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黄瓜植株花性型决定主效基因研究进展 被引量:5
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作者 李征 司龙亭 《分子植物育种》 CAS CSCD 2007年第F11期75-79,共5页
黄瓜已经逐渐成为研究植物花性型分化的重要模式植物。黄瓜品种性型多样,主要包括雌雄异花同株、纯雌株、强雌株、两性花株(或称为完全花株)、雄花两性花株(或称为雄花完全花株)和纯雄株。从具体的花形态角度可将黄瓜花分成雌花、雄花... 黄瓜已经逐渐成为研究植物花性型分化的重要模式植物。黄瓜品种性型多样,主要包括雌雄异花同株、纯雌株、强雌株、两性花株(或称为完全花株)、雄花两性花株(或称为雄花完全花株)和纯雄株。从具体的花形态角度可将黄瓜花分成雌花、雄花和两性花三种。近年来黄瓜性别决定主效基因的研究主要集中在控制雌花率的F基因,控制单性花发育的M基因和对雄性化有一定影响的α基因。本文主要介绍黄瓜性型决定假说,分子机制以及主效基因的研究进展,同时对相关基因的研究前景进行了预测。 展开更多
关键词 黄瓜 性型决定 主效基因 研究进展
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黄瓜单性花决定基因M的表达分析 被引量:12
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作者 陶倩怡 李征 +2 位作者 何欢乐 潘俊松 蔡润 《遗传》 CAS CSCD 北大核心 2010年第6期632-638,共7页
植物成花性型决定过程涉及多种机制,而单一基因位点控制非完全花(单性花)的发育为葫芦科植物所特有,其中以黄瓜(Cucumis sativusL.)和甜瓜(C.meloL.)研究最深入。文章利用两对黄瓜近等基因系材料,结合定量PCR技术,研究黄瓜单性花决定基... 植物成花性型决定过程涉及多种机制,而单一基因位点控制非完全花(单性花)的发育为葫芦科植物所特有,其中以黄瓜(Cucumis sativusL.)和甜瓜(C.meloL.)研究最深入。文章利用两对黄瓜近等基因系材料,结合定量PCR技术,研究黄瓜单性花决定基因M(CsACS2,GenBank登陆号:FJ529216)的表达情况。利用药剂(AgNO3和艾维激素)处理不同基因型黄瓜材料,研究在内源乙烯作用被干扰的情况下CsACS2基因的表达变化。结果表明:内源乙烯可以诱导CsACS2基因的表达。在正常生长条件下,这种内源乙烯可能来自CsACS1G基因(F基因)或CsACS2基因(M基因)本身,而后一种情况可能涉及一种正回馈激活机制。 展开更多
关键词 黄瓜 性型决定 M基因 CsACS2 表达分析
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Entrepreneurs as decisive human resources and business performance for the Lao SMEs
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作者 Sengaloun Inmyxai YoshiTakahashi 《Chinese Business Review》 2009年第7期29-47,共19页
Resource-based view (RBV) has been a very important theory to explain performance in the past decades. Among several types of resources, human resources are known as a critical factor for business success. The prese... Resource-based view (RBV) has been a very important theory to explain performance in the past decades. Among several types of resources, human resources are known as a critical factor for business success. The present paper has sought to link the human resources and performance based on the concept of RBV focusing on entrepreneurs as decisive human resources. This paper uses a sample of 378 Lao small and medium enterprises (SMEs). Overall, the findings suggest that the significant factors in explaining performance in Lao SMEs are the education of entrepreneurs, business development services for entrepreneurs and experience of entrepreneurs. Whereas training at starting business and training for entrepreneurs were not supported. 展开更多
关键词 SMES human resources human resource development developing countries and performance
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Minimum Regret Climate Policy with Act-Then-Learn Decision-A New Model Framework under Long-Term Uncertainties
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作者 Shunsuke Mori Takehiko Matsuo Masashi Ohkura 《Journal of Energy and Power Engineering》 2013年第6期1106-1115,共10页
The technology investment strategy under uncertainty is the key subject. However, the expected utility maximization often employed as the decision process fails to consider the high risk with low probability cases. On... The technology investment strategy under uncertainty is the key subject. However, the expected utility maximization often employed as the decision process fails to consider the high risk with low probability cases. On the other hand, the existing min-max regret strategy tends to be dominated by the "worst assumption" regardless of its probability. This research proposes a new framework by formulating the regret by the Minkowski's generalized distance. The authors then apply the formulation to the IAM (integrated assessment model) MARIA. This study focuses on the uncertainties of CCS (carbon capture and storage) costs and the global warming damages. This formulation is then extended to the multi-stage decision frame, known as ATL (act-then-learn) method. The simulation results suggest that the substantial changes in CCS and nuclear deployment strategies depending on the future uncertainty scenarios. The results also suggest that the minimum regret strategy favors the capital accumulation in the early stage. 展开更多
关键词 Decision under uncertainty min-max regret strategy global warming CCS IAM.
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