry1Ac-R. Surface plasmon resonance (SPR) showed there was no significant difference between the binding affinity of Vip3Aa and BBMVs between 96S and Cry1Ac-R strains, and there was no significant competitive binding between Vip3Aa and Cry1Ac in susceptible or resistant strains. So there had little cross-resistance between Vip3Aa and Cry1Ac,Vip3A+Cry proteins maybe the suitable pyramid strategy to control H. armigera in China in the future.
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14. Effect of Partial Root-Zone Irrigating Deuterium Oxide on the Properties of Water Transportation and Distribution in Young Apple Trees
LIU Song-zhong, ZHANG Qiang, LIU Jun, SUN Jian , WEI Qin-ping
Journal of Integrative Agriculture    2014, 13 (6): 1268-1275.   DOI: 10.1016/S2095-3119(13)60623-1
摘要1940)      PDF    收藏
Partial root-zone irrigation (PRI) has been proved to be an optimal water-saving irrigation technology, however, few studies were done on water transportation and distribution under PRI. The present study was performed to investigate the water transportation and distribution among the wet and dry root-zones and the shoot using deuterium water (D2O) in 1/4 root-zone PRI experiment. It also aimed to determine and analyze the D2O relative abundance within different types of roots and shoots. The results indicated that water could be transported from roots in wet root-zone to roots in dry root-zone and shoots within 2 h after irrigation. Water transportation in roots of wet-zone was carried out by absorbing root, 1-2 mm root, 2-5 mm root, and >5 mm root progressively, while through a reverse process in three dry root-zones. In shoots, water was transported to trunk, central trunk, annual branches, shoot and leaf progressively. Thus in the young apple trees subjected to PRI, water was distributed first in the roots, including the roots in the wet and dry root-zones, to satisfy the water need of roots itself, and then transported to the shoot within hours of irrigation.
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15. Overexpression of a Cytosolic Ascorbate Peroxidase Gene, OsAPX2, Increases Salt Tolerance in Transgenic Alfalfa
ZHANG Qian, MA Cui, XUE Xin, XU Ming, LI Jing , WU Jin-xia
Journal of Integrative Agriculture    2014, 13 (11): 2500-2507.   DOI: 10.1016/S2095-3119(13)60691-7
摘要1061)      PDF    收藏
Alfalfa (Medicago sativa L.) is an important forage crop in the world and it is of great significance for the improvement of its salt tolerance. To improve salt tolerance in alfalfa, a rice ascorbate peroxidase gene (OsAPX2) was introduced into alfalfa using Agrobacterium tumefaciens-mediated transformation with marker gene bar. The different T-DNA insertions in T1 transgenic alfalfa were identified by Southern hybridization. Three independent T2 transgenic lines were selected for stress analysis and the results showed that all of them were salt tolerant compared with wild-type plants. The transgenic plants had low levels of H2O2, malondialdehyde and relative electrical conductivity under salt and drought stresses. Moreover, the contents of chlorophyll and proline, and APX activity were high in transgenic plants under salt and drought stresses. Taken together, the overexpression of OsAPX2 enhances salt tolerance in alfalfa through scavenging reactive oxygen species.
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16. Fine Mapping of qTGW3-1, a QTL for 1000-Grain Weight on Chromosome 3 in Rice
ZHANG Qiang, YAO Guo-xin, HU Guang-long, TANG Bo, ZHANG Hong-liang, LI Zi-chao
Journal of Integrative Agriculture    2012, 12 (6): 879-887.   DOI: 10.1016/S1671-2927(00)8610
摘要1805)      PDF    收藏
The QTL qTGW3-1 was located on chromosome 3 of rice (Oryza sativa L.) and associated with the 1 000-grain weight (TGW) according to the result of our earlier study. With the objective of fine mapping of this locus, we developed a F2 population consisting of 3 428 plants derived from the cross between TGW-related near isogenic line DL017 (BC3F4 generation of GSL156×Nipponbare) and the recurrent parent Nipponbare. Using six microsatellites, this QTL was delimited between RM5477 and RM6417. Markers MM1455 and MM1456 within this region were used for further mapping of this QTL. Finally, qTGW3-1 was fine-mapped into a 89-kb interval between RM5477 and MM1456, which locates in the BAC clone AC107226 harboring five putative candidate genes.
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17. Scarabaeid Larvae- and Herbicide-Resistant Transgenic Perennial Ryegrass (Lolium perenne L.) Obtained by Agrobacterium tumefaciens-Mediated Transformation of cry8Ca2, cry8Ga and bar Genes
WU Jin-xia, ZHANG Zhi-guo, ZHANG Qian, LANG Zhi-hong , SUN Xue-hui
Journal of Integrative Agriculture    2012, 12 (1): 53-61.   DOI: 10.1016/S1671-2927(00)8528
摘要1541)      PDF    收藏
Insect pest and weeds are two major problems for forage and turf grasses. In this study, scarab larvae- and herbicideresistant transgenic perennial ryegrass (Lolium perenne L.) was obtained by transforming it with cry and bar genes simultaneously via the Agrobacterium-mediated method. To optimize the callus induction and plant regeneration conditions, various concentrations of 2,4-dichlorophenoxyacetic acid and 6-benzylaminopurine were assayed. The transformation efficiencies of different Agrobacterium suspension media, used during Agrobacterium-mediated transformation, were compared. Then, plasmids of pCAMBIA3301 containing cry gene (cry8Ca2 or cry8Ga) and bar gene, driven by ubiquitin promoter, were transformed into perennial ryegrass. The transformants were generated and confirmed by both Southern hybridization analysis and Western hybridization analysis. Further, the resistance of transgenic perennial ryegrass plants to scarab larvae and herbicide were analyzed. After 30 d of co-cultivation with scarab larvae, the damage to the root system of transgenic plants was less than that of non-transgenic control plants. Additionally, the leaves of transgenic plants were resistant to Basta®, while leaves of the wild plants wilted after Basta® spraying. These results show that cry gene and bar gene were successfully transferred into perennial ryegrass by the Agrobactgerium-mediated method, and convey resistance to scarab larvae and herbicide in transgenic perennial ryegrass plants.
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18. A MicroRNA Catalog of Swine Umbilical Vein Endothelial Cells Identified by Deep Sequencing
DAI Chen, ZHANG Yan-ming, ZHANG Qian, WU Zong-song, DENG Wen, ZHANG Xu, GUO Kang-kang, TANG Qing-hai , HOU Bo
Journal of Integrative Agriculture    2011, 10 (9): 1467-1474.   DOI: 10.1016/S1671-2927(11)60140-5
摘要1876)      PDF    收藏
MicroRNAs (miRNAs) are endogenous ~22 nt RNAs that play important regulatory roles in targeting mRNAs for cleavageor translational repression. Despite the discovery of increasing numbers of human and mouse miRNAs, little is knownabout miRNAs from pig. In this study, we sought to extend the repertoire of porcine small regulatory RNAs using Solexasequencing. We sequenced a library of small RNAs prepared from immortalized swine umbilical vein endothelial cells(SUVECs). We produced over 13.6 million short sequence reads, of which 8 547 658 perfectly mapped to the pig genome.A bioinformatics pipeline was used to identify authentic mature miRNA sequences. We identified 154 porcine miRNAgenes, among which 146 were conserved across species, and 8 were pig-specific miRNA genes. The 146 miRNA genesencoded 116 conserved mature miRNAs and 66 miRNA*. The 8 pig-specific miRNA genes encoded 4 mature miRNAs.Four potential novel miRNAs were identified. The secondary structures of the 154 miRNA genes were predicted; 13miRNAs have 2 structures, and miR-9 and miR-199 have 4 and 3 structures, respectively. 36 miRNAs were organized into19 compact clusters. miR-206, miR-21 and miR-378 were the relatively highly expressed miRNAs. In conclusion, Solexasequencing allowed the successful discovery of known and novel porcine miRNAs with high accuracy and efficiency.Furthermore, our results supply new data to the somewhat insufficient pig miRBase, and are useful for investigatingfeatures of the blood-brain barrier, vascular diseases and inflammation.
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