检索结果-南通市图书馆

Molecular Diversity in Selected Banana Clones (<i>Musa AAA</i>“Cavendish”) Adapted to the Subtropical Environment of Formosa Province (Argentina)

引用

American Journal of Plant Sciences 2018年第12期9卷 2504-2513页

作者： José Luis Ermini gerardo carlos tenaglia Guillermo Raúl Pratta IICAR UNR CONICET (Instituto de Investigaciones en Ciencias Agrarias de Rosario Universidad Nacional de Rosario Consejo Nacional de Investigaciones Científicas y Técnicas) Facultad de Ciencias Agrarias Campo Experimental “J. F. Villarino” Zavalla Argentina Instituto de Investigación y Desarrollo Tecnológico para la Agricultura Familiar Región Nordeste Argentino Laguna Naineck Pro-vincia de Formosa (IPAF NEA) Argentina Cátedra de Genética Facultad de Ciencias Agrarias Universidad Nacional de Rosario Zavalla Provincia de Santa Fe Argentina

Banana production dates from the 1920s in Argentina. Rhizomes were introduced and dispersed by immigrants from bordering countries in the Northern provinces. There is scarce information on its genetic diversity to assist in crop breeding programs;hence studies of genetic structure between populations and individuals are fundamental for future use. Molecular markers assess the diversity of the crop. This study employed Amplified Fragment Length Polymorphism to investigate the genetic variation in local banana plants from farmer’s fields. Forty-four rhizomes (selected from a total of 860 plants for being stable for production) were used as plant material and 6 primer combinations selected in a previous report were used. Polymorphic fragments present in a given genotype were assigned 1 and those absent were assigned 0. The matrix generated was analyzed by univariate and multivariate analysis. A total 540 bands were scored, of which 100% were polymorphic. The number of the pattern duplicated bands was 23 and twenty-one amplicons were exclusive to banana plants collected in the same farmer’s field. Hierarchical clustering and principal coordinates analyses showed differences between genotypes. The cophenetic correlation of the cluster was 0.63 while the 18% of the total molecular variation was explained by the two principal coordinates. These analyses evidence genetic diversity of the crop according to farmer’s field. In agreement to this observation, analysis of molecular variance revealed that 8.9% of the variation was found among farmer populations and 91.1% within farmer populations. In conclusion, introduction of banana into the subtropical zone was associated with a broader genetic variation in order to increase the genetic homeostasis necessary for adapting the crop to the suboptimal environment of Northeastern Argentinean Formosa Province.

关键词： Agronomy Biodiversity Autotriploidy Molecular Characterization Multivariate Analysis Plant Genetic Resources

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Evidence that chronic hypoxia causes reversible impairment on male fertility

引用

Asian Journal of Andrology 2008年第4期10卷 602-606页

作者： Vittore Verratti Francesco Berardinelli Camillo Di Giulio gerardo Bosco Marisa Cacchio Mario Pellicciotta Michele Nicolai Stefano Martinotti Raffaele tenaglia Department of Medicine and Aging Science University of Chieti Chieti 66013 Italy Department of Basic and Applied Medical Sciences University of Chieti Chieti 66013 Italy Biostatistical Office Regina Elena Institute Rome 00144 Italy Laboratorio di Patologia Clinica H University of Chieti Chieti 66013 Italy

Aim： To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Methods： Seminological parameters of six male healthy mountain trekkers were evaluated in normoxia at sea level. After 26 days exposure to altitude （ranging from 2 000 m to 5 600 m, Karakorum Expedition） the same parameters were again evaluated after returning to sea level. These parameters were once again evaluated after 1 month and then again after 6 months. Results： Sperm count was found to be lower immediately after returning to sea level （P = 0.0004） and again after a month （P = 0.0008）. Normal levels were reached after 6 months. Spermatic motility （%） shows no reduction immediately after returning to sea level （P = 0.0583）, whereas after 1 month this reduction was significant （P = 0.0066）. After 6 months there was a recovery to pre-hypoxic exposure values. Abnormal or immature spermatozoa （%） increased immediately after returning to sea level （P = 0.0067） and then again after 1 month （P = 0.0004）. After 6 months there was a complete recovery to initial values. The total number of motile sperm in the ejaculate was found to be lower immediately after returning to sea level （P = 0.0024） and then again after 1 month （P = 0.0021）. After 6 months there was a recovery to pre-hypoxic exposure values. Conclusion： Chronic hypoxia induces a state of oligospermia and the normalization of such seminological parameters at the restoration of previous normoxic conditions after 6 months indicate the influence of oxygen supply in physiological mechanisms of spermatogenesis and male fertility.

关键词： male fertility hypoxia seminological parameters high altitude

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：