نتایج جستجو برای: Ploidy Level

تعداد نتایج: 1083459  

Ploidy level is one of important factors for plant breeders; therefore models that can predict it are very practical. To estimate of ploidy levels in some species, hybrids and cultivars of Rosa, dimensions of over 500 pollens include pollen length, width and area measured at ABRII. The calculations were carried out in several stages. First, Ploidy levels were regressed with pollen dimensions, a...

ژورنال: :مجله گیاهشناسی ایران 2010
بهنام بخشی محمد جعفر آقایی محمد رضا بی همتا فرخ درویش عیسی ظریفی

در این تحقیق از شمارش کروموزومی و روش فلوسیتومتری برای تخمین سطح پلوئیدی نمونه های مختلفaegilops cylindrica host (2n = 4x = 28, ccdd) موجود در بانک ژن گیاهی ملی ایران استفاده شد. تعداد 100 نمونه  ae. cylindrica در آنالیز فلوسیتومتری با استفاده از ae. tauschiiبه عنوان نمونه کنترل مورد استفاده قرار گرفتند. تمام نمونه های مورد بررسی دارای سطح پلوئیدی 4x بودند. نتایج حاصل از فلوسیتومتری و شمارش کرو...

Journal: :Biology letters 2012
K C King O Seppälä M Neiman

Ploidy-level variation is common and can drastically affect organismal fitness. We focus on the potential consequences of this variation for parasite resistance. First, we elucidate connections between ploidy variation and key factors determining resistance, including allelic diversity, gene expression and physiological condition. We then argue that systems featuring both natural and artificial...

Journal: :Evolution; international journal of organic evolution 2011
Maurine Neiman Dorota Paczesniak Deanna M Soper Austin T Baldwin Gery Hehman

Natural animal populations are rarely screened for ploidy-level variation at a scale that allows detection of potentially important aberrations of common ploidy patterns. This type of screening can be especially important for the many mixed sexual/asexual systems in which sexuals are presumed to be dioecious diploids and asexuals are assumed to be triploid and all-female. For example, elevation...

2016
Sonja Stutz Hariet L. Hinz Kamil Konowalik Heinz Müller-Schärer Christoph Oberprieler Urs Schaffner

Polyploidy is considered to be a major source of genetic diversity in plants. Genome duplication has been shown repeatedly to be associated with changes in biotic interactions, but little is known about whether species traits such as herbivore resistance consistently change with increasing ploidy level among closely related plant species. We tested whether larval survival and performance of the...

Journal: :Breeding science 2016
Ai Xia Gu Jian Jun Zhao Li Min Li Yan Hua Wang Yu Jing Zhao Fan Hua Yuan Chao Xu Shu Xing Shen

The aim of this research was to improve our understanding of how ploidy level influences phenotype and gene expression in Chinese cabbage (Brassica rapa L. ssp. pekinensis). Haploid plants (2n = 10) was induced by 0.2% colchicine to produce diploid (2n = 20) and tetraploid plants (2n = 40). The aneuploid (2n = 24) was also obtained by hybridization between diploid plants as the female and tetra...

Journal: :Current Biology 2008
Sarah P. Otto Aleeza C. Gerstein

Tremendous diversity exists among organisms with respect to their ploidy level, defined as the number of sets of homologous chromosomes per cell. As differences in ploidy represent a potentially major genomic change affecting the evolution of a species, it might be thought that ploidy evolution would be well understood. In fact, our knowledge is fragmentary, and there are several open questions...

In this study, Cannabis plants with different ploidy levels were compared in some growth and biochemical parameters. Tetraploid and mixoploid plants were achieved from previous experiment. Flow cytometry analysis was used to confirm the ploidy level. As a result, root and shoot fresh weight showed a significant increase in tetraploid plants compared to the diploid ones. Chimers showed a sig...

Different ploidy levels, diploid (2n=2x=24) to hexaploid (2n=6x=72) have been reported for Acorus calamus, a perennial medicinal plant. According to available information, there is a significant relationship between the ploidy level and essential oil compositions and medicinal properties of this important genetic resource. However, there is no information about the chromosome number of A. calam...

2010
J. Kevin Parris Thomas G. Ranney Halina T. Knap

ABSTRACT. The genus Magnolia includes over 250 species that range in ploidy level from diploid to hexaploid. Although there is basic information on ploidy levels of various species, sampling has been limited and little information on specific cultivars and hybrids is available. The objective of this research was to determine relative genome sizes and relationships to ploidy levels among a diver...

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