scholarly journals Leaf architecture of Rubiaceae Juss. from caatinga vegetation in Brazil

2018 ◽  
Vol 19 (1) ◽  
Author(s):  
Mirella Priscila de Souza Lima ◽  
Adriana Soares ◽  
José Lucas Ribeiro de Sousa ◽  
Márcia Santos Carvalho ◽  
Jorge Marcelo Padovani Porto ◽  
...  
Keyword(s):  
Reproductive Traits ◽  
Leaf Architecture ◽  
Leaf Venation ◽  
Caatinga Vegetation ◽  
Taxonomic Groups ◽  
Fifth Order ◽  
Comprehensive Studies

Abstract: The study and characterization of leaf venation plays a key role in the recognition of taxonomic groups that have been identified mainly based on reproductive traits. This study aimed at characterizing the pattern of leaf venation of Rubiaceae, recognizing individual characters among the taxa of this group and testing the use of leaf architecture as a taxonomic tool capable of providing vegetative and diagnostically characteristics between species. Leaves of 14 species distributed in eight genera from Rubiaceae were diaphanized and classified. The study area is located in Área de Proteção Ambiental Serra Branca/Raso da Catarina, Bahia State, Brazil. The characterization of secondary veins, including type, spacing and number of pairs, third veining patterns, fourth and fifth order, and the conformation of the areola were useful to delimit taxa when used together, providing subsidies to more comprehensive studies.

Foliar architecture of some members of the tribe Senecioneae (Asteraceae) with a key for identification of the Mexican genera

Phytotaxa ◽  
2018 ◽  
Vol 364 (2) ◽  
pp. 136
Author(s):  
ALICIA ROJAS-LEAL ◽  
TERESA TERRAZAS ◽  
JOSÉ LUIS VILLASEÑOR
Keyword(s):  
Identification Key ◽  
Leaf Architecture ◽  
Leaf Venation ◽  
Generic Rank ◽  
Secretory Canals

The foliar architecture of 18 genera (Barkleyanthus, Digitacalia, Erechtites, Nelsonianthus, Packera, Pentacalia, Pippenalia, Pittocaulon, Psacaliopsis, Psacalium, Pseudogynoxys, Robinsonecio, Roldana, Senecio, Telanthophora, Tetradymia, Villasenoria and Werneria) of the tribe Senecioneae (Asteraceae) distributed in Mexico is described. The aim was to identify leaf characters to be used in the taxonomy and phylogenetics of the tribe, as well as a source to identify at the generic rank the genera distributed in Mexico. More than 400 specimens were revised and several leaves were cleared to analyze leaf venation patterns. Four patterns of primary venation (actinodromous suprabasal, paralelodromous, pinnate and radiate-palmate) and five patterns of secondary venation (brochidodromous, weak-brochidodromous, craspedodromous, mixed-craspedodromous and festooned-semi-craspedodromous) were identified. Terminal tracheids were observed only in veinlets of Pentacalia, Pseudogynoxys and Werneria. In addition, secretory canals and crystals occurred in several genera. Foliar architecture showed to be a useful tool to identify genera, an identification key based mostly on leaf architecture characters is provided.

Survey of relevant taxonomic groups for the design of qPCR primers and internal fluorescent probes for whole characterization of subaerial biofilm

2019 ◽  
Vol 69 (10) ◽  
pp. 1087-1096
Author(s):  
Angelo Del Mondo ◽  
Antonino De Natale ◽  
Gabriele Pinto ◽  
Antonino Pollio
Keyword(s):  
Fluorescent Probes ◽  
Taxonomic Groups

Families of repeated DNA in the oomycete Phytophthora infestans and their distribution within the genus

Genome ◽  
1998 ◽  
Vol 41 (4) ◽  
pp. 605-615 ◽  
Author(s):  
Howard S Judelson ◽  
Thomas A Randall
Keyword(s):  
Reverse Transcriptase ◽  
Phytophthora Infestans ◽  
Repetitive Sequences ◽  
Nuclear Genome ◽  
Repeated Sequences ◽  
Close Relative ◽  
Repeat Elements ◽  
Copy Numbers ◽  
Taxonomic Groups

The abundance, genomic organization, species distribution, and structure of 33 distinct families of repetitive DNA in Phytophthora are described. The families were identified by screening a library of Phytophthora infestans DNA for repetitive sequences. These were subsequently characterized within 26 species distributed within each of the six taxonomic groups traditionally defined within the genus. Some repeat elements were specific to P. infestans and its close relative, Phytophthora mirabilis, while other repeated sequences were present in most species. The distribution of the DNA families did not conform to the traditional taxonomic groups used for the genus. Characterization of the repeated sequences in P. infestans indicated that they included both dispersed and tandemly repeated elements, with copy numbers ranging from 70 to 8400 per haploid genome. In total, these repeats were estimated to represent 51% of the nuclear genome of P. infestans. Reverse transcriptase motifs were detected in seven of the repeat families that were widely distributed throughout the genus.Key words: chromosome structure, genome evolution, speciation, reverse transcriptase, transposable element.

Genetic characterization of three Iranian native buffalo populations (Khozestani, Azari and Mazandarani) using microsatellite markers

2005 ◽  
Vol 2005 ◽  
pp. 128-128
Author(s):  
S. Z. Mirhosseini ◽  
S. M. F. Vahidi
Keyword(s):  
Genetic Diversity ◽  
Developing Countries ◽  
Microsatellite Markers ◽  
Reproductive Traits ◽  
Lower Productivity ◽  
Genetic Abnormalities ◽  
Conservation Of Genetic Resources ◽  
Animal Resources ◽  
Great Danger

Biodiversity among domesticated animals in developing countries is enormous. However, due to introduction of superior animal breeds with excellent performance, the native animal resources with good adaptability but lower productivity are in great danger. The list of extinct local breeds and deteriorated remaining ones are becoming longer every year. Erosion of genetic diversity in a breed may cause increase in the rate of inbreeding and genetic abnormalities thereby decrease in animal performance, particularly for reproductive traits. These will virtually reduce the global gene pool for future development and can be considered as a serious threat for universal food security. Therefore the urgency and need to conservation of genetic resources in animal biodiversity is clear particularly for those in the developing countries (Hall, et al. 1995). Buffalo play an important role in animal production in some province of Iran. Present study follow to evaluate the genetic diversity and existing relationship among three Iranian native buffalo populations by using microsatellite markers.

Characterization of the productive performance of Highlander sheep in Southern Chile. II. Male reproductive traits

2015 ◽  
Vol 130 ◽  
pp. 189-192
Author(s):  
José F. Cox ◽  
Eduardo Jeria ◽  
Antonio Bocic ◽  
Nelson Vera ◽  
Ricardo Soto-Saravia ◽  
...  
Keyword(s):  
Reproductive Traits ◽  
Productive Performance ◽  
Southern Chile

Overview of the Morphology of Neotropical Termite Workers: History and Practice

Sociobiology ◽  
2019 ◽  
Vol 66 (1) ◽  
pp. 1 ◽  
Author(s):  
Mauricio M Rocha ◽  
Carolina Cuezzo ◽  
Joice Paulo Constantini ◽  
Danilo Elias Oliveira ◽  
Rafaella Gregório Santos ◽  
...  
Keyword(s):  
Neotropical Region ◽  
Present Knowledge ◽  
Morphological Features ◽  
Future Research ◽  
Origin And Evolution ◽  
Taxonomic Groups ◽  
Worker Caste

This contribution deals with the worker caste of the Neotropical termite fauna. It is a compilation of present knowledge about the morphology of pseudergates and workers, including the literature discussing the origin and evolution of this caste, the terminology used in the different taxonomic groups, and the techniques used to study these individuals, especially examination of the gut, mandibles, legs, and nota. In order to assist in identifying workers, it includes a key for the families that occur in the Neotropical Region and a characterization of workers of all families, especially the subfamilies of Termitidae, with descriptions and illustrations of diagnostic morphological features of genera. We point out advances and gaps in knowledge, as well as directions for future research.

Characterization of the productive performance of Highlander sheep in Southern Chile. I. Female reproductive traits

2015 ◽  
Vol 130 ◽  
pp. 183-188 ◽  
Author(s):  
José F. Cox ◽  
Eduardo Jeria ◽  
Antonio Bocic ◽  
Ricardo Soto-Saravia ◽  
Jesús Dorado ◽  
...  
Keyword(s):  
Reproductive Traits ◽  
Productive Performance ◽  
Southern Chile ◽  
Female Reproductive Traits

scholarly journals Distinctness, Uniformity and Stability (DUS) Characterization of Neolamarckia Cadamba Genetic Resources

2019 ◽  
Vol 7 (2) ◽  
pp. 268-275
Author(s):  
R. Thirunirai Selvan ◽  
K. T. Parthiban ◽  
B. Palanikumaran
Keyword(s):  
Genetic Resources ◽  
Leaf Shape ◽  
Morphological Characters ◽  
Leaf Length ◽  
Leaf Margin ◽  
Leaf Venation ◽  
Leaf Petiole ◽  
New Varieties ◽  
Bark Texture

Neolamarckia cadamba (Kadam) genetic resources were characterised Distinctness, Uniformity and Stability (DUS) traits based on International Union for the Protection of New Varieties of Plants12 guidelines. Twenty-five clones of kadam were characterised based on the morphological characters of leaf and bark with 12 descriptors. Among these 12 descriptors, 9 were qualitative traits viz., leaf shape, Leaf base shape, apex shape, leaf margin, leaf venation, base symmetry, Waxiness in upper side of leaf, bark colour and bark texture and 3 were quantitative characters viz., leaf length, leaf breath, leaf petiole length. The study exhibited significant variations among the genetic resources investigated for various DUS traits, which could act as reference traits for developing variety to protect the genetic resources through Intellectual Property Rights.

scholarly journals Descriptive characterization of a nigerian heterogeneous rabbit population - factors affecting litter traits.

2010 ◽  
Vol 18 (2) ◽  
pp. 111
Author(s):  
S.O. Oseni ◽  
B.A. Ajayi
Keyword(s):  
Litter Size ◽  
Reproductive Traits ◽  
Daily Weight Gain ◽  
Average Weight ◽  
Font Size ◽  
Factors Affecting ◽  
Litter Traits ◽  
Nigerian Population ◽  
Size At Birth

<span style="font-size: small;"><span style="font-size: 13px; line-height: 14px;">Thi study evaluated the effect of female body weight at conception (FWC), season of mating (SM), type of mating (TM) and litter size at birth (LSB) on the litter performance in a heterogeneous Nigerian population of rabbits. Data on 116 litters from 10 bucks and 48 does across three parities were analysed. Reproductive traits evaluated included LSB, number born alive (NBA), litter sizes and weights at 7, 14 and 21 d post-kindling, pre-weaning survival rate (SR) and daily weight gain of kits from kindling to weaning (DWG). A fi xed linear model that included FWC (light and heavy does), TM (homospermic and heterospermic matings), LSB classes (low, medium and large) and SM (rainy or dry) was used. Results showed that heavier does at concenption showed higher performance for LSB and NBA (P&lt;0.05) than lighter does. Average weight of kits at kindling and at 28 d, as well as kit SR and DWG, were signifi cantly higher in low-sized litters, when compared with intermediate- and large-sized litters (P&lt;0.05). LSB, NBA and litter size at weaning were higher in litters produced by heterospermically mated does compared with homospermically mated does. Season of mating affected LSB and NBA (P&lt;0.05), being signifi cantly larger the litters in the rainy season.</span></span>

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