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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-2022-0204 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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3. 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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4. 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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5. 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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6. 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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7. 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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