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Wednesday, July 22, 2020 | History

2 edition of Responses of genetically diverse winter wheat populations to two contrasting management systems found in the catalog.

Responses of genetically diverse winter wheat populations to two contrasting management systems

Kae-Kang Hwu

Responses of genetically diverse winter wheat populations to two contrasting management systems

by Kae-Kang Hwu

  • 153 Want to read
  • 27 Currently reading

Published .
Written in English

    Subjects:
  • Wheat -- Varieties.,
  • Tillage.

  • Edition Notes

    Statementby Kae-Kang Hwu.
    The Physical Object
    Paginationx, 140 leaves, bound :
    Number of Pages140
    ID Numbers
    Open LibraryOL16681678M

    HybriTech US evaluated soft red winter wheat hybrids and their parents for response to winter injury in the Corn Belt region of the United States using a 0 to 9 visual scale. Hybrids were then classified for their response as compared to the two parents and placed into one of five categories using a probability level of P=   The main conclusion of this report was that, although nutrient management in organic systems is fundamentally different, the underlying nutrient pools and cycling processes are not (Stockdale et al. ). Thus, NUE can be assessed in the same way for all the three systems.

    Low H 2 values for some of the SRI measured in this study were expected, as it is typical for diverse populations in un-replicated trials to have low H 2 values, similar with the results of Bowman et al. for a diverse panel of spring wheat lines. Mean values for the SRI significantly decreased from heading to later maturity (grain filling) for. One hundred and seven herbicide-resistant weed biotypes have evolved in various locations around the world. This includes 57 species (40 broad-leaved weeds and 17 grasses) with biotypes resistant to triazine herbicides and 50 species (33 broad-leaved and 17 grasses) with biotypes resistant to 14 other classes of herbicides.

      The geographic distribution of genetic diversity and the population structure of tetraploid wheat landraces in the Mediterranean basin has received relatively little attention. This is complicated by the lack of consensus concerning the taxonomy of tetraploid wheats and by unresolved questions regarding the domestication and spread of naked wheats.   Soil samples. Composite (18 cores) surface soil samples (0 to 10 cm depth) were taken in January from plots of a long-term continuous winter wheat (Triticum aestivum L.) experiment in central ed descriptions of the experimental site and soils have been reported ().Briefly, the experiment was initiated on a Kirkland (fine, mixed, thermic Udertic Paleustolls) silt loam with a.


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Responses of genetically diverse winter wheat populations to two contrasting management systems by Kae-Kang Hwu Download PDF EPUB FB2

Twelve winter wheat composite cross populations (CCPs), based on three genetic backgrounds and maintained at the University of Kassel, Germany, under both organic and conventional management, were assessed for yield performance and stability in comparison to two commercial varieties over eight and 10 experimental years.

A number of stability parameters were chosen in order to identify Author: Odette Denise Weedon, Maria R. Finckh. A potential response to these drawbacks is the use of genetically diverse populations instead of clonal crops (Litrico and Violle, ).

Crop populations can be created by mixing different. Dynamic management of genetic resources, achieved through the cultivation of genetically diverse populations such as CCPs, subjected to different environments and selective pressures, provides an.

Zymoseptoria tritici is the causative fungal pathogen of septoria tritici blotch (STB) disease of wheat (Triticum aestivum L.) that continuously threatens wheat crops in Ireland and throughout Europe.

Under favorable conditions, STB can cause up to 50% yield losses if left untreated. STB is commonly controlled with fungicides; however, a combination of Z.

tritici populations developing. Short term response of European wheat populations to contrasted agro-climatic conditions: a genetic analysis and first step towards development of epigenetic markers in earliness gene VRN-A1Author: Abdul Rehman Khan.

Goldringer I, Prouin C, Rousset M, Galic N, Bonnin I. Rapid differentiation of experimental populations of wheat for heading time in response to local climatic conditions. Ann Bot The mineral composition of cereal crops, the technological value of grain and flour, as well as bread quality are affected by the genotype, environment, and agronomic management practices.

The aim of the research has been to investigate the effect of the environment and agronomic factors on the mineral composition and baking value of winter wheat grain. Opal cultivar grain of the genetically. Effective Population Sizes (N e) of three winter wheat composite cross populations (CCPs) that had been maintained under organic and conventional conditions from the F 7 to the F 12 were number of plants (N) needed to maintain an N e of for each population was calculated based on the mean variation in the number of gametes per parent S k 2.

Comparative analysis of performance and stability among composite cross populations, variety mixtures and pure lines of winter wheat in organic and conventional cropping systems. 1. Introduction. Dietary deficiency of essential micronutrients such as zinc (Zn) and iron (Fe) affects more than two billion people worldwide (White and Broadley,WHO, ), mostly pregnant women and children below the age of five who suffer from severe acute many parts of the world, micronutrient deficiency is a more widespread problem than poor dietary quality.

In contrast to traditional phenotyping-by-eye, the mainstay of selection in breeding programs over the past or more years, HTFP aims to partially automate and thereby reliably quantify previously routine measures of a plant or plot’s phenotype and underlying genotype in response to environment and/or agronomic practise.

Two types of wheat cultivars were tested: (i) a genetically heterogeneous modern population and (ii) modern pure lines.

The Composite Cross Populations used in this experiment originated in the John Innes Centre (Norwich, UK), through the half-diallel crossing of twenty European wheat varieties in In contrast, the two other exotic races were localized to certain regions and/or crop type.

The presence already of at least six multilocus genotypes of the Warrior race and five genotypes of the Kranich race in the first year of detection and across large areas is consistent with a hypothesis of aerial spread from genetically diverse source. Populations 1 and 3 were grown during the –13 (mm precipitation) and –14 (mm precipitation) wheat cycles in Konya; population 2 was grown in the –14 wheat cycle in the same location.

Common check variety ‘Karahan’ was randomly distributed (10% of entries) in each replicated trial for all three populations. Introduction. Tetraploid wheats have played a critical role in human history. Durum is the primary wheat for pasta and semolina production and the second most cultivated wheat after bread wheat (Triticum aestivum L.).Although a ‘relic’ crop today, emmer wheat is used for bread making, animal feed and as a genetic resource for the improvement of durum and bread wheat varieties.

PST field isolates belong to a diverse emergent lineage. (a) A total of samples of wheat and triticale infected with PST were collected from 17 different counties across the United Kingdom (UK) in the spring and summer of Transcriptome sequencing was carried out on 39 samples to generate transcript data from both the pathogen and host.

In total, 1, of 7, tested markers were polymorphic and could be used for population structure analysis. Two major subgroups of wheat. The study assumes that increased response diversity among different cultivars is associated with yield stability.

In contrast, the common, agronomic definition of yield stability refers to the ability of a single cultivar to stably perform well in diverse environments, without excessive responses to fluctuating conditions. In evolutionary plant breeding, crop populations with a high level of genetic diversity are subjected to the forces of natural selection.

In a cycle of sowing and re-sowing seed from the plant population year after year, those plants favored under prevailing growing conditions are expected to contribute more seed to the next generation than plants with lower fitness. Transgene INTROGRESSION from genetically modified (GM) crops into wild relatives is an issue that has rarely been out of the news since the publication, in Nature, in lateof a paper.

Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species. It is distinguished from genetic variability, which describes the tendency of genetic characteristics to vary.

Genetic diversity serves as a way for populations to adapt to changing environments. With more variation, it is more likely that some individuals in a population will possess.Soil mineral N and N net mineralization during autumn and winter under an oilseed rape – winter wheat – winter barley rotation in different crop management systems.

Journal of Agricultural Science, Cambridge– Through the IWIN, wheat germplasm has spread continually since the Green Revolution and is now not only extremely well represented in farmers fields of the developing world, but is also commonly seen in the pedigrees of wheat lines in developed countries (Braun et al.

).The continued effectiveness of these wheat breeding strategies have been demonstrated right up the present with yield.