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Combined linkage and association mapping reveals two major QTL for stripe rust adult plant resistance in Shaanmai 155 and their haplotype variation in common wheat germplasm

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The crop Journal 2022年第3期10卷 783-792页

作者： Cai’e Zhou Dan Liu Xu Zhang Qimeng Wu Shengjie Liu Qingdong Zeng Qilin Wang Changfa Wang Chunlian Li Ravi PSingh Sridhar Bhavani Zhensheng Kang Dejun Han Weijun Zheng Jianhui Wu state key laboratory of crop stress biology for arid areas College of AgronomyNorthwest A&F UniversityYangling 712100ShaanxiChina state key laboratory of crop stress biology for arid areas College of Plant ProtectionNorthwest A&F UniversityYangling 712100ShaanxiChina International Maize and Wheat Improvement Center(CIMMYT) El BatanTexcocoEstado de Mexico 56237Mexico

The development and deployment of diverse resistance sources in new wheat cultivars underpin the durable control of stripe *** the present study,two loci for adult plant resistance(APR),QYr SM155.1 and QYr SM155.2,were identified in the Chinese wheat breeding line Shaanmai *** SM155.1 was mapped to a 3.0-c M interval between the single-nucleotide polymorphism(SNP)markers AX-109583610 and AX-110907562 on chromosome arm 2 *** SM155.2 was mapped to a 2.1-c M interval flanked by the SNP markers AX-110378556 and AX-86173526 on chromosome arm 7 AS.A genome-wide association study was used to identify markers associated with APR in a panel of 411 spring wheat *** and 11 SNPs were significantly associated with QYr SM155.1 and QYr SM155.2,respectively,corresponding to physical intervals of 653.75–655.52 Mb on 2 BL and 81.63–83.93 Mb on7 *** characterize the haplotype variation and the distribution of these QTL,haplotype analysis was performed based on these SNPs in an independent panel of 1101 worldwide wheat *** major haplotypes(2 B_h1,2 B_h2,and 2 B_h3)for QYr SM155.1 and four major haplotypes(7 A_h1,7 A_h2,7 A_h3,and 7 A_h4)for QYr SM155.2 were *** individually harboring QYr SM155.1_h1 and QYr SM155.2_h1 haplotypes and their combination displayed *** assays of 1306 current Chinese cultivars and breeding lines using markers flanking QYr SM155.1 and QYr SM155.2 indicated that the resistance haplotypes of the two QTL were present in respectively 1.45%and 14.16%of *** resistance haplotype frequencies at these two loci using marker-assisted selection should benefit wheat production in China.

关键词： Linkage and association mapping Stripe rust resistance QYr SM155.1 QYr SM155.2 Haplotype variation

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MdATG18a overexpression improves basal thermotolerance in transgenic apple by decreasing damage to chloroplasts

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Horticulture Research 2020年第1期7卷 2418-2432页

作者： Liuqing Huo Xun Sun Zijian Guo Xin Jia Runmin Che Yiming Sun Yanfei Zhu Ping Wang Xiaoqing Gong Fengwang Ma state key laboratory of crop stress biology for arid areas/shaanxi key laboratory of apple College of HorticultureNorthwest A&F UniversityYangling 712100 ShaanxiChina Center of Pear Engineering Technology Research State Key Laboratory of Crop Genetics and Germplasm EnhancementCollege of HorticultureNanjing Agricultural UniversityNanjing 210095China

High temperature is an abiotic stress factor that threatens plant growth and *** in response to heat stress involves the selective removal of heat-induced protein ***,we showed that a crucial autophagy protein from apple,MdATG18a,has a positive effect on drought *** the present study,we treated transgenic apple(Malus domestica)plants overexpressing MdATG18a with high temperature and found that autophagy protected them from heat *** of MdATG18a in apple enhanced antioxidase activity and contributed to the production of increased beneficial antioxidants under heat *** apple plants exhibited higher photosynthetic capacity,as shown by the rate of CO_(2) assimilation,the maximum photochemical efficiency of photosystem II(PSII),the effective quantum yield,and the electron transport rates in photosystems I and II(PSI and PSII,respectively).We also detected elevated autophagic activity and reduced damage to chloroplasts in transgenic plants compared to WT *** addition,the transcriptional activities of several HSP genes were increased in transgenic apple *** summary,we propose that autophagy plays a critical role in basal thermotolerance in apple,primarily through a combination of enhanced antioxidant activity and reduced chloroplast damage.

关键词： damage decreasing protected

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Overexpression of MdATG8i improves water use efficiency in transgenic apple by modulating photosynthesis, osmotic balance, and autophagic activity under moderate water deficit

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Horticulture Research 2021年第1期8卷 855-869页

作者： Xin Jia Ke Mao Ping Wang Yu Wang Xumei Jia Liuqing Huo Xun Sun Runmin Che Xiaoqing Gong Fengwang Ma state key laboratory of crop stress biology for arid areas/shaanxi key laboratory of apple College of HorticultureNorthwest A&F University712100 YanglingShaanxiChina Center of Pear Engineering Technology Research State Key Laboratory of Crop Genetics and Germplasm EnhancementCollege of HorticultureNanjing Agricultural University210095 NanjingChina

Water deficit is one of the major limiting factors for apple(Malus domestica)production on the Loess Plateau,a major apple cultivation area in *** identification of genes related to the regulation of water use efficiency(WUE)is a crucial aspect of crop breeding *** a conserved degradation and recycling mechanism in eukaryotes,autophagy has been reported to participate in various stress ***,the relationship between autophagy and WUE regulation has not been *** have shown that a crucial autophagy protein in apple,MdATG8i,plays a role in improving salt ***,we explored its biological function in response to long-term moderate drought *** results showed that MdATG8i-overexpressing(MdATG8i-OE)apple plants exhibited higher WUE than wild-type(WT)plants under long-term moderate drought *** WUE can be increased by improving photosynthetic *** plays a critical role in plant stress resistance and *** long-term drought conditions,the photosynthetic capacity and accumulation of sugar and amino acids were higher in MdATG8i-OE plants than in WT *** increased photosynthetic capacity in the OE plants could be attributed to their ability to maintain optimal stomatal aperture,organized chloroplasts,and strong antioxidant ***8i overexpression also promoted autophagic activity,which was likely related to the changes described *** summary,our results demonstrate that MdATG8i-OE apple lines exhibited higher WUE than WT under long-term moderate drought conditions because they maintained robust photosynthesis,effective osmotic adjustment processes,and strong autophagic activity.

关键词： breeding drought apple

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Highly efficient,genotype-independent transformation and gene editing in watermelon(Citrullus lanatus)using a chimeric ClGRF4-GIF1 gene

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Journal of Integrative Plant biology 2021年第12期63卷 2038-2042页

作者： Qin Feng Ling Xiao Yizhen He Man Liu Jiafa Wang Shujuan Tian Xian Zhang Li Yuan state key laboratory of crop stress biology for arid areas Col ege of HorticultureNorthwest A&F UniversityYangling712100China

Efficient genetic transformation has the potential to advance research and breeding in watermelon(Citrullus lanatus),but regeneration from tissue culture remains *** work showed that expressing a fusion of two interacting transcription factors,GROWTH-REGULATING FACTOR4(GRF4)and GRF-INTERACTING FACTOR1(GIF1),improved regeneration in wheat(Triticum aestivum).By overexpressing a chimeric fusion of Cl GRF4 and Cl GIF1,we achieved highly efficient transformation in *** the mi396 micro RNA target site in Cl GRF further boosted the transformation efficiency up to 67.27%in a genotype-independent *** GRF4-GIF1 can also be combined with clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated protein 9(Cas9)genome editing tools to achieve highly efficient gene editing in watermelon,which we used to successfully create diploid seedless *** research thus puts forward a powerful transformation tool for future watermelon research and breeding.

关键词： gene editing genetic transforamtion GIF GRF watermelon

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Boosting proso millet yield by altering canopy light distribution in proso millet/mung bean intercropping systems

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The crop Journal 2020年第2期8卷 365-377页

作者： Xiangwei Gong Uzizerimana Ferdinand Ke Dang Jing Li Guanghua Chen Yan Luo Pu Yang Baili Feng state key laboratory of crop stress biology in arid areas Shaanxi Research Station of Crop Gene Resources&Germplasm EnhancementMinistry of AgricultureCollege of AgronomyNorthwest A&F UniversityYangling 712100ShaanxiChina

To elucidate the mechanism by which intercropping proso millet(Panicum miliaceum L.)with mung bean(Vigna radiata L.)increases proso millet yield and to determine how this higher yield results from maximization of resources use efficiency,we designed and conducted four strip intercropping row arrangements,including two rows of proso millet alternating with two rows of mung bean(2P2M),four rows of proso millet alternating with two rows of mung bean(4P2M),four rows of proso millet alternating with four rows of mung bean(4P4M),two rows of proso millet alternating with four rows of mung bean(2P4M),sole proso millet(SP,control)and sole mung bean(SM,control)in Yulin,shaanxi,*** active radiation(PAR)in the canopy,radiation use efficiency(RUE),leaf photosynthetic characteristics,dry matter accumulation and allocation,and yield of proso millet were *** results showed that the intercropping systems had higher PAR than the *** PAR intensities were increased by respectively 2.2%–23.4%,19.8%–59.7%,and 61.2%–133.3%in the proso millet upper,middle and lower canopies compared with *** increase in PAR directly increased RUE,a result attributed mainly to the increase in photosynthetic capacity,including net photosynthetic rate and chlorophyll *** responses resulted in increased dry matter allocation to plant *** of intercropped proso millet was 6.8%–37.3%higher than that under monoculture and the land equivalent ratios for the different intercropping patterns were all greater than unity(>1).In general,yield followed a positive linear function of PAR in the intercropping *** results indicated that intercropping can boost proso millet yield,evidently by altering light distribution within its canopy and consequently increasing RUE,thereby increasing leaf photosynthetic capacity,dry matter accumulation,and allocation to the *** optimum combination for improving the growth and yield of proso millet on the Loe

关键词： intercropping distribution thereby

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Improvement of wheat drought tolerance through editing of TaATX4 by CRISPR/Cas9

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Journal of Genetics and Genomics 2023年第11期50卷 913-916页

作者： Zhongxue Wang Yifang Zhang Zhensheng Kang Hude Mao state key laboratory of crop stress biology for arid areas and College of Plant Protection Northwest A&F UniversityYanglingShaanxi 712100China Yangling Seed Industry Innovation Center YanglingShaanxi 712100China state key laboratory of crop stress biology for arid areas and College of Agronomy Northwest A&F UniversityYanglingShaanxi 712100China

Wheat(Triticum aestivum L.)is a staple cereal crop grown in arid and semi-arid areas worldwide and provides a major source of nutrition ***,its production is often affected by drought or water deficit,a problem which is expected to worsen because of climate change and a rapidly expanding global population;for example,the demand for agricultural water supplies is projected to increase by an estimated 17%by 2025 to compensate for global population growth(Lesk et al.,2016;Hickey et al.,2019.

关键词： CRISPR/Cas9 Wheat drought

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Regulation of phenylpropanoid biosynthesis by MdMYB88 and MdMYB124 contributes to pathogen and drought resistance in apple

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Horticulture Research 2020年第1期7卷 1525-1535页

作者： Dali Geng Xiaoxia Shen Yinpeng Xie Yusen Yang Ruiling Bian Yuqi Gao Pengmin Li Liying Sun Hao Feng Fengwang Ma Qingmei Guan laboratory of apple College of HorticultureNorthwest A&F UniversityYanglingShaanxi 712100China state key laboratory of crop stress biology for arid areas College of Plant ProtectionNorthwest A&F UniversityYanglingShaanxi 712100China

MdMYB88 and MdMYB124 have been demonstrated to be responsible for lignin accumulation in apple under drought *** this study,using a metabolomic approach,we identified differentially accumulated phenylpropanoid and flavonoid metabolites in MdMYB88/124 transgenic RNAi plants under control and long-term drought stress conditions in apple *** confirmed the regulation of phenylalanine by MdMYB88 and MdMYB124 via UPLC-MS in apple roots under both control and drought *** Electrophoretic Mobility Shift Assay(EMSA)and ChIPquantitative PCR(qPCR)analyses,we found that MdMYB88 positively regulates the MdCM2 gene,which is responsible for phenylalanine biosynthesis,through binding to its promoter *** long-term drought conditions,MdMYB88/124 RNAi plants consistently accumulated increased amounts of H2O2 and MDA,while MdMYB88 and MdMYB124 overexpression plants accumulated decreased amounts of H2O2 and *** also examined the accumulation of metabolites in the phenylpropanoid biosynthesis pathway in the leaves of MdMYB88 and MdMYB124 transgenic apple plants after long-term drought *** found that metabolites responsible for plant defense,including phenylpropanoids and flavonoids,accumulated less in the RNAi plants but more in the overexpression plants under both control and drought *** further demonstrated that MdMYB88/124 RNAi plants were more sensitive to Alternaria alternata *** and Valsa mali,two pathogens that currently severely threaten apple *** contrast,MdMYB88 and MdMYB124 overexpression plants were more tolerant to these *** cumulative results of this study provided evidence for secondary metabolite regulation by MdMYB88 and MdMYB124,further explained the molecular roles of MdMYB88 and MdMYB124 in drought resistance,and provided information concerning molecular aspects of their roles in disease resistance.

关键词： drought resistance roots

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Oviposition preference, larval performance and adaptation of Trichoplusia ni on cabbage and cotton

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Insect Science 2015年第2期22卷 273-282页

作者： Yuan-Xi Li Tong-Xian Liu Department of Entomology College of Plant Protection Nanjing Agricultural University Nanjing state key laboratory of crop stress biology for arid areas and key laboratory of crop IPM for the Loess Plateau Ministry of Agriculture of China at Northwest A&F University Yangling Shaanxi China

Most female herbivores ensure to lay eggs where their offspring can develop successfully. The oviposition preferences of females affect strategies in pest management. In this study, the performance of two cohorts of Trichoplusia ni larvae on cabbage and cotton （after they had been transferred from their original host plants） were investigated. The preferences of female moth ovipositing and larval feeding on these two host plants were observed. The results indicated that plants significantly affected oviposition preference of the female adults and development and survival of larvae of T. ni. All females preferred to lay eggs on cabbage than cotton regardless from which host they originated. The detrimental effects of cotton on the development and survival of T. ni larvae originated from cabbage （CaTn） increased with the increase of the larval age when they were transferred. In addition, the host plant change did not significantly affect the development and survival of larvae of T. ni originating from cotton （CoTn）. Larvae of CaTn preferred cabbage plants as compared to cotton plants, whereas larvae of CoTn did not show a significant choice. Although the adult females preferred laying eggs on cabbage, they did not show preferences between cotton and cabbage in a Y-tube olfactometer test. The hypothesis of oviposition preference and performance of larvae was supported by the results of CaTn, whereas they not supported by those from CoTn. Based on these results, the strategy to manage this serious pest was discussed.

关键词： cabbage looper development larval choice oviposition preference

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Vacuolar processing enzyme positively modulates plant resistance and cell death in response to Phytophthora parasitica infection

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Journal of Integrative Agriculture 2023年第5期22卷 1424-1433页

作者： GAO Xian-xian TANG Ya-ling SHI Qing-yao WEI Yu-shu WANG Xiao-xue SHAN Wei-xing QIANG Xiao-yu state key laboratory of crop stress biology for arid areas/College of Agronomy Northwest A&F UniversityYangling 712100P.R.China

Oomycete, particularly Phytophthora species, causes the most devastating crop diseases, such as potato late blight,and threatens the sustainable crop production worldwide. Our previous studies identified Resistance to Phytophthora parasitica 1(RTP1) as a negative regulator of Arabidopsis resistance to multiple biotrophic pathogens and RTP1 lossof-function plants displayed rapid cell death and reactive oxygen species(ROS) production during early colonization of P. parasitica. In this study, we aim to decipher the mechanism of RTP1-mediated cell death, and identify a member of vaculoar processing enzymes(VPEs), γVPE, playing a role in rtp1-mediated resistance to P. parasitica and cell death occurrence. Our results showed up-regulation of the expression of γVPE as well as increased VPE/caspase 1-like protease activity in P. parasitica-infected rtp1 mutant plants. Besides, we found that the VPE/caspase 1-like protease activity was required for the cell death occurrence in Arabidopsis plants during the infection of P. parasitica as well as rtp1-mediated resistance to P. parasitica. Further pathogenicity assays on either Arabidopsis γvpe mutant plants or leaves of Nicotiana benthamiana with transient overexpression of γVPE demonstrated γVPE could positively affect plant resistance to P. parasitica. Together, our studies suggest that γVPE might function as an important regulator of plant defense and cell death occurrence in response to P. parasitica infection, and VPE/caspase 1-like protease activity is required for rtp1-mediated resistance to P. parasitica.

关键词： cell death caspase 1 plant resistance Phytophthora parasitica RTP1 susceptibility factor vacuolar processingenzyme

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A new species of Malus in China,Malus shizongensis Liu ***

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Journal of Integrative Agriculture 2020年第10期19卷 2451-2457页

作者： LIU Zhen-zhong LI Zhong-xing GAO Hua BAO Cha-na College of Horticulture Northwest A&F UniversityYangling 712100P.R.China state key laboratory of crop stress biology for arid areas/shaanxi key laboratory of apple College of HorticultureNorthwest A&F UniversityYangling 712100P.R.China

Based on morphological,molecular biological,and molecular systematic studies,we describe here a new species of Malus from Yunnan,*** compared the morphology of this new species,Malus shizongensis Liu ***,with three Malus species,including ***,***,and *** the appearance of *** was similar to these three species,it differed in height,branch color,branch hair,and flower *** better identify the taxonomy of this new species,genome of *** and that of seven Malus species,including ***,***,***,***,***,***,and *** were analyzed.A phylogenetic tree based on genome analysis indicated that *** was close to ***,*** had its species-specific SNPs,and the number of species-specific SNPs was similar to that of three close species(***,***,and ***).Based on the above information,we named this new species as *** Liu ***.

关键词： Malus new species taxonomy

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