Variation among Australian accessions of Vigna vexillata for traits of agronomic, adaptive, or taxonomic interest

2003 ◽  
Vol 54 (3) ◽  
pp. 243 ◽  
Author(s):  
T. Grant ◽  
R. J. Lawn ◽  
L. M. Bielig
Keyword(s):  
Vegetative Growth ◽  
Significant Variation ◽  
Quantitative Traits ◽  
Biomass Accumulation ◽  
Adaptive Significance ◽  
Geographical Range ◽  
Seed Traits ◽  
Potted Plants ◽  
Vigna Vexillata ◽  
Tuber Morphology

Variation among 79 accessions of Vigna vexillata was evaluated for a range of traits of potential agronomic, taxonomic, or adaptive significance, using potted plants grown in the glasshouse over summer. There was significant variation among accessions for all of the traits evaluated except for tuber morphology. The nature and extent of variation are likely to be of agronomic interest in a plant improvement context. Variation among accessions for quantitatively inherited traits relating to phenology, biomass accumulation (vegetative growth, seeds, and tubers), and pod and seed traits was, in most instances, normally distributed, with no evidence of large discontinuities in response. There was evidence of photoperiodic adaptation among accessions from different latitudes and some interrelations between quantitative traits, for which there were usually plausible physiological explanations. Among the several qualitative traits evaluated, there was evidence of minor linkages between some alleles. There was no evidence of major discontinuities in the observed variation, and no evidence of aggregations of traits into distinctive or geographically discrete morphotypes. It is concluded that V. vexillata is relatively homogeneous across the wide geographical range over which it occurs within Australia.

scholarly journals Multivariate analysis of quantitative traits can effectively classify rapeseed germplasm

Genetika ◽  
2014 ◽  
Vol 46 (2) ◽  
pp. 545-559 ◽  
Author(s):  
Mirjana Jankulovska ◽  
Sonja Ivanovska ◽  
Ana Marjanovic-Jeromela ◽  
Snjezana Bolaric ◽  
Ljupcho Jankuloski ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Vegetative Growth ◽  
Quantitative Traits ◽  
Principal Component ◽  
Breeding Program ◽  
Oil Yield ◽  
Growth Duration ◽  
Data Set ◽  
Combined Application ◽  
Selection Of

In this study, the use of different multivariate approaches to classify rapeseed genotypes based on quantitative traits has been presented. Tree regression analysis, PCA analysis and two-way cluster analysis were applied in order todescribe and understand the extent of genetic variability in spring rapeseed genotype by trait data. The traits which highly influenced seed and oil yield in rapeseed were successfully identified by the tree regression analysis. Principal predictor for both response variables was number of pods per plant (NP). NP and 1000 seed weight could help in the selection of high yielding genotypes. High values for both traits and oil content could lead to high oil yielding genotypes. These traits may serve as indirect selection criteria and can lead to improvement of seed and oil yield in rapeseed. Quantitative traits that explained most of the variability in the studied germplasm were classified using principal component analysis. In this data set, five PCs were identified, out of which the first three PCs explained 63% of the total variance. It helped in facilitating the choice of variables based on which the genotypes? clustering could be performed. The two-way cluster analysissimultaneously clustered genotypes and quantitative traits. The final number of clusters was determined using bootstrapping technique. This approach provided clear overview on the variability of the analyzed genotypes. The genotypes that have similar performance regarding the traits included in this study can be easily detected on the heatmap. Genotypes grouped in the clusters 1 and 8 had high values for seed and oil yield, and relatively short vegetative growth duration period and those in cluster 9, combined moderate to low values for vegetative growth duration and moderate to high seed and oil yield. These genotypes should be further exploited and implemented in the rapeseed breeding program. The combined application of these multivariate methods can assist in deciding how, and based on which traits to select the genotypes, especially in early generations, at the beginning of a breeding program.

ROSETTE VEGETATIVE GROWTH OF LOWBUSH BLUEBERRY RELATED TO FREEZING TEMPERATURES

1988 ◽  
Vol 68 (2) ◽  
pp. 549-551 ◽  
Author(s):  
I. V. HALL ◽  
P. D. HILDEBRAND
Keyword(s):  
Low Temperature ◽  
Vegetative Growth ◽  
Leaf Expansion ◽  
Stages Of Development ◽  
Vaccinium Angustifolium ◽  
Potted Plants ◽  
Vegetative Buds ◽  
Lowbush Blueberry ◽  
Freezing Temperatures ◽  
Natural Stands

When potted plants of lowbush blueberries were subjected to temperatures of −2 °C for periods of 0.5–4.0 h, a rosette of leaves arising from vegetative buds was induced similar to that observed in natural stands of Vaccinium angustifolium Ait. Vegetative buds at various stages of development from green tip (2 mm) to the point of leaf expansion were equally susceptible to the low temperature injury. Variation in susceptibility among seven clones tested (Brunswick, 71–14, ME-3, NB3, 895, 752, and 694) was not observed.Key words: Lowbush blueberry, low-temperature injury

scholarly journals Effect of Different Substrate on Growth of African Violet (Saintpauila ionantha) Grown in Greenhouse Conditions

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 657c-657
Author(s):  
M. Arias-Gonzalez ◽  
J. Farias ◽  
S. Guzman ◽  
A. Michel
Keyword(s):  
Experimental Design ◽  
Vegetative Growth ◽  
High Capacity ◽  
Peat Moss ◽  
Leaf Color ◽  
Potted Plants ◽  
African Violet ◽  
Black Clay ◽  
Randomized Experimental Design ◽  
Compost Soil

Our purpose was to evaluate the vegetative growth and flowering of African violet (Saintpauila ionantha) grown in seven soils subtrates under greenhouse conditions. The following were tested: river lime, pine ushers, black clay, oak soil, peatmoss, Canadian peatmoss, and a compost soil. Pots were in a fully randomized experimental design with seven treatments, and four replications was used. A monthly 10N–20P–10K fertilization was applied to potted plants. The study lasted for 135 days, taking data every 15 days on leaf perimeter, length and elasticity of the petiole, plant height, and leaf color. Best vegetative growth was observed with oak and canadian peat moss due to their high capacity to hold water and their very good aeration. Least vegetative growth was observed with black clay, where plants failed to flower. Other substrates did not show differences in plant growth.

scholarly journals Genetic diversity of Ethiopian cocoyam (Xanthosoma sagittifolium (L.) Schott) accessions as revealed by morphological traits and SSR markers

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0245120
Author(s):  
Eyasu Wada ◽  
Tileye Feyissa ◽  
Kassahun Tesfaye ◽  
Zemede Asfaw ◽  
Daniel Potter
Keyword(s):  
Genetic Diversity ◽  
Ssr Markers ◽  
Significant Variation ◽  
Morphological Traits ◽  
Quantitative Traits ◽  
Taxonomic Status ◽  
High Genetic Diversity ◽  
Xanthosoma Sagittifolium ◽  
Ssr Loci ◽  
Multiple Routes

Cocoyam (Xanthosoma sagittifolium (L.) Schott) is an exotic species from tropical America that is widely cultivated in Ethiopia for its edible cormels and leaves. There is a dearth of information on the genetic diversity of Ethiopian cocoyam. In order to evaluate and select cocoyam germplasm for breeding and conservation, genetic diversity of 100 Ethiopian cocoyam accessions (65 green- and 35 purple- cocoyam) were analyzed using 29 morphological traits (16 qualitative and 13 quantitative) and 12 SSR loci. Two classes of qualitative traits were observed. ANOVA revealed significant variation in 11 (84.6%) of the 13 studied quantitative traits. The SSR marker analysis showed high genetic diversity. A total of 36 alleles were detected with a range of 2 to 5 (average of 3.273) alleles per locus. The average observed heterozygosity (Ho) and expected heterozygosity (He) values across populations were 0.503 and 0.443, respectively. The analysis of molecular variance showed that the variation among populations, among individuals within populations, and within individuals explained 14%, 18%, and 68% of the total variation, respectively. Cluster analysis grouped the accessions irrespective of the collection sites. A dendrogram based on Nei’s standard genetic distance grouped the green cocoyam accessions together while the purple cocoyam accessions occupied a separate position within the dendrogram. Significant variation in quantitative traits and the high level of genetic diversity revealed by the SSR markers suggest that diverse cocoyam accessions, probably with multiple lineage, were introduced multiple times, through multiple routes and probably by multiple agents, an hypothesis that needs futher testing and analyis. The crop, therefore, needs more research efforts commensurate with its economic and social values than it has been accorded thus far. Further study is recommended to clarify the taxonomic status of Ethiopian cocoyam accesions and to trace their evolutionary relationships with Xanthosoma species elsewhere.

Extreme pH Reduced Vegetative Growth and Biomass Accumulation in Alfalfa

2019 ◽  
Vol 39 (3) ◽  
pp. 148-152
Author(s):  
Ki-Won Lee ◽  
Sang-Hoon Lee ◽  
Yowook Song ◽  
Hee Jung Ji ◽  
Ki-Yong Kim ◽  
...  
Keyword(s):  
Vegetative Growth ◽  
Biomass Accumulation

scholarly journals Some details and effects of the premeiotic controls of recombination frequencies in Neurospora crossa

1971 ◽  
Vol 18 (3) ◽  
pp. 255-264 ◽  
Author(s):  
B. C. Lamb
Keyword(s):  
Constant Temperature ◽  
Mating Type ◽  
Meiotic Recombination ◽  
Vegetative Growth ◽  
Adaptive Significance ◽  
Opposite Mating Type ◽  
Reciprocal Crosses ◽  
Temperature Regimes ◽  
Single Constant ◽  
Made In

SUMMARYRecombination data from crosses made at a single constant temperature of incubation were compared with those from crosses transferred to a different temperature at either the time of conidiation of protoperithecia by the strain of opposite mating-type, or after fertilization when crozier stages were first visible. Results were also compared from reciprocal crosses, from crosses made in different ways and from crosses in which protoperithecia were conidiated at different stages of maturity.Different temperature regimes during vegetative growth and proto-perithecial development had highly significant effects on subsequent meiotic recombination, while temperature differences during later premeiotic stages (between conidiation of protoperithecia and the crozier stage) had no or little effect. It was found that premeiotic controls could have as great, or greater, effects on meiotic recombination than those operating directly during meiosis. The possible adaptive significance of this is discussed.Recombination frequencies were affected by the method of making a cross (joint-inoculation of strains of opposite mating-type, or conidiation of protoperithecia), and by protoperithecial age at the time of conidiation by the opposite mating-type. Differences in recombination between reciprocal crosses were obtained and were dependent on temperature of incubation and age of protoperithecia at the time of conidiation. Recombination was not affected by different lysine concentrations in the medium. Genetic differences in premeiotic effector-production between the strains used were inferred.

scholarly journals Variation and its distribution in wild cacao populations from the Brazilian Amazon

2003 ◽  
Vol 46 (4) ◽  
pp. 507-514 ◽  
Author(s):  
Luiz Antônio dos Santos Dias ◽  
Júlio Pontes Barriga ◽  
Paulo Yoshio Kageyama ◽  
Caio Márcio Vasconcellos Cordeiro de Almeida
Keyword(s):  
Multivariate Analysis ◽  
Genetic Structure ◽  
Significant Variation ◽  
Brazilian Amazon ◽  
River Basins ◽  
Collection Management ◽  
Gene Conservation ◽  
Seed Traits ◽  
Univariate Analyses ◽  
Insight Into

A sample of 64 progenies (320 cacao trees as a whole) from four Brazilian Amazon basins was collected and evaluated on the basis of 15 fruit and seed traits. Nested univariate analyses of variance showed significant variation across progenies and basins. However, most of the variability appeared to be due to among trees and basins differences. The multivariate analysis showed that the differentiation in cacao populations occurred among basins. Since cacao diversity was predominantly found in trees within basins and among basins, one should optimize the collecting process by taking as many trees as possible starting from few progenies and many river basins. These findings seemed to validate gene conservation efforts made to date to preserve the cacao genetic resources and provide insight into the cacao genetic structure aiming cacao collection, management and improvement.

Sign in / Sign up

Export Citation Format

Share Document