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Genetic diversity of Mansonia altissima A. Chev. under different regimes of human impact in the Akure Forest Reserve,Nigeria

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Forestry Studies in China 2010年第4期12卷 193-200页

作者： akindele akinnagbe Oliver GAILING Reiner FINKELDEY Department of Forest Genetics and Forest Tree Breeding Georg August University

Mansonia altissima is an important West African timber tree species. For the purpose of examining the effect of human impact on its genetic diversity, genetic diversity and spatial genetic structure of the species under different regimes of human impact were investigated in the Akure Forest Reserve, Nigeria, using 504 amplified fragment length polymorphism （AFLP） markers. The results indicate a very low genetic diversity in M. altissima within the forest reserve （He = 0.045; PPL = 16.75%; Br = 1.162）. The highest genetic diversity was observed in the primary forest （H e= 0.062; PPL - 21.00%; Br = 1.204）, with the lowest genetic diversity in the isolated forest patch （He = 0.032; PPL = 9.00%; B r= 1.089）. A significant and pronounced spatial genetic structure was found in the logged forest and in the isolated forest patch. In contrast, the primary forest exhibited very weak spatial genetic structuring. As expected, no spatial genetic structure was found in the planted stands of M. altissima. From a conservation point of view, our results suggest that genetic diversity ofM. altissima is at risk in the forest reserve. The scale of human impact in the study area could pose a serious threat to the maintenance of genetic diversity of the species. These results would offer practical applications in the conservation of other tropical tree species.

关键词： AFLP Mansonia altissima human impact genetic diversity spatial genetic structure tropical rainforests

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基于EST-SSR标记的天山云杉天然群体遗传多样性分析

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分子植物育种 2018年第13期16卷 4333-4343页

作者：陈兴浩 akinnagbe akindele 杨敏生张军河北农业大学林学院保定071000 河北省林木种质资源与森林保护重点实验室保定071000

本研究采用7对引物对新疆26个天山云杉群体中的945个样本进行了EST-SSR标记分析,揭示其遗传多样性。研究发现,新源和阜康等17个地区群体的基因多样性指数介于0.374~0.520之间;在新源和阜康的种群中发现的位点等位基因数表明海拔和等位... 详细信息

本研究采用7对引物对新疆26个天山云杉群体中的945个样本进行了EST-SSR标记分析,揭示其遗传多样性。研究发现,新源和阜康等17个地区群体的基因多样性指数介于0.374~0.520之间;在新源和阜康的种群中发现的位点等位基因数表明海拔和等位基因多样性存在一定正相关关系。根据Hardy-weinberg平衡定律,基于EST-SSR标记的天山云杉天然群体的稀有等位基因频率没有出现偏离(Fis=-0.018),其中92.84%的遗传变异出现于群体内部。通过与其他云杉物种对比分析,表明天山云杉具有中度的遗传多样性水平;在新源、阜康地区发现了7个独有的等位基因。通过天山云杉群体的遗传多样性分析,为天山云杉种质资源的保护和遗传改良提供了实践参考。

关键词：天山云杉 EST-SSR标记遗传多样性

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Assessment of Gender Policy in Selected Tertiary Agricultural Education Institutions in Africa

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Agricultural Sciences 2015年第9期6卷 1039-1047页

作者： Drame Yaye Aissetou Oluwole Matthew akinnagbe Ochola Alfred Chakeredza Sebastian Hien Mipro African Network of Agriculture Agroforestry and Natural Resources Education Nairobi Kenya Department of Agricultural Extension & Communication Technology Federal University of Technology Akure Nigeria Institute of Rural Development Polytechnic University of Bobo-Diuolasso Bobo-Diuolasso Burkina Faso

The paper assesses the existing gender policy document in fourteen (14) selected agricultural faculties and colleges in tertiary institutions in Africa. This paper is an output of research report on Programme of Strengthening Africa’s Strategic Agricultural Capacity for Impact on Development (SASACID) implemented by the African Network for Agriculture, Agroforestry and Natural Resources Education (ANAFE). Data for the study were collected from 207 respondents (8 deans of ANAFE SASACID pilot institutions, 36 academic staff/lecturers of SASACID pilot institutions and 163 students of SASACID pilot institutions) through the use of online survey. Data collected were analysed and presented using frequency, percentage and charts. Results of the survey revealed that 25.0% of the institutions studied indicated that they had a formal gender policy document in place in their institutions with regards to staff recruitment and students’ admission, while about 25.0% had an informal gender practices on staff recruitment and students’ admission. Higher proportion (60.0%) of the institution had neither a formal policy document nor informal practices as regards staff recruitment and students admission. Some of the constraints faced by the Institutions with a gender policy were insufficient female applicants in agricultural courses, societal norms and remote location of some of the faculties/colleges of agriculture. To encourage both males and females to study agriculture in higher institutions of learning and to create and sustain a fair and just academic environment where both have equal opportunities, there is a need to have a gender policy document and the need to create awareness.

关键词： Gender Policy Tertiary Agricultural Education Institutions Africa

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