scholarly journals DETERMINATION OF SOME MORPHOLOGICAL CHARACTERS AND FORAGE YIELD OF VETCH (Vicia sp.) GENOTYPES COLLECTED FROM THRACE REGION OF TURKEY

2018 ◽  
Vol 6 (11) ◽  
pp. 276-283
Author(s):  
AlpKayahan Demirkan ◽  
◽  
Ilker Nizam ◽  
Adnan Orak ◽  
Canan Şen ◽  
...  
Keyword(s):  
Morphological Characters ◽  
Forage Yield ◽  
Thrace Region

scholarly journals Relationship Between Root and Yield Related Morphological Characters in Pea (Pisum Sativum L.)

2014 ◽  
Vol 66 (1) ◽  
pp. 3-15
Author(s):  
Sylwia Ciaglo-Androsiuk
Keyword(s):  
Root System ◽  
Morphological Traits ◽  
Lateral Roots ◽  
Morphological Characters ◽  
Yield Potential ◽  
Cultivated Plants ◽  
Genetic Determination ◽  
Canonical Correlations ◽  
Effect On Yield

AbstractRelation between morphological traits of the root system and yield related traits is an important issue concerning efforts aiming at improving of ideotype of cultivated plants species, including pea. In this paper, to analyse the dependency between traits describing the root system morphology and yield potential, Person’s andSpearman's_correlations as well as canonical correlations were used.Root system was analyzed in 14 and 21 day-old seedlings growing in blotting-paper cylinders. Yield potential of pea was analysed in a field experiment. Results of Person’s and Spearman's_correlations revealed that number of lateral roots and lateral roots density were correlated witch yield related traits. Correlation between root length and shoot length was observed only for 14 day-old seedlings. The result of canonical correlations revealed that number of lateral roots and lateral roots density had the largest effect on yield related traits. This work highlights, that in order to improve the yield of pea it might become necessary to understand genetic determination of morphological traits of the root system, especially number of lateral roots.

Report on Australian Coccidae

1929 ◽  
Vol 20 (1) ◽  
pp. 15-37 ◽  
Author(s):  
F. Laing
Keyword(s):  
Morphological Characters ◽  
External Appearance

The following report has been drawn up mainly from collections received through the Imperial Bureau of Entomology from Messrs. C. French and G. F. Hill. I have also included some records resulting from an examination of collections made by Dr. F. R. Rodway and Mr. R. Kelly, while E. E. Green, who has always been very ready to render every assistance, very kindly turned over to me for description several species which he had under manuscript names. Figures of previously described species have been added where considered necessary ; those given by Maskell are often, it must be confessed, misleading, while those used by Froggatt in his Catalogue are illustrations mainly of the external appearance, and, though excellent in their way, are not altogether satsifactory for the critical determination of species. Leonardi in his Monograph of the genus Lepidosaphes was content, where he gave an illustration at all, with one of the pygidial fringe, but there are other characters to be found in the pygidium, and for a full appreciation and understanding of these, this area requires to be figured in entirety. The whole of the Australian Coccid fauna, so distinctive in many respects, requires to be re-examined and fresh descriptions, based on morphological characters, drawn up. Of the numerous genera erected by MacGillivray I have accepted only one in the present paper ; as he based his genera on descriptions only, I prefer to express no opinion on the standing of the others he erected until I have examined a more extensive series of species.

Early determination of sex in jojoba plant by CAPS assay

2010 ◽  
Vol 149 (3) ◽  
pp. 327-336 ◽  
Author(s):  
A. G. INCE ◽  
M. KARACA
Keyword(s):  
Sex Allocation ◽  
A Priori ◽  
Seed Orchard ◽  
Morphological Characters ◽  
Simmondsia Chinensis ◽  
Jojoba Oil ◽  
Dioecious Plant ◽  
Male And Female ◽  
Plant Grown

SUMMARYJojoba [Simmondsia chinensis (Link) Schneider] is a dioecious plant grown for its seeds, which are the source of liquid wax or jojoba oil. The sex of jojoba plants cannot be determined with morphological characters until the plants reach reproductive maturity at 3 or more years old. This difficulty of early sex determination imposes severe constraints in breeding studies and in the sex allocation of seedlings in seed orchard establishment, and importantly in a priori mating designs to produce superior jojoba individuals. This study reports three new cleavage-amplified polymorphic sequence (CAPS) assays, which identify male and female individuals distinctly. One of the assays could also identify hermaphrodite jojoba plants existing in nature or obtained using mutagenesis studies.

Ulva and Enteromorpha (Ulvales, Ulvophyceae, Chlorophyta) in eastern Australia: Comparison of morphological features and analyses of nuclear rDNA sequence data

1999 ◽  
Vol 12 (5) ◽  
pp. 709 ◽  
Author(s):  
Geoffrey W. Woolcott ◽  
Robert J. King
Keyword(s):  
Sequence Data ◽  
Morphological Plasticity ◽  
Morphological Characters ◽  
Australian Study ◽  
Internal Transcribed Spacer Region ◽  
Eastern Australia ◽  
Rdna Sequence Data ◽  
Ulva Australis ◽  
Potential Use

Specimens of Ulva Linnaeus and Enteromorpha Link (Ulvales, Ulvophyceae, Chlorophyta) were collected from 12 sites in eastern Australia and identified to species level on the basis of morphological characters described in the major Australian study of Womersley (1984). The species recognised were Ulva australis Areschoug, U. lactuca Linnaeus, U. fasciata Delile, Enteromorpha compressa (Linnaeus) Greville, E. flexuosa (Wulfen ex Roth) J.Agardh and E. intestinalis (Linnaeus) Link. Species placement within the genera Ulva and Enteromorpha is problematic and features of DNA were examined in order to assess their potential use as characters in species determinations. Analyses were conducted on sequence data derived from the internal transcribed spacer region ITS2, and the 5.8S gene. Groupings of the 12 isolates based on DNA analyses do not correlate with the species identified using morphology nor with the two genera. Further work is required before authoritative conclusions can be reached regarding the significance of morphological plasticity in determination of differences within and between Ulva and Enteromorpha species; nevertheless, DNA studies may provide a backbone of characters upon which to base such a study.

scholarly journals Spines and homologues in ‘araphid’ diatoms

2019 ◽  
Vol 152 (2) ◽  
pp. 150-162 ◽  
Author(s):  
David M. Williams
Keyword(s):  
Morphological Characters ◽  
Comparative Biology ◽  
Molecular Trees ◽  
As If

Background and aims – Many diatoms have spines on the surface of their valves. These structures differ from one taxon to another. Are all these spines the same? Are they homologues of one another? This paper sets out to explore some of the issues surrounding the determination of homologues with reference to members of Fragilariaceae. Methods – A variety of spines from species in Fragilariaceae are examined (in the SEM) and position on the valve documented relative to those already recorded in the literature. Key results – Spines that occur on the valves of some ‘araphid’ diatoms in Fragilariaceae can be interpreted in the light of where they are found. Spines that occur on the virgae can be thought of as modifications of that structure; spines that occur on the vimines can be thought of as modifications of that structure – the two kinds of spines are not homologues of each other. The term ‘spine’, on its own, is not useful for understanding taxon relationships; the term ‘spine’ is not even a character in the comparative biology sense but a descriptive catch-all for something that simply ‘sticks out from a surface’. Conclusions – Systematic characters, those applicable to comparative biology, are modifications of other characters and so are, in one sense, like taxonomies: hierarchical. A consequence of this is that plotting morphological characters on molecular trees of relationships is a futile endeavour – treating characters and their modifications, as if they are static (unit) features of a non-changing entity, is book-keeping not science.

scholarly journals Forage yield and morphogenesis of Megathyrsus maximus cultivars in Roraimas’s savannas

2020 ◽  
Vol 9 (8) ◽  
pp. e652986054
Author(s):  
Newton de Lucena Costa ◽  
Liana Jank ◽  
João Avelar Magalhães ◽  
Amaury Burlamaqui Bendahan ◽  
Braz Henrique Nunes Rodrigues ◽  
...  
Keyword(s):  
Leaf Senescence ◽  
Dry Matter ◽  
Management Practices ◽  
Average Length ◽  
Structural Characteristics ◽  
Forage Yield ◽  
Leaf Appearance ◽  
Forage Yields ◽  
Specific Management

In order to evaluate the forage productivity and the morphogenic and structural characteristics of Megathyrsus maximus cultivars (Massai, Mombasa, Kenya, Tamani, Tanzania and Zuri), an experiment was conduct under natural environmental conditions in the savannahs of Roraima. The highest yields of green dry matter (GDM) were found with cultivars Zuri (4,317 kg ha-1) and Mombasa (4,115 kg ha-1), followed by Kenya (3,868 kg ha-1) and Tamani (3,755 kg ha-1), while Massai (3,341 kg ha-1) and Tanzania (3,225 kg ha-1) were the least productive. GDM yield was directly correlated with LAI and inversely proportional to tiller population density (TPD). The cultivars Tanzania and Kenya had the highest number of tiller leaves and leaf appearance rates, while the highest leaf expansion rates were estimate in cultivars Zuri and Kenya. The highest average length of tiller leaves was estimate in the cultivars Zuri and Mombasa. Leaf senescence rates were inversely proportional to TPD and the highest recorded with the cultivars Mombasa and Tamani. The six cultivars of M. maximus showed satisfactory forage yields and can be recommend for cultivation in the edaphoclimatic conditions of the of Roraima’s savannas. The determination of morphogenic and structural characteristics can contribute to the establishment of appropriate and specific management practices for each cultivar, aiming to optimize its productivity and reduce losses due to leaf senescence.

scholarly journals SEX DETERMINATION OF BALI STARLING (Leucopsar rothschildi) USING MOLECULAR SEXING

2015 ◽  
Vol 2 (1) ◽  
pp. 114
Author(s):  
Putu Indra Pramana Wirastika ◽  
Ignatius Pramana Yuda ◽  
Felicia Zahida
Keyword(s):  
Dna Binding ◽  
Sex Determination ◽  
Gel Electrophoresis ◽  
Morphological Characters ◽  
Molecular Sexing ◽  
Agarose Gel ◽  
Agarose Gel Electrophoresis ◽  
Pcr Products ◽  
Conventional Methods

<p>Bali Starling (Leucopsar rothschildi) are monomorphic at the age of nestling. For the conservation of bird it important is to determine its sex at the earlier stage. Conventional methods have limitations. This study applied PCR-based molecular sexing to answer this issue. This study aimed to obtain the most effective molecular primers to identify the sex of Bali starling. The most common used combination of P2/P8, 2550F/ 2718R and 1237L/1272H primers, which amplify CHD1 gene (Chromo-helicase-DNA-binding) were evaluated. DNA samples were obtained from secondary wing feathers of young Bali Starling. Separation in agarose gel electrophoresis of PCR products showed that the three primers were successfully amplified the samples with different degrees of success, that was 90% (P2/P8), 86.7% (2550F/2718R), and 73.3% (1237L/1272H), respectively. However, only the combination of P2/P4 and 2550F/2718R primers was able to sex Bali Starling based on observation of PCR products on agarose gel. The sizes of the genes were slightly different with those reported on previous studies. Most of the results of molecular sexing were in accordance with the sex based on morphological characters.</p><p><br /><strong>Keywords</strong> : Bali starling, Leucopsar rothschildi, molecular sexing, CHD gene</p>

Determination of mitochondrial DNA haplotypes from sting remnants of the honeybee Apis mellifera (Hymenoptera:Apidae)

1994 ◽  
Vol 84 (4) ◽  
pp. 551-554 ◽  
Author(s):  
W.S. Sheppard ◽  
M.C. Arias ◽  
H. Shimanuki
Keyword(s):  
Morphological Characters ◽  
European Ancestry ◽  
Defensive Behaviour ◽  
Haplotype Data ◽  
The Usa ◽  
Baseline Information ◽  
One Year ◽  
Africanized Honeybees ◽  
Mtdna Haplotype

AbstractAfricanized honeybees are presently expanding their geographic range within the USA and are considered undesirable due to their substantial defensive behaviour. Africanized honeybees can be differentiated from honeybees of European ancestry using discriminant analysis of morphological characters, based on a minimum of ten intact specimens per colony. In this paper we report a PCR-based method suitable for the identification of African or European mtDNA from sting remnants, such as typically remain on victims following a stinging incident. We experimentally simulated collection and shipment conditions with dried and alcohol preservation of stings, and also report that the method was suitable for sting remnants stored with a victim sample for over one year in alcohol. The determination of mtDNA haplotypes from stinger remnants must be tempered by the constraints inherent in interpretation of mtDNA haplotype data. Such data do not provide any information regarding the genetic contribution of the paternal lineage. However, in geographic areas where baseline information regarding European haplotype frequencies is known, the detection of a different mtDNA haplotype in stingers from a victim, especially when associated with observations of extreme defensive behaviour, would certainly be suggestive of Africanization.

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