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Evaluation of high yielding soybean germplasm under water limitation

journal of Integrative Plant Biology 2016年第5期58卷 475-491页

作者： Silvas j.Prince Mackensie Murphy Raymond N.Mutava Zhengzhi Zhang Na Nguyen Yoon Ha Kim Safiullah M.Pathan grover j.shannon Babu Valliyodan Henry T.Nguyen National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri

Limited information is available for soybean root traits and their plasticity under drought stress. To date, no studies have focused on examining diverse soybean germ- plasm for regulation of shoot and root response under water limited conditions across varying soil types. In this study, 17 genetically diverse soybean germplasm lines were selected to study root response to water limited conditions in clay （trial 1） and sandy soil （trial 2） in two target environments. Physiological data on shoot traits was measured at multiple crop stages ranging from early vegetative to pod filling. The phenotypic root traits, and biomass accumulation data are collected at pod filling stage. In trial 1, the number of lateral roots and forks were positively correlated with plot yield under water limitation and in trial 2, lateral root thickness was positively correlated with the hill plot yield. Plant Introduction （PI） 578477A and 088444 were found to have higher later root number and forks in clay soil with higher yield under water limitation, in sandy soil, P1458o2o was found to have a thicker lateral root system and higher yield under water limitation. The genotypes identified in this study could be used to enhance drought tolerance of elite soybean cultivars through improved root traits specific to target environments.

关键词： Fibrous root root angle root plasticity root systemarchitecture (RSA) root thickness spectral indices soybean spectralindices total root length water limitation

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Application of Digital PCR in the Analysis of Transgenic Soybean Plants

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Advances in Bioscience and Biotechnology 2016年第10期7卷 403-417页

作者： jinrong Wan Li Song Yalei Wu Pius Brzoska David Keys Caifu Chen Babu Valliyodan j. grover shannon Henry T. Nguyen Division of Plant Sciences University of Missouri Columbia MO USA Genetic Medical & Applied Sciences Division Thermo Fisher Scientific South San Francisco CA USA Integrated DNA Technologies Redwood City CA USA

Detection and quantification of transgenes are important in analyzing genetically modified organisms (GMOs). Quantitative polymerase chain reaction (qPCR) is commonly utilized for such purposes. However, qPCR has certain limitations in detecting and quantifying transgenes in GMOs, such as the need of certified reference materials, a standard curve, and possible affection by inhibitors. Therefore, alternative and possibly better methods are needed. Recent advances in digital PCR technologies have promised to allow accurate quantification of nucleic acids and therefore provided another useful technique to analyze GMOs. Thermo Fisher ScientificTM has recently commercialized the Applied BiosystemsTM QuantStudioTM 3D digital PCR system that can be used for a wide range of applications involving nucleic acids. It will be beneficial to the scientific community to show the applicability of this digital PCR system in detecting and quantifying transgenes in GMOs. In the present study, the transgenes present in the Roundup Ready Soybean (RR1, event 40-3-2) and Roundup Ready Soybean 2 (RR2, event MON89788) developed by Monsanto Corporation were analyzed by using this digital PCR system. The qPCR analysis results were included for comparison. Using specifically designed TaqMan assays, as low as 1% of the RR1 or RR2 soybean material was reliably detected and quantified on the dPCR platform. Therefore, digital PCR is a sensitive and reliable method to analyze the RR transgenic soybeans, and should be another useful tool for analyzing other transgenic plants.

关键词： Digital PCR GMO qPCR Soybean TaqMan

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