scholarly journals ANALYSIS OF SOME EMBRYOGENETIC TRAITS OF THE INTRASPECIFIC AND INTERSPECIFIC F1 HYBRID PLANTS G.HERBACEUM L. AND G.ARBOREUM L

2020 ◽  
pp. 268-273
Author(s):  
Kh.A.Muminov
Keyword(s):  
Key Words ◽  
Pollen Grains ◽  
F1 Hybrid ◽  
Hybrid Plants ◽  
Literary Sources ◽  
Brown Fiber ◽  
Positive Heterosis

In this article was given that number of anthers in intraspecific and interspecific F1 hybrid plants obtained from crossing intraspecific varieties of the species G.herbaceum L. and G.arboreum L. were observed that was intermediate (f.harga x subsp.africanum, subsp.obtusifolium x subsp.nanking) and strong negative (subsp.obtusifolium x subsp.perenne, f.harga x subsp.perenne) than the selection material were observed and the number of pollen grains in one anther in groups obtained with the involvement of ruderal and ruderal (subsp.pseudoarboreum x f.harga, f.harga x subsp.pseudoarboreum, f.harga x subsp.perenne, subsp.perenne x f.harga) and (subsp.nanking (brown fiber) x variety «VIR 1372, variety «VIR 1372 x subsp.nanking (brown fiber)) form with the positive heterosis. The obtained data have a kind of versatility and were defined to correspond to the data of literary sources. KEY WORDS: species, intraspecific, interspecific, variety, form, wild, ruderal, sympodial tropical, sympodial subtropical, flower, anther, pollen, pieces.

Isoetes × marensis, a new interspecific hybrid from western Canada

1995 ◽  
Vol 73 (9) ◽  
pp. 1345-1353 ◽  
Author(s):  
Donald M. Britton ◽  
Daniel F. Brunton
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
British Columbia ◽  
Key Words ◽  
North American ◽  
Interspecific Hybrid ◽  
Western Canada ◽  
Hybrid Plants ◽  
Surface Ornamentation ◽  
Scanning Electron

A new interspecific hybrid in Isoetes, I. maritima Underw. × I. howellii Engelm., is delineated and described from the Shuswap Highlands region of British Columbia by means of cytology and scanning electron microscopy of spores. Isoetes × marensis D.M. Britton and D.F. Brunton, hyb.nov. is the name proposed for this taxon. It is triploid (3x; 2n = 33) and is believed to produce only sterile and (or) aborted spores. Hybrid plants have polymorphic spores that demonstrate size and surface ornamentation features intermediate between those of the putative parents. Three populations were examined, each growing with both of the putative parents in silt and sand among granite cobble over clay along an emergent lakeshore. Isoetes × marensis is the first described North American hybrid involving an amphibious Isoetes. It is expected to be a rare taxon owing to the restricted sympatric area of the putative parents and their tendency to occupy different habitats. Key words: Isoetes, Isoetes howellii, Isoetes maritima, hybrid, British Columbia.

scholarly journals Comparison of pollen morphological structures of some taxa belonging to Asparagus L. and Fritillaria L. (Liliaceae) from Turkey

1970 ◽  
Vol 36 (2) ◽  
pp. 111-120 ◽  
Author(s):  
H Ozler ◽  
S Pehlivan
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Key Words ◽  
Transmission Electron Microscope ◽  
Light Microscope ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Exine Sculpture ◽  
Transmission Electron ◽  
Scanning Electron

Pollen grains of 20 taxa from two genera of the Liliaceae were examined and compared by LM (light microscope), SEM (scanning electron microscope) and pollens of four taxa were also examined with TEM (transmission electron microscope). Pollen grains shed as monads. They are monosulcate and ellipsoidal. Fritillaria crassifolia subsp. crassifolia Freyn & Smt. sometimes sheds the pollen as dyads. Exine is semitectate and the tectum is perforate. Columellae are simplicolumellate. Ectexine is thicker than endexine. Exine sculpture (ornamentation) is reticulate, reticulate-rugulate, rugulate and retipilate in Asparagus pollens and reticulate, suprareticulate, rugulate-reticulate and striate-reticulate in Fritillaria pollens. Sulcus extends from distal to proximal in some pollens of Asparagus and Fritillaria.   Key words: Asparagus, Fritillaria, Liliaceae, Pollen morphology DOI = 10.3329/bjb.v36i2.1498 Bangladesh J. Bot. 36(2): 111-120, 2007 (December)

Development of wheat (Triticum aestivum) pollen wall before and after effect of a gametocide

1990 ◽  
Vol 68 (11) ◽  
pp. 2509-2516 ◽  
Author(s):  
Gamal A. El-Ghazaly ◽  
William A. Jensen
Keyword(s):  
Electron Microscopy ◽  
Triticum Aestivum ◽  
Key Words ◽  
Light And Electron Microscopy ◽  
Pollen Grains ◽  
Pollen Wall ◽  
Seed Plants ◽  
Before And After ◽  
After Effect

Light and electron microscopy studies show that pollen wall development in plants treated with the gametocide RH0007 and untreated plants was similar until the stage at which sporopollenin is normally deposited on the wall. At this stage, the pollen wall of treated plants is 80% thinner than that of the control. Shortly after this stage, the pollen grains in the treated plants collapse and abort. We conclude that the gametocide clearly acts through the inhibition of sporopollenin formation, which results in pollen death. As sporopollenin is found only in the pollen wall of seed plants and the spores of nonseed plants, harm to other parts of the plant is not expected to occur. Key words: pollen wall development, Triticum aestivum, gametocide.

scholarly journals White bream (Blicca bjoerkna (Linnaeus, 1758)). Thematic bibliography

2021 ◽  
pp. 93-103
Author(s):  
Ir. Hrytsynyak ◽  
◽  
T. Shvets ◽  
Keyword(s):  
Key Words ◽  
The State ◽  
Time Interval ◽  
Bibliographic Reference ◽  
Alphabetical Order ◽  
Biochemical Characteristics ◽  
Physiological And Biochemical Characteristics ◽  
Literary Sources ◽  
White Bream ◽  
Physiological And Biochemical

Purpose. Forming a thematic bibliographic list of publications on the morphological, ecological, physiological and biochemical characteristics of white bream (Blicca bjoerkna L.), as well as the state of its stocks in natural reservoirs. Methodology. Complete and selective methods were applied in the process of the systematic search. The bibliographic core have been formed with the publications exclusively in Ukrainian and Russian from the fund of scientific library of the Institute of Fisheries NAAS of Ukraine. Findings. A thematic list of publications with a total quantity of 62 sources covering the time interval from 1960 to 2020, and highlighting ecological characteristics of a member of Cyprinidae family, the white bream, as well as considering the state of its populations has been composed. The literary sources were arranged in alphabetical order by author or title, and described according to DSTU 8302:2015 “Information and documentation. Bibliographic reference. General principles and rules of composition”, with the amendments (code UKND 01.140.40), as well as in accordance with the requirements of APA style — international standard of references. Practical value. The list may be useful for scientists, practitioners, students, whose area of interests includes the study of physiological, biochemical, ecological and other characteristics of Cyprinids, in particular white bream (Blicca bjoerkna L.). Key words: white bream, spawning, morphological, physiological and biochemical characteristics, fishing.

scholarly journals Ethnic maps of Ukrainian lands in works of Ukrainian and Russian scientists of the second half of XIX century

2019 ◽  
Vol 53 ◽  
pp. 3-12
Author(s):  
Andriy Baitsar
Keyword(s):  
Nineteenth Century ◽  
Key Words ◽  
Early Nineteenth Century ◽  
Geographical Research ◽  
Ethnographic Studies ◽  
Literary Sources ◽  
History Of ◽  
Ethnic Mapping ◽  
Xix Century ◽  
First Time

The study considered the development of ideas about the limits of settling the Ukrainian people in connection with the compilation of ethnographical map of the Austrian and Russian monarchies, since the 40s of XIX century. The views of Ukrainian and Russian researchers who have studied this issue during different periods are analysed. In the manuscript “Geography of Ptolemy” in 1420 (the author is unknown), the map “Sarmatia” (Sarmatias) (the name of the map is conditional) Ukrainian lands were depicted for the first time and for the first time the map contained the inscription “Sarmatia”. Nicolaus Hermanus, who revised the content of “Geography” by Claudius Ptolemy (Cosmographia Claudii Ptolomaei Alexandrini Manuscript, 1467), first placed the name “European Sarmatia” (Sarmatia Єvropє) on the handwritten map of 1467. In the second (the first one with maps) Bologna edition 1477 (26 maps) of Claudia Ptolemy's “Geography” also contained a map of “European Sarmatia”. In the next Roman edition (1478) the Eighth Map of Europe (Octava Europe Tabula) and the Second Map of Asia (Secunda Asiae Tabula) are contained, which the Ukrainian lands are depicted in. Based on a detailed study and analysis of cartographic sources, summarizing the results of ethnographic, historical and geographical research of Ukrainian ethnic territory tracked changes in the boundaries of settling the Ukrainian ethnos. In the early nineteenth century in many European countries, regular population censuses had been introduced and ethnographic studies related to the Ukrainian national revival had been intensified. It created objective prerequisites for the beginning of ethnic mapping in the 1920s and became possible to map the composition of the population in detail, literally by settlements, to determine the absolute and relative share of a particular nationality in a certain territory. The main cartographic works of Ukrainian and Russian scientists, which depict the Ukrainian ethnic territory, are chronologically highlighted. Many ethnic maps have been described. On the basis of elaboration of a considerable number of cartographic and literary sources, the history of ethnographic mapping of the territory of Ukrainian settlements is chronologically covered. Key words: ethnographic researching, map, Ukrainian lands, ethnos.

scholarly journals Length polymorphisms of simple sequence repeat (SSR) markers in assisted selection for lipoxygenase-free in soybean

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
VALERIA CARPENTIERI-PIPOLO ◽  
Thales Pereira Barreto ◽  
Daiana Alves Silva ◽  
Ricardo Vilela Abdelnoor ◽  
Silvana Rockenbach Marin ◽  
...  
Keyword(s):  
Ssr Markers ◽  
Null Allele ◽  
Seed Quality ◽  
Soybean Seed ◽  
Hybrid Population ◽  
Human Consumption ◽  
F1 Hybrid ◽  
Hybrid Plants ◽  
Length Polymorphisms ◽  
Glycine Max L

Beany flavor of soybean (Glycine max (L.) Merr.) is caused by oxidation of polyunsaturated fatty acids by the action of three lipoxygenases (LOX1, LOX2 and LOX3) present in mature seeds. The unpleasant flavor restricts human consumption of soybean products. This problem could be solved through genetic elimination of alleles that code these enzymes. Parental cultivars and two hybrid population were selected and analyzed using genetic markers for alleles locus, encoding Lox1, Lox2 and Lox3 free. The SSR marker Satt212 confirmed the presence of the homozygous null-allele Lx3 in the cultivar BRS 213, which were used for hybridization with BR 36. Heterozygote F1 hybrid plants and homozygous Lx3 lines in F2 segregating populations were successfully identified.  The SSR markers Sat090 and Sat417 was the most effective diagnostic marker among the all SSR markers tested. Satt090 and Satt417 confirmed the presence of the homozygous Lx2 null-allele in the parental cultivar BRS 213 by flanking Lx2 loci at 3,00 and 2,77 cM, respectively. The presence of Lx2 null allele in The F2 segregating populations between BRS 213 and BRS 155 were successfully identified with a selection efficiency of 98% and have great potential for further application in the Brazilian breeding program aimed at improving soybean seed quality.

scholarly journals Pollen morphology of some Turkish Campanula spp. and their taxonomic value

1970 ◽  
Vol 37 (1) ◽  
pp. 33-42 ◽  
Author(s):  
Ismuhan Potoglu Erkara ◽  
Atila Ocak ◽  
Sevil Pehlivan
Keyword(s):  
Key Words ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Exine Sculpture ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
First Time ◽  
Scanning Electron

Detailed pollen morphological structures of 12 Turkish species of Campanula L., e.g. C. argaea, C. cymbalaria, C. glomerata subsp. hispida, C. latiloba subsp. latiloba, C. lyrata subsp. lyrata, C. olympica, C. persicifolia, C. pterocaula, C. rapunculoides subsp. cordifolia, C. rapunculus var. rapunculus, C. stricta var. stricta, C. pamphylica subsp. tokurii have been studied under light (LM) and scanning electron microscopes (SEM) for the first time. LM and SEM investigations show that the pollen grains of 12 taxa are more or less oblato-sphaeroidal, triporate (and/or tetraporate), tectum-scabrate, or with circular amb. The exine sculpture is granulate-scabrate in C. argaea, C. lyrata subsp. lyrata, C. stricta var. stricta, C. glomerata subsp. hispida and C. pamphylica subsp. tokurii; but those of C. cymbalaria, C. latiloba subsp. latiloba, C. olympica, C. persicifolia, C. pterocaula, C. rapunculoides subsp. cordifolia and C. rapunculus var. rapunculus are rugulate-scabrate.   Key words: Campanula, Pollen grains, Pollen morphology doi:10.3329/bjb.v37i1.1561 Bangladesh J. Bot. 37(1): 33-42, 2008 (June)

Pedigreed Natural Crossing to Identify Peanut Testa Genotypes1

1982 ◽  
Vol 9 (2) ◽  
pp. 90-93 ◽  
Author(s):  
Ray O. Hammons ◽  
W. D. Branch
Keyword(s):  
Genetic Markers ◽  
Arachis Hypogaea ◽  
Natural Hybridization ◽  
Germplasm Enhancement ◽  
F1 Hybrid ◽  
Hybrid Plants ◽  
Arachis Hypogaea L ◽  
The World ◽  
Natural Crossing ◽  
Testa Color

Abstract Pedigreed natural crossing to produce marker-identified hybrids for specific uses has been exploited in USDA-ARS/Georgia cooperative peanut (Arachis hypogaea L.) germplasm enhancement projects since the discovery in 1959 of suitable genetic markers. The principal advantages of natural hybridization using dominant alternative alleles to identify the outcrosses are that (1) the production of F1 hybrid plants is not dependent upon conventional manual emasculation, (2) the identification and harvest of plants exhibiting the markers can be performed by semiskilled workers, and (3) the procedure is more economical than the standard crossing method. We utilized pedigreed natural crosses to screen an extensive sample of white-testa peanut phenotypes from the world gene pool for the five-loci recessive genotype, r1 r1 f1 f1 f2 f2 d1 d1 d2 d2. Four accessions, ‘Spanwhite”, P. I. 299468, P. I. 408730, and P. I. 306228, were found to be recessive at all five of the loci which condition testa color. F2 populations from marker-identified natural crosses of each of these lines to a tester genotype which was homozygously dominant at four of the testa-color loci fit the ratio of 225 tan:31 white expected from the cross of these genotypes.

Genetic compatibility among morphotypes of Vigna lanceolata and implications for breeding improved cultivars

2016 ◽  
Vol 67 (7) ◽  
pp. 739 ◽  
Author(s):  
R. J. Lawn ◽  
Hang T. T. Vu ◽  
L. M. Bielig ◽  
A. Kilian
Keyword(s):  
Full Range ◽  
Diallel Cross ◽  
Genetic Compatibility ◽  
F1 Hybrid ◽  
Reciprocal Crosses ◽  
Tropical Environments ◽  
Hybrid Plants ◽  
Complete Diallel Cross ◽  
Cultivated Species ◽  
Improved Cultivars

As well as being part of the wider gene pool of cultivated species such as mungbean and cowpea, Vigna lanceolata Benth. is of agronomic interest as a potentially useful species in its own right. It is widely adapted across northern Australia from the coast to inland desert regions, and possesses attributes that make it potentially suited as a ley, cover crop or pasture legume in seasonally arid tropical environments. The species comprises several morphotypes that variously differ in their broad geographic distribution, life cycle, habit, edaphic adaptation and/or amphicarpy. In order to assess the potential for breeding improved cultivars, eight representative accessions were hybridised in a complete diallel cross and the viability and fertility of the resultant hybrid progeny evaluated. Of the 56 parental combinations in the diallel, 33 resulted in healthy F1 hybrid plants, and of these, nine were at least partly self-fertile. Six of these combinations were the reciprocal crosses between three of the perennial, tuberous-rooted, amphicarpic morphotypes. Another two were the reciprocal crosses between the two annual morphotypes. The patterns of relatedness among accessions indicated by the cross-pollination studies were broadly supported by DArT molecular marker analyses, and suggested that there has been some genetic differentiation within the V. lanceolata complex. Although the process of speciation remains far from complete, the levels of genetic compatibility between some morphotypes would be inadequate to enable a breeding program to draw easily on the full range of genetic diversity within V. lanceolata. Two plausible breeding options are suggested. The first is the development of perennial, tuberous-rooted, amphicarpic ideotypes suited perhaps as pasture or understorey legumes, drawing on selected accessions from the three perennial morphotypes, where there was sufficient genetic compatibility and which collectively have wide geographical spread. The second is an annual, freely seeding, fibrous-rooted, amphicarpic ideotype suited perhaps for use as a self-regenerating ley legume, drawing on selected accessions from the two annual morphotypes.

Polymorphisme pollinique et polymorphisme génétique

1989 ◽  
Vol 67 (2) ◽  
pp. 538-543 ◽  
Author(s):  
I. Till ◽  
G. Valdeyron ◽  
P. H. Gouyon
Keyword(s):  
Key Words ◽  
Pollen Grains ◽  
Genetic Component ◽  
Key Words Polymorphism ◽  
Polymorphisme Génétique ◽  
Pollen Evolution ◽  
Pollen Polymorphism

The polymorphism of the exine of pollen grains was studied in different species to determine if it has a genetic component at the intraspecific level. For some species, the results show that significant differences exist between individuals and that the composition of populations can also vary. The authors conclude that the study of pollen polymorphism could increase our understanding of pollen evolution and the mechanisms of pollen – stigma interactions. Key words: polymorphism, pollen, ash, Rumex, iris.

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