نتایج جستجو برای: agropyron intermedium

تعداد نتایج: 1066  

یکی از مباحث مورد توجه اکولوژیست‌ها در ارتباط با علوم اکولوژی کاربردی (مثل مرتع‌داری) مبحث تنوع گیاهیست. کاهش تنوع گیاهی اکوسیستم را ناپایدار نموده و توانایی آن در مواجهه با آفات و بیماریها را کاهش می­دهد. این تحقیق که هدف آن بررسی چگونگی مدیریت تیپ­های گیاهی و اولویت‌بندی آن بر اساس تنوع گیاهی تیپ­هاست، در مراتع کرسنک استان چهارمحال و بختیاری که به‌عنوان یکی از مراتع غنی این استان محسوب می­گرد...

Journal: :Crop Science 2023

Wheat streak mosaic virus (WSMV) is a mite-vectored with substantial economic impact on wheat production. One of the effective sources resistance to WSMV, Wsm1, carried translocation from Thinopyrum intermedium. The original whole arm form this (T4DL·4JsS) was highly against WSMV but yield penalty in absence virus. Shorter recombinants Th. intermedium are now available. This study characterized...

2016
Qingfeng Li Yuqing Lu Cuili Pan Miaomiao Yao Jinpeng Zhang Xinming Yang Weihua Liu Xiuquan Li Yajun Xi Lihui Li

Creation of wheat-alien disomic addition lines and localization of desirable genes on alien chromosomes are important for utilization of these genes in genetic improvement of common wheat. In this study, wheat-Agropyron cristatum derivative line 5113 was characterized by genomic in situ hybridization (GISH) and specific-locus amplified fragment sequencing (SLAF-seq), and was demonstrated to be ...

Journal: :Bulletin of entomological research 2002
J A Anstead J D Burd K A Shufran

A 1.0 kb region of the mitochondrial cytochrome oxidase subunit I gene from the greenbug aphid, Schizaphis graminum (Rondani), was sequenced for 24 field collected clones from non-cultivated and cultivated hosts. Maximum likelihood, maximum parsimony and neighbour-joining phylogenies were estimated for these clones, plus 12 previously sequenced clones. All three tests produced trees with identi...

Journal: :Agrarnyj vestnik Urala 2021

Abstract. Purpose. The research is aimed at developing methods for creating highly productive and nutritious pasture agrophytocenoses, adapted to the extreme conditions of arid zone Northern Caspian region. Methods. paper provides an assessment productivity perennial one-species (Agropyron) poly-species (Agropyron, Eutoria, Kochia) agrophytocenoses a five-year period their vegetation, depending...

2017
Yan Zhao Jihong Xie Quanwen Dou Junjie Wang Zhong Zhang

The genomes of five Agropyron Gaertner, 1770 species were characterized using all potential di- or trinucleotide simple sequence repeat (SSR) motifs and four satellite DNA repeats as fluorescence in situ hybridization (FISH) probes. The sites of 5S and 45S rDNA were relatively conserved among the diploid and tetraploid species. A number of sites for the dinucleotide SSRs AC, AG, and pSc119.2 wa...

1998
JOHN W. WALKER SCOTT L. KRONBERG SAUD L. AL-ROWAILY NEIL E. WEST

The objective of these studies was to compare preference for leafy spurge (Euphorbiu es& L.) by sheep and goats. Study 1 was a choice test that paired leafy spurge with either arrowleaf balsamroot (Balsamorhiza sagittata (Pursh)Nutt.) or crested wheatgrass (Agropyron cristatum (L.)Gaertn.) for a 30 minute feeding period. Study 2 consisted of 3 grazing trials on spurgeinfested pastures. Differen...

Journal: :Journal of integrative plant biology 2008
Yanfang Zhang Shuli Niu Wenhua Xu Yi Han

The present study was conducted to examine photosynthetic characteristics of three dominant grass species (Agropyron cristatum, Leymus chinensis, and Cleistogenes squarrosa) and their responses to burning and nitrogen fertilization in a semiarid grassland in northern China. Photosynthetic rate (P(n)), stomatal conductance (g(s)), and water use efficiency (WUE) showed strong temporal variability...

Journal: :Research Journal of Environmental Sciences 2008

This study was conducted to investigate allelopathic effect of the essential oil of Artemisia herba-alba Asso., on seed germination characteristics of  Agropyron desertorum and Agropyron cristatum in a laboratory experiment. Essential oil was extracted from the aerial parts of Artemisia herba-alba using a Clevenger-Type apparatus. The volatile chemical compositions of Artemesia herba-alba were ...

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