منابع مشابه
تعیین برخی خصوصیات بیولوژیکی و مولکولی potato leafroll virus و potato virus a در استان اصفهان
چکیده سیب زمینی یکی از مهم ترین محصولات زراعی در جهان می باشد. ویروس های متعددی این گیاه را تحت تاثیر قرار می دهند و باعث خسارت اقتصادی قابل توجهی می شوند. ویروس پیچیدگی برگ سیب زمینی potato leafroll virus (plrv) عضو تیپ جنس polerovirus و خانواده luteoviridae و ویروس ای سیب زمینی potato virus a (pva) عضو تیپ جنس potyvirus از خانواده potyviridae شایع ترین ویروس های سیب زمینی می باشند که توسط ش...
15 صفحه اولEffect of Variety, Soil Moisture Content and Cutting Depth on Performance of a Single Row Animal Drawn Groundnut Digger
The challenge of providing a more efficient and cost-effective ways of harvesting groundnut amongst the small holder farmers is imperative in northern Nigeria as a result of intensity of labor requirement in the task. It is reported that up to 40 % of the total labor required to grow groundnut is expanded on harvesting operation and at peak harvest periods, labor shortages often occur leading t...
متن کاملEvolutionarily stable nesting strategy in a digger wasp.
Two alternative “strategies” will not coexist in a population unless on average they are equally successful. The most likely way for such an equilibrium to be maintained is through something equivalent to frequencydependent selection. Females of the digger wasp Sphex ichneumoneus (Sphecidae) nest in underground burrows. They usually dig and provision these by themselves but occasionally a nest ...
متن کاملA Multivariate Hill Estimator
We propose a simple and semi-parametric estimator for the tail index of a regular varying elliptical random vector. Since, for univariate random variables, our estimator boils down to the Hill estimator and it inherits the simplicity and asymptotic properties, we name it after Bruce M. Hill. The estimator is based on the distance between an elliptical probability contour and the outer – or exce...
متن کاملSelf-Fertility in a Cultivated Diploid Potato Population Examined with the Infinium 8303 Potato Single-Nucleotide Polymorphism Array.
Within a population of F hybrids between two genotypes ( L. Group Phureja DM 1-3 516 R44 [DM] and L. Group Tuberosum RH89-039-16 [RH]) used in the potato genome sequencing project, we observed fruit set after self-pollination on many plants. Examination of pollen tube growth in self-fertile and self-unfruitful F plants after controlled self-pollinations revealed no difference in the ability of ...
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ژورنال
عنوان ژورنال: American Potato Journal
سال: 1982
ISSN: 0003-0589,1874-9380
DOI: 10.1007/bf02852604