Mostrando recursos 1 - 20 de 1.108

  1. Evaluation of the genetic diversity among elite tea (Camellia sinensis var. sinensis) accessions using RAPD markers

    Kaundun, SS; Zhyvoloup, A; Park, YG

  2. Performance of different varieties of amaranth (Amamnthus spp.) under net house and open field conditions

    Vasava, HV; Chudasama, VR; Rathva, VD; Dalvaniya, DG; Leua, HN
    © EM International.The present investigation entitled, "Performance of different varieties of Amaranth (Amaranthus spp.) under net house and open field conditions" was carried out from February to May 2013 in the net house and open field at Horticulture Instructional Farm, Department of Horticulture, C. P. College of Agriculture, S. D. Agricultural University, Sardarkrushinagar (Gujarat). Experiment was laid out in split plot design in which five Amaranth varieties (Pusa Lai Chaulai, Chhoti Chaulai, Pusa Kiran, Arka Suguna, Arka Arunima) were sown in two conditions, i.e. net house and open field. Therefore, making total ten treatment combinations which were replicated thrice. Data...

  3. Livro de resumos do IV colóquio nacional de horticultura biológica


    A agricultura biológica tem futuro e o futuro é hoje! É o mote do IV Colóquio Nacional de Horticultura Biológica, que decorre de 17 a 19 de março, no Anfiteatro Verde da Universidade do Algarve, em Faro. Uma iniciativa da Associação Portuguesa de Horticultura (APH) em parceria com a Universidade do Algarve e a Direção Regional de Agricultura e Pescas do Algarve. O IV Colóquio Nacional de Horticultura Biológica pretende ser um espaço de troca de conhecimento, de experiências e de debate que contribua para demonstrar o potencial produtivo, económico e ambiental da agricultura biológica (AB). Este modo de produção...

  4. The multifunctional roles of vegetated strips around and within agricultural fields:A systematic map protocol.

    Haddaway, Neal; Brown, Colin David; Eggers, Sönke; Josefsson, Jonas; Kronvang, Brian; Randall, Nicola; Uusi-Kämppä, Jaana
    Background: Agriculture and agricultural intensification can have significant negative impacts on the environment, including nutrient and pesticide leaching, spreading of pathogens, soil erosion and reduction of ecosystem services provided by terrestrial and aquatic biodiversity. The establishment and management of vegetated strips adjacent to farmed fields (including various field margins, buffer strips and hedgerows) are key mitigation measures for these negative environmental impacts and environmental managers and other stakeholders must often make decisions about how best to design and implement vegetated strips for a variety of different outcomes. However, it may be difficult to obtain relevant, accurate and summarised information on...

  5. Climate change and apple farming in Indian Himalayas: a study of local perceptions and responses.

    Basavaraj Basannagari; Chandra Prakash Kala
    Apple farming is an important activity and profession of farmer communities in the Himalayan states of India. At present, the traditional apple farming is under stress due to changes in climate. The present study was undertaken in an Indian Himalayan state, Himachal Pradesh, with the major aim of studying perceptions of farmers on the effects of climate change on apple farming along the altitudinal gradient. Through questionnaire survey, the perceptions of farmers were recorded at low hills (<2500 m), mid-hills (2500-3000 m), and upper hills (>3000 m). At all elevation range the majority of farmers reported that there was increase...

  6. Composted green waste as a substitute for peat in growth media: effects on growth and nutrition of Calathea insignis.

    Lu Zhang; Xiangyang Sun; Yun Tian; Xiaoqiang Gong
    Peat mined from endangered wetland ecosystems is generally used as a component in soilless potting media in horticulture but is a costly and non-renewable natural resource. The objective of this work was to study the feasibility of replacing peat with different percentages (0, 10, 30, 50, 70, 90, and 100%) of composted green waste (CGW) as growth media for the production of the ornamental plant Calathea insignis. Compared with 100% peat media, media containing CGW had improved physical and chemical characteristics to achieve the acceptable ranges. Moreover, CGW addition had increased the stability (i.e., reduced the decomposition rates) of growth...

  7. Comparative transcriptional analysis of asexual and sexual morphs reveals possible mechanisms in reproductive polyphenism of the cotton aphid.

    Li-Jun Liu; Hong-Yuan Zheng; Feng Jiang; Wei Guo; Shu-Tang Zhou
    Aphids, the destructive insect pests in the agriculture, horticulture and forestry, are capable of reproducing asexually and sexually upon environmental change. However, the molecular basis of aphid reproductive mode switch remains an enigma. Here we report a comparative analysis of differential gene expression profiling among parthenogenetic females, gynoparae and sexual females of the cotton aphid Aphis gossypii, using the RNA-seq approach with next-generation sequencing platforms, followed by RT-qPCR. At the cutoff criteria of fold change ≥2 and P<0.01, we identified 741 up- and 879 down-regulated genes in gynoparae versus parthenogenetic females, 2,101 up- and 2,210 down-regulated genes in sexual females...

  8. Predicting potential global distributions of two Miscanthus grasses: implications for horticulture, biofuel production, and biological invasions.

    Heather A Hager; Sarah E Sinasac; Ze'ev Gedalof; Jonathan A Newman
    In many regions, large proportions of the naturalized and invasive non-native floras were originally introduced deliberately by humans. Pest risk assessments are now used in many jurisdictions to regulate the importation of species and usually include an estimation of the potential distribution in the import area. Two species of Asian grass (Miscanthus sacchariflorus and M. sinensis) that were originally introduced to North America as ornamental plants have since escaped cultivation. These species and their hybrid offspring are now receiving attention for large-scale production as biofuel crops in North America and elsewhere. We evaluated their potential global climate suitability for cultivation...

  9. Identification of the aggregation pheromone of the melon thrips, Thrips palmi.

    Sudhakar V S Akella; William D J Kirk; Yao-bin Lu; Tamotsu Murai; Keith F A Walters; James G C Hamilton
    The objective of this study was to identify the aggregation pheromone of the melon thrips Thrips palmi, a major pest of vegetable and ornamental plants around the world. The species causes damage both through feeding activities and as a vector of tospoviruses, and is a threat to world trade and European horticulture. Improved methods of detecting and controlling this species are needed and the identification of an aggregation pheromone will contribute to this requirement. Bioassays with a Y-tube olfactometer showed that virgin female T. palmi were attracted to the odour of live males, but not to that of live females,...

  10. Evaluation of the DNA barcodes in Dendrobium (Orchidaceae) from mainland Asia.

    Songzhi Xu; Dezhu Li; Jianwu Li; Xiaoguo Xiang; Weitao Jin; Weichang Huang; Xiaohua Jin; Luqi Huang
    DNA barcoding has been proposed to be one of the most promising tools for accurate and rapid identification of taxa. However, few publications have evaluated the efficiency of DNA barcoding for the large genera of flowering plants. Dendrobium, one of the largest genera of flowering plants, contains many species that are important in horticulture, medicine and biodiversity conservation. Besides, Dendrobium is a notoriously difficult group to identify. DNA barcoding was expected to be a supplementary means for species identification, conservation and future studies in Dendrobium. We assessed the power of 11 candidate barcodes on the basis of 1,698 accessions of...

  11. Variation in broccoli cultivar phytochemical content under organic and conventional management systems: implications in breeding for nutrition.

    Erica N C Renaud; Edith T Lammerts van Bueren; James R Myers; Maria João Paulo; Fred A van Eeuwijk; Ning Zhu; John A Juvik
    Organic agriculture requires cultivars that can adapt to organic crop management systems without the use of synthetic pesticides as well as genotypes with improved nutritional value. The aim of this study encompassing 16 experiments was to compare 23 broccoli cultivars for the content of phytochemicals associated with health promotion grown under organic and conventional management in spring and fall plantings in two broccoli growing regions in the US (Oregon and Maine). The phytochemicals quantified included: glucosinolates (glucoraphanin, glucobrassicin, neoglucobrassin), tocopherols (δ-, γ-, α-tocopherol) and carotenoids (lutein, zeaxanthin, β-carotene). For glucoraphanin (17.5%) and lutein (13%), genotype was the major source of...

  12. De novo sequencing, assembly and characterization of antennal transcriptome of Anomala corpulenta Motschulsky (Coleoptera: Rutelidae).

    Haoliang Chen; Lulu Lin; Minghui Xie; Guangling Zhang; Weihua Su
    Anomala corpulenta is an important insect pest and can cause enormous economic losses in agriculture, horticulture and forestry. It is widely distributed in China, and both larvae and adults can cause serious damage. It is difficult to control this pest because the larvae live underground. Any new control strategy should exploit alternatives to heavily and frequently used chemical insecticides. However, little genetic research has been carried out on A. corpulenta due to the lack of genomic resources. Genomic resources could be produced by next generation sequencing technologies with low cost and in a short time. In this study, we performed...

  13. CmMDb: a versatile database for Cucumis melo microsatellite markers and other horticulture crop research.

    Bhawna; Pavan K Chaduvula; Venkata S Bonthala; Verma Manjusha; Ebrahimali A Siddiq; Ananda K Polumetla; Gajula M N V Prasad
    Cucumis melo L. that belongs to Cucurbitaceae family ranks among one of the highest valued horticulture crops being cultivated across the globe. Besides its economical and medicinal importance, Cucumis melo L. is a valuable resource and model system for the evolutionary studies of cucurbit family. However, very limited numbers of molecular markers were reported for Cucumis melo L. so far that limits the pace of functional genomic research in melon and other similar horticulture crops. We developed the first whole genome based microsatellite DNA marker database of Cucumis melo L. and comprehensive web resource that aids in variety identification and...

  14. De Novo Transcriptome Assembly and Characterization for the Widespread and Stress-Tolerant Conifer Platycladus orientalis.

    Xian-Ge Hu; Hui Liu; YuQing Jin; Yan-Qiang Sun; Yue Li; Wei Zhao; Yousry A El-Kassaby; Xiao-Ru Wang; Jian-Feng Mao
    Platycladus orientalis, of the family Cupressaceae, is a widespread conifer throughout China and is extensively used for ecological reforestation, horticulture, and in medicine. Transcriptome assemblies are required for this ecologically important conifer for understanding genes underpinning adaptation and complex traits for breeding programs. To enrich the species' genomic resources, a de novo transcriptome sequencing was performed using Illumina paired-end sequencing. In total, 104,073,506 high quality sequence reads (approximately 10.3 Gbp) were obtained, which were assembled into 228,948 transcripts and 148,867 unigenes that were longer than 200 nt. Quality assessment using CEGMA showed that the transcriptomes obtained were mostly complete for...

  15. The Complete Plastid Genome of Lagerstroemia fauriei and Loss of rpl2 Intron from Lagerstroemia (Lythraceae).

    Cuihua Gu; Luke R Tembrock; Nels G Johnson; Mark P Simmons; Zhiqiang Wu
    Lagerstroemia (crape myrtle) is an important plant genus used in ornamental horticulture in temperate regions worldwide. As such, numerous hybrids have been developed. However, DNA sequence resources and genome information for Lagerstroemia are limited, hindering evolutionary inferences regarding interspecific relationships. We report the complete plastid genome of Lagerstroemia fauriei. To our knowledge, this is the first reported whole plastid genome within Lythraceae. This genome is 152,440 bp in length with 38% GC content and consists of two single-copy regions separated by a pair of 25,793 bp inverted repeats. The large single copy and the small single copy regions span 83,921...

  16. Chemosensory gene families in adult antennae of Anomala corpulenta Motschulsky (Coleoptera: Scarabaeidae: Rutelinae).

    Xiao Li; Qian Ju; Wencai Jie; Fei Li; Xiaojing Jiang; Jingjing Hu; Mingjing Qu
    The metallic green beetle, Anomala corpulenta (Coleoptera: Scarabaeidae: Rutelinae), is a destructive pest in agriculture and horticulture throughout Asia, including China. Olfaction plays a crucial role in the survival and reproduction of A. corpulenta. As a non-model species, A. corpulenta is poorly understood, and information regarding the molecular mechanisms underlying olfaction in A. corpulenta and other scarab species is scant.We assembled separate antennal transcriptome for male and female A. corpulenta using Illumina sequencing technology. The relative abundance of transcripts with gene ontology annotations, including those related to olfaction in males and females was highly similar. Transcripts encoding 15 putative odorant...

  17. An Overview on Test Standards for Evaluation of Jute Agrotextiles

    Prof. Swapan Kumar Ghosh1; Mr. Satyaranjan Bairagi2; Mr. Rajib Bhattacharyya3; Mr. Murari Mohan Mondal4
    The growth of the Indian Economy is significantly reliant on the success of the agriculture community. Traditional methods are limited in their ability to increase yields with the current constraints of restricted space and water supply. In this context, Agrotextiles have proved to be an effective alternative that delivers strong results despite the constraints. Some of the benefits of the usage of agrotextiles are enhancing freshness in fruits and vegetables, prevents soil from drying, protection from harmful pesticides, yield increase etc. However, due to the growing environmental concern across the globe, scientists, technologists and researchers are in search of natural agrotextile...

  18. Genome physical mapping of polyploids: a BIBAC physical map of cultivated tetraploid cotton, Gossypium hirsutum L.

    Meiping Zhang; Yang Zhang; James J Huang; Xiaojun Zhang; Mi-Kyung Lee; David M Stelly; Hong-Bin Zhang
    Polyploids account for approximately 70% of flowering plants, including many field, horticulture and forage crops. Cottons are a world-leading fiber and important oilseed crop, and a model species for study of plant polyploidization, cellulose biosynthesis and cell wall biogenesis. This study has addressed the concerns of physical mapping of polyploids with BACs and/or BIBACs by constructing a physical map of the tetraploid cotton, Gossypium hirsutum L. The physical map consists of 3,450 BIBAC contigs with an N50 contig size of 863 kb, collectively spanning 2,244 Mb. We sorted the map contigs according to their origin of subgenome, showing that we...

  19. Predicting the timing of cherry blossoms in Washington, DC and Mid-Atlantic States in response to climate change.

    Uran Chung; Liz Mack; Jin I Yun; Soo-Hyung Kim
    Cherry blossoms, an icon of spring, are celebrated in many cultures of the temperate region. For its sensitivity to winter and early spring temperatures, the timing of cherry blossoms is an ideal indicator of the impacts of climate change on tree phenology. Here, we applied a process-based phenology model for temperate deciduous trees to predict peak bloom dates (PBD) of flowering cherry trees (Prunus×yedoensis 'Yoshino' and Prunus serrulata 'Kwanzan') in the Tidal Basin, Washington, DC and the surrounding Mid-Atlantic States in response to climate change. We parameterized the model with observed PBD data from 1991 to 2010. The calibrated model...

  20. Alien plants introduced by different pathways differ in invasion success: unintentional introductions as a threat to natural areas.

    Petr Pyšek; Vojtěch Jarošík; Jan Pergl
    BACKGROUND: Understanding the dimensions of pathways of introduction of alien plants is important for regulating species invasions, but how particular pathways differ in terms of post-invasion success of species they deliver has never been rigorously tested. We asked whether invasion status, distribution and habitat range of 1,007 alien plant species introduced after 1500 A.D. to the Czech Republic differ among four basic pathways of introduction recognized for plants. PRINCIPAL FINDINGS: Pathways introducing alien species deliberately as commodities (direct release into the wild; escape from cultivation) result in easier naturalization and invasion than pathways of unintentional introduction (contaminant of a commodity;...

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