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2 edition of investigation of some lethal interspecific F₁ hybrid combination of the genus Tragopogon. found in the catalog.

investigation of some lethal interspecific F₁ hybrid combination of the genus Tragopogon.

Alan Lewis Hodgdon

investigation of some lethal interspecific F₁ hybrid combination of the genus Tragopogon.

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Published .
Written in English

    Subjects:
  • Genetics -- Research.

  • The Physical Object
    Paginationviii, 38 l.
    Number of Pages38
    ID Numbers
    Open LibraryOL18714149M

    genus Bartonella Strong et al. (Approved Lists ) emend. Birtles et al. species Bartonella quintana (Schmincke ) Brenner et al. The taxonomy from the rank of class and below is based upon currently published taxonomic opinion. For a complete taxonomy, refer to The Taxonomic Outline of Bacteria and Archaea, Release We, the U.S. Fish and Wildlife Service (Service), propose to amend the regulations that implement the Endangered Species Act (Act) by removing inter-subspecific crossed or generic tiger (Panthera tigris) (i.e., specimens not identified or identifiable as members of Bengal, Sumatran, Siberian, or. Prospects for classical biological control of torpedograss, Panicum repens (Poaceae), in the USA J.P. Cuda,1 G.E. MacDonald2 and C.G. Hanlon3 1 Department of Entomology and Nematology, Institute of Food and Agricultural Sciences, University of Florida, PO Box , Gainesville, FL , USAFile Size: 42KB. Free flashcards to help memorize facts about biology exam 1. Other activities to help include hangman, crossword, word scramble, games, matching, quizes, and tests.

    Intra- and inter-clonal variation in gypsy moth larval performance on bigtooth and trembling aspen. Authors. Charley A. Chilcote John A. Witter Michael E. Montgomery Jennifer L. Stoyenoff. Document Type. Article. Journal/Book Title/Conference. Canadian Journal of Forest Research. Volume. Issue. First Page. Last Page. Cited by:


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investigation of some lethal interspecific F₁ hybrid combination of the genus Tragopogon. by Alan Lewis Hodgdon Download PDF EPUB FB2

An introduction to Interspecific hybrids – by Helen Marriott Some attractions of interspecific hybrids. Some of the appealing features of interspecific hybrids can be summarized as follows: When an interspecific hybrid is named, sometimes the information on its.

The taxonomy of the genus Elaeis is reviewed. guineensis and E. oleifera were found to hybridize. Interspecific barriers were only partially developed as was evident from reduced seed set in the interspecific cross and occasional incomplete pairing of chromosomes in the F1 hybrids.

However vigorous F1 hybrids were obtained and the scope for interspecific breeding work is by: The 12 interspecific hybridization combinations were performed in strawberry. • Five ploidy strawberry hybrids, including 5x, 6x, 8x, 9x and 10x were obtained from six combinations.

Two ploidy hybrids (8x and 10x) were obtained from YH (12x) × F. orientalis (♂) (4x) and their origins were speculated. The cold resistant strawberry hybrids with strong aroma were by: 2. Background. The role of hybridization in generating diversity in animals is an active area of discovery and debate.

We assess hybridization across a contact zone of northern (Myodes rutilus) and southern (M. gapperi) red-backed voles using variation in skeletal features and both mitochondrial and nuclear transect extends approximately km along the North Pacific Coast of North Cited by: To investigate interspecific cross-compatibility among Chimonanthus praecox (L.) Link, C.

salicifolius Investigation of some lethal interspecific F₁ hybrid combination of the genus Tragopogon. book. Hu, and C.

nitens Oliver, pollen–pistil interaction by fluorescence microscopy and hybrid embryo development by whole mount clearing technique were observed. The results indicated that for all reciprocal crosses among the three species, pollen grains of the male parents could adhere Cited by: 5.

RNA from the interspecific hybrid hybridized from times to twice as well with A. lixula DNA as with P. lividus DNA, although the hybrid embryos were previously shown 5 to contain more DNA of maternal than of paternal type. Transcription of the paternal (foreign) genome seems therefore to be favored in some way in the interspecific by: Cytogenetical studies were conducted in 8 backcrosses and 76 F2 plants of the interspecific hybrid Setcreasea brevifolia × S.

range of morphological variation and different types of. Summary. Yield and morphology of F 1 hybrids E. guineensis x E. oleifera are discussed. Yield of the hybrids in terms of total fruit weight is promising but the oil content of the mesocarp is intermediate between the parental species and lower than in E.

guineensis. oleifera has a marked tendency towards the production of parthenocarpic fruits. This character is fully dominant in the by: Degeneration of embryo, endosperm and suspensor cells in hybrid embryo at 1 to 5 days after interspecific cross pollination in the genus Fagopyrum were studied by using a light microscope and.

BIOL - Unit 3 - Interactions within Communities study guide by ehackim includes 26 questions covering vocabulary, terms and more. Quizlet flashcards, activities and games help you improve your grades.

ONLINE ISSN: X PRINT ISSN: (As of J ) Registered articles: 4, Article; Volume/Issue/Page; DOICited by: 1. Start studying 8 rev Learn vocabulary, terms, and more with flashcards, games, and other study tools.

After two years in the field, the rust resistant slash pine interspecific F1 hybrid had the least amount of tip moth damage (caused by Nantucket pine tip moth, Rhyacionia frustrana), and the lowest incidence of fusiform rust disease (caused by Cronartium quercuum f.

fusiforme). The highest incidence of fusiform rust occurred on Author: M.T. Highsmith, L.H. Lott, C.D. Nelson. Proanthocyanidins (PAs) are secondary metabolites that strongly affect plant quality traits. The concentration and the structure of these metabolites influence the palatability and nutritional value of forage legumes.

Hence, modulating PAs in the leaves of forage legumes is of paramount relevance for forage breeders worldwide. The lack of genetic variation in the leaf PA trait within the most Cited by:   Grams/individual is higher than in monoculture, no matter what other species are growing in combination.

Interspecific competition is defined as the interaction in which the member of the same group competes for the resources. They compete for food, light, water, space, and reproduction that are necessary for the survival of the species.

individual-and group-based interspecific competition between ALIEN INVASIVE PLANT ERIGERON ANNUUS AND TWO CO-EXISTING HERBS Ai-MingCai 1,Yi-GangSong 2,3,AsadShabbir 4,XinHe 1,RongYan 1,HuiYan 1,LieXu 1,WeiHe 1,Zhuo-WenZhang 1. An investigation was carried out into competition between two species of grass, Bromus madritensis and B.

rigidus. Equal numbers of seeds of B. madritensis were sown in a number of different pots. In each pot, an equal number of seeds of B.

rigidus was then sown a different number of days after B. madritensis. The results are shown in the graphFile Size: KB. Background Hybrids possess phenotypic traits that are often intermediate between their parental taxa, which commonly serves as evidence of hybridization in morphological analyses.

Natural hybridization has been shown to occur frequently in Ligularia (Asteraceae). In a previous study, Ligularia ×maoniushanensis was demonstrated as a natural hybrid species between L.

duciformis and L. Cited by: 3. experiments of backcrossing of interspecific f 1 a. cepa × a. roylei hybrids with allium cepa.

acta hortic. Acta Hortic. DOI: /ActaHortic veloped after interspecific crosses, were re-moved from the maternal plants from which embryos of different sizes were rescued (Table 3). In some developing ovules and ap-parent hybrid embryos signs of abortion were clearly noted.

Ovules were shrunken and ces-sation of growth was evident. Cessation of. Interspecific hybrid bermudagrass [Cynodon dactylon (L.) Pers. x C. transvaalensis Burtt-Davy] is one of the most widely used grasses on golf courses, with cultivars derived from ‘Tifgreen’ or ‘Tifdwarf’ particularly used for putting greens.

Many bermudagrass cultivars established for putting greens can be genetically unstable and lead to the occurrence of undesirable off-type grasses Cited by: 2.

Ebersohn and Eicker — Coprophilous fungi successional phases. Species association class No. Species Toeiv.* Peak phase. Penicillium (biverticillata group) 1. Sporotrichum sp. Coprinus poliomalus 2A. Iodophanus carneus 2A. An interrelated species combination exists between a representative of the Penicillium biverticillata group and a representative of the genus Cited by: The screwworm, Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae), is one of the most devastating arthropod pests of livestock in the Western Hemisphere.

Early instars are very difficult to distinguish morphologically from several closely related blow fly species. Random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR) markers were developed for identifying C Cited by: 7.

Discussion Interspecific Competition - What condition(s must be established before a researcher can definitively state that two species are. As part of your discussion, try to identify some potential examples of interspecific competition that you regularly see in your neighborhood.

Intraspecific (competition) between individuals of the same species; this is usually the strongest because conspecifics generally share more niche space than heterospecifics Interspecific (Competition) between individuals of different species Exploitation competition – organisms compete indirectly through the consumption of a limited resource Interference competition individuals interact.

Syst. Biol. 52(1)–88, DOI: / Speciation on a Conveyor Belt: Sequential Colonization of the Hawaiian Islands by Orsonwelles Spiders (Araneae, Linyphiidae) GUSTAVO HORMIGA,1 MIQUEL ARNEDO,2,3 AND ROSEMARY G. GILLESPIE2 1Department of Biological Sciences, George Washington University, Washington, D.C.USA; E-mail: Cited by: INTERSPECIFIC INHIBITION OF THE RESPONSE OF THE BARK BEETLES, Dendroctonus brevicomis AND lps paraconfusus, 1 TO THEIR PHEROMONES IN THE FIELD J.

BYERS and D. WOOD Department of Entomological Sciences, University of California, Berkeley, California (Received Janu ; revised May 7, ). In natural as in agricultural ecosystems, interactions between ants and honeydew-producing hemipterans are commonly observed.

Mutualisms between invasive ants and hemipterans have been extensively studied in recent years. However, native ant species can equally exploit the honeydew excreted by hemipterans, and establish close relationships with by: 9. The term "wide hybridization" may be defined in two ways: a) it is intercrossing individuals taxonomically remote from each other (species, genera, etc.); and b) it is crossing within the limits of the same species, between individuals which are remote from each other ecologically—between ecotypes from different soils and climates, or between geographically distinct lines or varieties.

In biology, a species (/ ˈ s p iː ʃ iː z / ()) is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity.A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual ways of defining species include.

Lepidium castellanum, L. juvencum and L. oleraceum are threatened coastal cresses endemic to New Zealand. These three species were selfed and interspecific hybrids generated for examination of hybrid fitness and inbreeding depression. In controlled glasshouse experiments, the interspecific hybrids and selfed progeny were inoculated with a strain of the introduced Turnip mosaic virus (TuMV) Cited by: 1.

a. Types of trees b. Age of trees c. Climate d. Precipitation 2. Why is a rain drop a particularly damaging element to soil. Select one: a. It dilutes minerals in the soil. It causes the soil to break apart and carries it away.

It often contains contaminants that poison the soil. It prevents the aeration of the soil. 37 as a recessive maternal-effect suppressor of F1 hybrid male-specific 38 lethality in this combination of species. This result implicates epigenetic 39 meiotic silencing in the suppression of F1 male-specific lethality.

It also is 40 shown that F1 males bearing a. briggsae. X chromosome are fertile. When 41 crossed to. briggsae. An investigation was carried out into competition between two species of grass, Bromus madri-tensis and B.

rigidus. Equal numbers of seeds of B. madritensis were sown in a number of different pots. In each pot, an equal number of seeds of B. rigidus was then sown a different number of days after B. madritensis. The results are shown in the File Size: KB. the following taxonomic combination: Psammodicty-on constrictum f.

parvum (Grunow in Van Heurck ) Belegratis, Louvrou & Economou-Amilli comb. nov. Louvrou and A. Economou-Amilli — Transfer of four taxa of genus Nitzschia to genus Psammodictyon cases, hybrid progeny can be so successful that they completely displace their parental species in the field, such as the Californian wild radish, an invasive hybrid lineage derived from introduced Raphanus sativus and Raphanus raphanistrum (Hegde et al., ).

In the current study, we focus on a native and invasive species pair, SenecioAuthor: Eleanor E Dormontt, Peter J Prentis, Michael George Gardner, Andrew J Lowe.

Identification of naturally occurring hybrids between two overexploited sciaenid species along the South African coast Mirimin L., Kerwath S.E., Macey B., Bester-van der Merwe A., Lamberth S.J., Bloomer P., Roodt-Wilding R.

Abstract Hybridization between fish species can play a. Detecting intraspecific hybrids in Testudo hermanni (Gmelin ) the real peril of genetic pollution in future. Consequently it is essential to have easi-ly accessible parameters for distinguishing cross-bred tortoises and Thb in all areas in which there are individuals or institutions committed to conservation.

Such information. The delimitation of the lichen genus. Bacidia. De Not. has been problematic for. quite a long time and the molecular phylogeny published by E. KMAN () shows. it might be restricted to the highly supported.

rosella. group. Well-circumscribed genera such as. Bilimbia. and. Mycobilimbia. are now widely accepted, but several. others. The genus Eucalyptus (Myrtaceae) is a particularly good system with which to explore hybrid promotion in fragmented landscapes. This is because many species are known to hybridize freely due to weak reproductive barriers (Griffin et al.

) and hybrid swarms have often been associated with the results of human activities such as habitat. The response to apple scab and powdery mildew attack of F1 interspecific hybrids, belonging to different apple ornamental species, used as either maternal or paternal genitors and crossed with several cultivars was studied to establish their resistance or susceptibility.Eucalypt hybrids are significant in forestry, particularly in sub-tropic and tropical regions, where cost efficient, clonal propagation is the key to their exploitation.

However, the outstanding success of selected hybrid clones has given a biased impression of the vigor of eucalypt hybrids and the strength of reproductive barriers in the by: Drag the pink labels to indicate which type of interaction occurs between each pair of species.

Based on those interactions, drag the blue labels to indicate the population changes Knight predicted for each species in the two different treatments.