Showing 5 results for Morphological Trait
Ghadir Ghorbanzadeh, Gholamreza Rafiee, Soheil Eagderi, Hadi Poorbagher, Iraj Efatpanah,
Volume 3, Issue 2 (9-2014)
Abstract
The early morphological development and allometric growth pattern of Caspian kutum (Rutilus frisii kutum) during early development (from 0-35 days post hatch=dph) was studied. Morphological data were obtained using ImageJ software from 2D pictures and allometric growth patterns were computed based on Log10 y = Log10 α + βLog x function. Based on inflexion point of morphological traits and body shape changes, the early developmental of kutum were divided into Eleuthero-embryo, Propterygio-larval, Pterygio-larval” and younger juvenile phases, each of which included vital developmental events. Rapid and intense changes occurred during Eleuthero-embryo and Propterygio-larvae stages such as development of gills, depletion of yolk-sac and exogenous feeding, development of feeding apparatus, sense organs and organs related to swimming performance. The results also revealed that developmental changes occurred in agreement with the inflexion points of morphological characters and their developmental priority imply on functional importance of feeding, respiration and swimming related structures.
Volume 9, Issue 1 (1-2018)
Abstract
Aims: The aim of the present study was to map the morphological traits in Iranian Basil accessions (Oscillum Oscillos) by Inter Simple Sequence Repeats (ISSRs) markers.
Materials & Methods: In this experimental study, 50 Iranian basil accessions from different geographical regions were used and the experiment was based on a completely randomized design. Extracting DNA and PCR was performed with 12 ISSR primers for Basil accessions. Components of variance, general heritability, and genetic and phenotypic variation coefficients were calculated by formula. Bayesian method, linear mixed model as well as Minitab 17, DARwin 5, Structure 2.3.3, Tassel 3, and SPSS 20 software were used. Findings: There was a positive correlation between the majority of traits for basil accessions. The highest coefficient of genetic variation was observed in stem diameter and internode length and the lowest was observed in flower number. Heritability varied between 3.63% and 94.24%. Foutrteen loci with 7 traits were recognized. The range of phenotypic changes varied from 3% to 29%. The highest number of locus was obtained for stem diameter traits and the lowest was obtained for lateral branch number. Six loci were specifically associated with only one trait and other loci were common in traits. The phenotypic variation varied between 17% and 29%.
Conclusion: Traits have a wide variety in Basil accessions and there is a positive correlation between the majority of them. The heritability of the traits varies from 3.63% to 94.24% and the range of the phenotypic changes varies from 3% to 29%. The highest number is for stem diameter traits and lowest is for lateral branch number. Six loci are specifically associated with only one trait and other loci are common in traits. The phenotypic variation varies between 29% ‐17%.
Volume 19, Issue 2 (3-2017)
Abstract
The species of Dioscorea (yam) are regarded as a staple food crop for millions of people in the tropical and subtropical regions of the world. It is regarded as an important food crop next to cereals and grains due to high yield storage of carbohydrates. Economically, only few species are recognized for cultivation from agricultural point of view, in spite of its large species diversity. The species of Dioscorea also represents great morphological variability in nature. However, very little research has been done on it. Hence, in the present study, an attempt was made to establish genetic variability and relationships among 50 accessions of Dioscorea spp. growing naturally in Meghalaya. Principal Component Analysis (PCA) for the first nine components indicates 91.5% observed variability. Morphological characters or traits with discriminating values were stem color, leaf type, number of leaflet in compound leaf, leaf color, leaf shape, inner petal shape, staminode absent or present, length and width of mature leaf. Agglomerative Hierarchical Cluster Analysis clearly separated the 50 accessions based on their close association.
Volume 23, Issue 3 (5-2021)
Abstract
Ziziphora clinopodioides Lam., a medicinal plant of Lamiaceae family, is a widespread species all over Iran. In this investigation, the genetic diversity of 10 ecotypes of Ziziphora clinopodioides was evaluated using morphological, phytochemical, and molecular markers. ISSR and iPBS markers were applied for the molecular analysis. The average of polymorphic bands per primer in the iPBS and ISSR markers were 4.4 and 6.68, with the average polymorphism of 79.49 and 92.03%, respectively. The ecotypes of Evard and Sorkhgarive had the highest values of the important breeding traits, including the shortest internode, the highest ratio of leaf to vegetative body weight, the highest essential oil yield, and the total phenol content. The results showed that ecotypes had a wide variation in terms of all studied markers. Principal Coordinate Analysis (PCoA) confirmed the results of molecular clustering of ecotypes, but phytochemical and morphological data did not have alignment with that. Also, there was no correspondence among the geographical locations of habitats and the phytochemical, morphological, and molecular markers data.
Volume 23, Issue 3 (5-2021)
Abstract
Beta vulgaris L. subsp. maritima (L.) Arcang., sea beet, is a morphologically and genetically variable species, belonging to beet primary gene-pool. This crop wild relative is a valuable genetic resource for resistance improvement in beets and could play an important role in crop yield sustainability. Eleven Madeiran sea beet populations were characterized using morphological descriptors and genetic markers. Our goal was to evaluate these populations as a potential source of valuable genetic material. Morphological characterization showed a high quantitative variation among populations. Plant height and inflorescence height parameters had the highest influence in the separation of populations. Molecular analysis was performed with polymorphic SSRs to determine genetic variability between populations. Both PCA and PCoA revealed three clusters that separated the populations according to morphological and genetic traits, respectively. This study contributes to the knowledge of sea beet diversity in Madeira’s archipelago and to the perception that the islands' specific environmental conditions influence its genetic variability, making these populations a possible gene source for sugar beet breeding programs
