Seed flora of La Pérouse Bay, Manitoba, Canada: a DELTA database of morphological and ecological characters

2000 ◽  
Vol 78 (4) ◽  
pp. 481-496 ◽  
Author(s):  
E R Chang ◽  
T A Dickinson ◽  
R L Jefferies
Keyword(s):  
Morphological Characteristics ◽  
Seed Morphology ◽  
Hudson Bay ◽  
Soil Cores ◽  
James Bay ◽  
Seed Shape ◽  
Seed Length ◽  
Ecological Information ◽  
The World ◽  
Seed Width

An identification database for seeds in coastal habitats at La Pérouse Bay, Manitoba, Canada, was developed using the DELTA (DEscriptive Language for Taxonomy) format and the program INTKEY. The database should be applicable throughout the coastal lowlands of the Hudson Bay and James Bay regions as similar plant assemblages are present. The database, based upon morphological characteristics and also incorporating ecological information, was used to identify seed specimens found in soil cores and seed traps. The most useful characters for identifying seeds were seed length, seed width, and seed shape. The database is available on the World Wide Web at http://prod.library.utoronto.ca/polyclave/. The seed flora is also documented in the form of a checklist, the first one published for the La Pérouse Bay region; this checklist is also applicable to other coastal areas in the Hudson Bay lowlands.Key words: Arctic, DELTA, floristics, identification, seed morphology.

Seed morphology of the genus Scrophularia L. (Scrophulariaceae) from Turkey and its taxonomic implications

Phytotaxa ◽  
2020 ◽  
Vol 434 (1) ◽  
pp. 35-64
Author(s):  
FUNDA ÖZBEK ◽  
MEHMET ERKAN UZUNHİSARCIKLI ◽  
MURAT EKİCİ ◽  
EBRU DOĞAN GÜNER ◽  
NUR MÜNEVVER PINAR
Keyword(s):  
Electron Microscopy ◽  
Morphological Characteristics ◽  
Principal Component ◽  
Diagnostic Value ◽  
Morphological Characters ◽  
Seed Morphology ◽  
Seed Length ◽  
Taxonomic Implications ◽  
Seed Width ◽  
Scanning Electron

73 taxa of the genus Scrophularia (Scrophulariaceae) from Turkey have been investigated using light stereomicroscope (LM) and scanning electron microscopy (SEM) in order to describe their seed morphological characteristics and to evaluate the diagnostic value of these features as a contribution to the genus systematics. The seeds are oblong, ellipsoid, ovoid or obovoid in shape and light or dark brown, blackish-brown to black in colour. The seed length ranges from 0.41 to 2.04 mm and seed width from 0.24 to 1.33 mm. All investigated taxa have bireticulate-alveolate ornamentation with vesicles on the corners of secondary reticulum cells except of S. zuvandica. The alveoli are oblong, orbicular and linear with a size of 7.63–143.1 × 21.62–314.2 µm. Cluster analysis and principal component analysis have been used to determine the contribution of seed morphological characters to the taxa relationships. Numerical analysis has revealed that the seed size and the secondary reticulum properties have significant importance in taxonomy of the genus for distinguishing taxa from each other.

scholarly journals Seed Characterization and Relationships between Seed and Cotyledon Properties in Lagenaria spp. Accessions

HortScience ◽  
2020 ◽  
pp. 1-8
Author(s):  
Nebahat Sari ◽  
Emily Silverman ◽  
Danny Reiland ◽  
Todd C. Wehner
Keyword(s):  
Seed Weight ◽  
Germplasm Collection ◽  
Seed Morphology ◽  
Bottle Gourd ◽  
African Countries ◽  
Department Of Agriculture ◽  
Seed Length ◽  
Seed Width ◽  
The Relationship ◽  
Common Character

Bottle gourd [Lagenaria siceraria (Molina) Standl.] is widely produced in some Asian and African countries as a fresh vegetable as well as for seed consumption. A major use of bottle gourd is for rootstocks in grafted watermelon production. There are several centers where bottle gourd genetic resources are maintained, with the U.S. Department of Agriculture (USDA) germplasm collection being one of the most important. There is little published information on the relationship between seed morphology and the early establishment of seedlings in bottle gourd. The objective of this study was to determine seed characterization, morphology, and cotyledon shape in 163 Lagenaria spp. accessions and measure any relationship between seed and cotyledon characteristics. In USDA Lagenaria germplasm, it has been determined that the common character in seeds was medium in terms of seed size (53% of accessions), intermediate in seed surface lustre (39% of accessions), brown in seedcoat color (89% of accessions), thin and uniform in seed margin (35% of accessions), and tan in seed margin color (64% of accessions). According to the research results, seed weight ranged from 0.11 g (PI 500820) to 0.36 g (PI 675112), seed length from 13.17 mm (PI 500820) to 23.68 mm (PI 675112), and seed width from 5.86 (PI 500808) to 11.21 mm (PI 491274). Cotyledon length ranged from 5.46 cm (PI 368640) to 2.47 cm (PI 381850). The widest cotyledon was 3.00 cm (PI 534552), and the narrowest was 1.50 cm (PI 381831). Interesting correlations were observed for seed weight with seed length (R2 = 0.259), and cotyledon length with cotyledon width (R2 = 0.547).

scholarly journals Macro and micro-morphological characteristics of Plantago seeds and its implication for species identification

2017 ◽  
Vol 8 ◽  
Author(s):  
Ashutosh KUMAR Verma ◽  
Neelam Gautam Kumar Avinash Bharti
Keyword(s):  
Electron Microscope ◽  
Cell Shape ◽  
Morphological Characteristics ◽  
Morphological Characters ◽  
Seed Morphology ◽  
Cavity Surface ◽  
Seed Shape ◽  
Surface Ornamentation ◽  
Seed Characters ◽  
Scanning Electron

<p>Seed morphology of five species of<em> Plantago</em> (<em>P</em><em>. psyllium, P.ovata, P. lanceolata, P. major</em> and <em>P. arenaria</em>) was examined under scanning electron microscope. Macro- and micro-morphological characters, including seed shape, colour, size, shape of cavity, surface ornamentation and epidermal cell shape are presented.  Marked difference among the species noted with respect of considered traits and a key for the identification of the investigated taxa based on seed characters is provided. </p><p> </p>

scholarly journals Seed morphology in the genus Iris (Iridaceae) from Russia

VAVILOVIA ◽  
2020 ◽  
Vol 3 (1) ◽  
pp. 5-28
Author(s):  
N. B. Alexeeva
Keyword(s):  
Seed Coat ◽  
Conservation Status ◽  
Morphological Characteristics ◽  
Distinct Species ◽  
Seed Morphology ◽  
Seed Shape ◽  
Data Book ◽  
The Russian Federation ◽  
Taxonomic Relations ◽  
Regional Conservation

The genus Iris in Russia is represented by 41 species. Four species are endemic, 11 are included in the Red Data Book of the Russian Federation and 30 have different regional conservation status. The presented results of the study of the morphology of seeds and of seed coat surface morphology in 40 species from the genus Iris growing in Russia were obtained mainly using light and scanning electron microscopy. Seed shape is round, ovate, oblong or pear‑shaped, with the exception for I. psammocola, in which it is club‑shaped. The smallest seeds in the studied species belong to I. ruthenica and I. uniflora. Morphometric data lead to interesting conclusions regarding the taxonomic relations between some species. For example, the species currently considered as synonyms, e.g., I. biglumis and I. pallasii in I. lactea, and I. maackii in I. pseudacorus, are found different concerning seed morphology. On the other hand, the taxonomically well distinct species such as I. halophila and I. pseudonotha share similar seed morphology. A study of the morphological characteristics of the seed coat surface in 40 species of the genus Iris made it possible to compile an atlas for determining species in the genus Iris in Russia.

scholarly journals Evaluation of Traits Associated With Seed Characteristics in Arkansas Restorer Lines

2021 ◽  
Author(s):  
Ozgur Azapoglu ◽  
Vibha Srivast ◽  
Xueyan Sha ◽  
Ehsan Shakiba
Keyword(s):  
Hybrid Rice ◽  
Width Ratio ◽  
Rice Grain ◽  
University Of Arkansas ◽  
Qtl Detection ◽  
Seed Shape ◽  
Seed Length ◽  
Length Width ◽  
Seed Width ◽  
Seed Characteristics

Abstract Rice Grain dimension and weight are two critical factors for marketing and increasing yield capacity. Seed shape is measured by its length, width, thickness, and ratio of length-width. In this study, an experiment was conducted in a controlled condition from fall 2017 to 2020 to identify QTL and candidate genes associated with seed dimension and weight using a bi-parental population resulting from two University of Arkansas developed genotypes: a restorer line 367R and an advanced breeding line RU1501139, in Stuttgart, Arkansas. Five seed dimension traits, including seed length, seed width, seed thickness, seed length-width ratio, and 100-seeds weight, were obtained for QTL detection. The study detected a total of 17 QTL. Four QTL associated with seed length were identified, in which two were positioned on chr. 3, one on chr. 7, and one on chr. 11. Two QTL related to seed length-width ratio were detected on chr. 3 and 7. Whereas a total of three QTL were identified for seed thickness, one each on chr. 5, 6, and 8. Eight QTL associated with seed weight were found, of which four QTL were detected on chr. 12, two each on chr. 1 and 10, and one on chr. 3. Of 17 QTL, four QTL originated from RU1501139, while the origin of the other 13 QTL was 367R. Since multiple genes could control the yield and seed physical characteristics, the detected QTL can play a role in introducing superior parental lines for developing conventional and hybrid rice production.

scholarly journals Morphological Seed Characterization of Common (Phaseolus vulgarisL.) and Runner (Phaseolus coccineusL.) Bean Germplasm: A Slovenian Gene Bank Example

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Lovro Sinkovič ◽  
Barbara Pipan ◽  
Eva Sinkovič ◽  
Vladimir Meglič
Keyword(s):  
Morphological Variability ◽  
Gene Bank ◽  
Width Ratio ◽  
Gene Pools ◽  
Seed Colour ◽  
Seed Shape ◽  
Seed Length ◽  
Runner Bean ◽  
Seed Width ◽  
Seed Characteristics

Genetic resources comprised of 953 accessions of common (Phaseolus vulgarisL.) and 47 accessions of runner (Phaseolus coccineusL.) bean from the national Slovene gene bank were characterized using fourteen morphological seed descriptors. Seeds of each accession were evaluated for six quantitative characteristics: seed length, seed thickness, seed width, seed length/width ratio, seed width/thickness ratio, and 100 or 10 seed weight. Furthermore, seeds were evaluated using eight qualitative characteristics: seed colour; number of seed colours; primary/main seed colour; predominant secondary seed colour; distribution of secondary seed colour; seed veining; seed shape; and seed colour (primary and secondary) and coat pattern. For each, common, and runner bean collection, first four components within principal component analysis explained 75.03% and 80.16% of morphological variability, respectively. Regarding Ward’s method and squared Euclidian distance, three clusters with the most distinct characteristics were established for each species. The results of morphological seed characterization indicate the origin (Andean, Mesoamerican, putative hybrids between gene pools) and domestication pathways of common and runner bean. This is the first study describing morphological seed characteristics of the entire common and runner bean germplasm conserved in one of the Central European bean collections. The results obtained in this study are serving as the useful information on genetic diversity of common and runner bean accessions at the Slovene gene bank, which could be used for development of new bean varieties for studied seed characteristics.

scholarly journals Seed development stages of kale (Brassica oleracea var. acephala L.) genotypes in Turkey

2011 ◽  
Vol 32 (No. 4) ◽  
pp. 147-153 ◽  
Author(s):  
E. Demir ◽  
A. Balkaya
Keyword(s):  
Brassica Oleracea ◽  
Seed Development ◽  
Germination Rate ◽  
Maximum Level ◽  
Brassica Species ◽  
Seed Morphology ◽  
Seed Length ◽  
Seed Moisture ◽  
Seed Width ◽  
Embryo Length

This research determined the stages of kale (Brassica oleracea var. acephala L.) seed development in Samsun province, Turkey, between 2002 and 2003. Plants of inbred kale lines (55TE07, 55TK09, 52PE09, 61&Ccedil;Y01 and 67DE01) were grown. On the basis of seed and embryo colour, seed morphology (seed length, seed width and embryo length), seed development can be divided into 7 discrete but contiguous stages. The germination rate of inbred lines was at its maximum, or near to its maximum, until the seed moisture declined to 50%. Germination rates reached a maximum level at 65 days after pollination (DAP). It was concluded that kale seeds should be harvested when pods became brown in stage 7 (65 DAP). This study will be used for comparisons with seed development in other Brassica species. &nbsp;

scholarly journals Variasi Karakter Biji dan Korelasinya dengan Kadar Minyak pada Plasma Nutfah Tanaman Bunga Matahari (Helianthus annus L.)

2016 ◽  
Vol 6 (2) ◽  
pp. 91
Author(s):  
Anik Herwati ◽  
Tantri Dyah Ayu Anggraeni
Keyword(s):  
Oil Content ◽  
Selection Process ◽  
Breeding Programme ◽  
Seed Colour ◽  
Seed Shape ◽  
Seed Length ◽  
Quantitative Characters ◽  
Helianthus Annus ◽  
Qualitative Characters ◽  
Seed Width

<p>Tanaman bunga matahari (Helianthus annus L.) adalah salah satu tanaman penghasil minyak nabati yang sehat dan bermutu. Salah satu upaya peningkatan produksi minyak adalah dengan program pemuliaan ta-naman melalui perakitan varietas unggul yang mempunyai produktivitas dan kandungan minyak tinggi. Pro-ses pemuliaan tanaman memerlukan keragaman genetik dan proses seleksi. Oleh karena itu evaluasi sumber daya genetik yang ada perlu dilaksanakan, salah satunya pada karakter biji. Sedangkan untuk memudahkan proses seleksi perlu diketahui karakter yang berkorelasi positif dengan produksi minyak. Tujuan penelitian ini adalah untuk mengetahui variasi karakter biji dan korelasinya dengan kadar minyak. Kegiatan dilaksanakan pada tahun 2011 di Laboratorium Benih Balittas dan Laboratorium Kimia Universitas Brawijaya untuk uji ka-dar minyak. Jumlah aksesi bunga matahari yang diuji ada 19 aksesi bunga matahari hasil rejuvenasi tahun 2011. Dari tiap aksesi, diambil 300 gram benih hasil panen yang belum disortir, yang diambil secara acak dan diulang 3 kali. Pengamatan dilakukan pada karakter kualitatif yaitu warna biji, garis pada biji, dan ben-tuk biji, dan karakter kuantitatif yaitu bobot 100 biji, panjang, dan lebar biji, serta kadar minyak. Hasil pe-ngamatan pada karakter kualitatif menunjukkan variasi pada warna biji, garis (stripes), dan bentuk biji. Pada karakter kuantitatif, nilai koefisien keragaman (KK) pada semua karakter yang diamati mencapai lebih dari 20%. Karakter yang paling bervariasi adalah kadar minyak biji. Hasil pengujian korelasi menunjukkan karak-ter bobot 100 biji berkorelasi positif dengan karakter panjang, lebar, dan bentuk biji, dan berkorelasi negatif dengan karakter kandungan minyak. Sedangkan ukuran biji dan kadar minyak tidak menunjukkan korelasi yang nyata.</p><p> </p><p>Sunflower (Helianthus annus L.) is one of vegetable oil crops that produce healthy and high quality oil. In-creasing oil content could be reached by breeding programme to obtain new variety with high productivity and oil content. Breeding programme needs genetic diversity and selection process. So, germplasm evalu-ation, especially for seed characteristic must be done. To make selection process easier determination cha-racters that correlate with oil content needs to be conducted. This experiment aimed to evaluate variation in seed characteristics and to determine correlation between seed characters and oil content on sunflowers. Experiment was done in 2011 on Seed Laboratory ISFCRI and Brawijaya University Laboratory (oil content extraction). Plant materials are 19 s unflower accesions. For each accesion, 300 grams seed were taken ran-domly and replicated 3 times. Observation was done on qualitative characters i.e. seed colour, seed stripes, and seed shape and quantitative characters i.e. 100 seeds weight, seed length, and seed width, also oil con-tent. Result showed that there were variations among seed colour, seed stripes, and seed shape (qualitative characters). Coefficient variation (CV) was more than 20% for all quantitative characters and the highest was being reached by oil content. Correlation evaluation resulted that 100 seeds weight had positive corre-lations with seed length, seed width, and seed shape, but had a negative correlation with oil content. How-ever, seed size wasn’t correlate with oil content.</p>

Detection and Mapping of RAPD Markers Associated with QTL Affecting Seed Size and Shape in Common Bean

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 547b-547
Author(s):  
Soon O. Park ◽  
Dermot P. Coyne ◽  
Geunhwa Jung ◽  
E. Arnaud-Santana ◽  
H. Ariyarathne
Keyword(s):  
Linkage Group ◽  
Common Bean ◽  
Seed Size ◽  
Phenotypic Variation ◽  
Seed Weight ◽  
Rapd Markers ◽  
Rapd Marker ◽  
Seed Shape ◽  
Seed Length ◽  
Ri Lines

Seed size is an important trait in common bean. The objective was to identify RAPD markers associated with QTL for seed weight, seed length, and seed height in a molecular marker-based linkage map in a recombinant inbred (RI) population from the common bean cross of the larger seeded (100 seed/39 to 47 g) PC-50 (ovate seed shape) × smaller seeded (100 seed/26 to 35 g) XAN-159 (flat rhomboidal seed shape). The parents and RI lines were grown in two separate greenhouse and two field (Wisconsin, Dominican Republic) experiments using a RCBD. Continuous distributions for seed weight, seed length, and seed height were observed for RI lines indicating quantitative inheritance. One to three QTLs affecting seed weight explained 17% to 41% of the phenotypic variation. Two to three QTLs for seed length explained 23% to 45% of the phenotypic variation. One to four QTL associated with seed height explained 17% to 39% of the phenotypic variation. A RAPD marker M5.850 in linkage group 3 was consistently associated with seed weight, seed length, and seed height in all experiments and explained 7% to 13% of the phenotypic variation for these traits. A seedcoat pattern morphological marker (C) in linkage group 1 was associated with seed weight and seed height in two greenhouse experiments.

scholarly journals Morphological Characteristics, Classifications and Difficulties in the Use of Diagnostic Criteria for Serrated Lesions of the Large Intestine

2021 ◽  
Author(s):  
Cesar de Souza Bastos Junior ◽  
Vera Lucia Nunes Pannain ◽  
Adriana Caroli-Bottino
Keyword(s):  
Diagnostic Criteria ◽  
Morphological Characteristics ◽  
World Health ◽  
Diagnostic Tools ◽  
Serrated Adenoma ◽  
The Past ◽  
The World ◽  
Serrated Lesions ◽  
Health Organization

Abstract Introduction Colorectal carcinoma (CRC) is the most common gastrointestinal neoplasm in the world, accounting for 15% of cancer-related deaths. This condition is related to different molecular pathways, among them the recently described serrated pathway, whose characteristic entities, serrated lesions, have undergone important changes in their names and diagnostic criteria in the past thirty years. The multiplicity of denominations and criteria over the last years may be responsible for the low interobserver concordance (IOC) described in the literature. Objectives The present study aims to describe the evolution in classification of serrated lesions, based on the last three publications of the World Health Organization (WHO) and the reproducibility of these criteria by pathologists, based on the evaluation of the IOC. Methods A search was conducted in the PubMed, ResearchGate and Portal Capes databases, with the following terms: sessile serrated lesion; serrated lesions; serrated adenoma; interobserver concordance; and reproducibility. Articles published since 1990 were researched. Results and Discussion The classification of serrated lesions in the past thirty years showed different denominations and diagnostic criteria. The reproducibility and IOC of these criteria in the literature, based on the kappa coefficient, varied in most studies, from very poor to moderate. Conclusions Interobserver concordance and the reproducibility of microscopic criteria may represent a limitation for the diagnosis and appropriate management of these lesions. It is necessary to investigate diagnostic tools to improve the performance of the pathologist's evaluation, for better concordance, and, consequently, adequate diagnosis and treatment.

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