scholarly journals Genetic Variability and Association Among Agronomic Characters in Selected Field Pea (<i>Pisumsativum L.</i>) Genotypes at Bale Zone, Sinana Research Center, Oromia Region, Ethiopia

2017 ◽  
Vol 5 (6) ◽  
pp. 63
Author(s):  
Benti Ofga
Keyword(s):  
Genetic Variability ◽  
Field Pea ◽  
Research Center ◽  
Agronomic Characters ◽  
Bale Zone

Assessment of Genetic Variability and Relationship between Different Quantitative Traits in Field Pea (Pisum sativum var. arvense) Germplasm

2021 ◽  
Author(s):  
Vijay Pratap ◽  
Vijay Sharma ◽  
Kamaluddin . ◽  
Gaurav Shukla
Keyword(s):  
Genetic Variability ◽  
Correlation Coefficient ◽  
Seed Yield ◽  
Harvest Index ◽  
Quantitative Traits ◽  
Field Pea ◽  
Path Coefficient ◽  
Genetic Advance ◽  
Path Coefficient Analysis ◽  
Biological Yield

Background: Assessment of genetic variability and inter-relationship between the characters can be used in the breeding programme to evolve new varieties with wide genetic diversity to maximize the yield potential in crop improvement programmes. Eighty-four field pea genotypes were evaluated in an augmented block design for thirteen quantitative traits to study variance components, heritability, genetic advance and inter-relationship between the yield and yield contributing traits. Methods: The extent of phenotypic and genotypic variation that exist in a character was calculated by the formula suggested by Burton and de Vane (1953). Heritability in broad sense and genetic advance as per cent of mean for each character was computed using the formula suggested by Hanson et al. (1956) and Johnson et al. (1955), respectively. Correlation coefficient was calculated by method suggested by Searle (1961) and path coefficient analysis done as per method of Wright (1921) and elaborated by Dewey and Lu (1959).Result: Significant differences observed among the genotypes tested for the yield characters indicated the presence of variability. High heritability coupled with high genetic advance as percent of mean was observed for the traits viz., plant height, effective pods plant-1, harvest index and seed yield plant-1 were governed by additive gene effects which will aid in effective selection. Correlation coefficient analysis revealed that seed yield plant-1 had highly significant and positive correlation with biological yield plant-1, effective pods plant-1, harvest index, seeds pods-1 and effective nodes plant-1, indicating that these traits are strongly associated with seed yield in field pea. Path coefficient analysis identified biological yield plant-1 followed by harvest index, seed pod-1, effective nodes plant-1, 100-seed weight and day to 50% flowering as highly desirable components with great direct effects on seed yield. 

scholarly journals Morphological and agronomical characterization and estimates of genetic parameters of sesbania Scop. (Leguminosae) accessions

1999 ◽  
Vol 22 (1) ◽  
pp. 81-93 ◽  
Author(s):  
E.A. Veasey ◽  
E.A. Schammass ◽  
R. Vencovsky ◽  
P.S. Martins ◽  
G. Bandel
Keyword(s):  
Genetic Variability ◽  
Genetic Parameters ◽  
Block Design ◽  
Soil Improvement ◽  
Morphological Characters ◽  
Wood Products ◽  
Agronomic Characters ◽  
Legume Plant ◽  
Biomass Yields ◽  
Superior Genotypes

Twenty-two accessions of seven Sesbania (Leguminosae) species: S. emerus, S. rostrata, S. tetraptera, S. exasperata (annuals), S. grandiflora, S. sesban and S. virgata (perennials), used for ruminant fodder, firewood, wood products, soil improvement, and human food, were investigated, with the aim of characterizing both inter- and intraspecific genetic variability, estimating genetic parameters for the characters evaluated and appraising the forage potential of the accessions. These were planted at the Instituto de Zootecnia, Nova Odessa, SP, Brazil, in a randomized complete block design with 22 treatments and four replications. Seventeen morphological and 17 agronomic characters were evaluated. Genetic parameters coefficient of intraspecific genetic diversity (bi) and coefficient of intraspecific genetic variation (CVgi) were obtained for the species represented by more than one accession. Highly significant differences were observed among as well as within species for most characters, showing considerable genetic variability. S. exasperata showed intraspecific genetic variability for the largest number of morphological characters. The same was observed for S. sesban for the agronomic characters. Most of the characters gave high bi values, above 0.80, indicating the possibility of selecting superior genotypes. The CVgi values, on the other hand, which indicate the magnitude of the existing genetic variability relative to the character mean, varied according to the species and character evaluated. Differences between annual and perennial species were observed, with higher biomass yields presented by the annuals at the first cut and by the perennials after the second cut, reaching the highest yield at the third cut. The annual species had higher seed production. Accession NO 934 of S. sesban gave the highest biomass yields and regrowth vigor, showing promise as a forage legume plant.

scholarly journals Genetic Variability, Heritability, and Genotypic Correlation of Soybean Agronomic Characters

2021 ◽  
Vol 19 (2) ◽  
pp. 117
Author(s):  
Heru Kuswantoro ◽  
Moch Muchlish Adie ◽  
Pratanti Haksiwi Putri
Keyword(s):  
Genetic Variability ◽  
Plant Height ◽  
Seed Yield ◽  
Seed Weight ◽  
Genetic Parameters ◽  
Genotypic Correlation ◽  
Agronomic Characters ◽  
Days To Maturity ◽  
100 Seed Weight ◽  
Number Of Branches

<p>Genetic parameters are important in genetic improvement and variety development. This study aimed to determine the effective characters that can be applied as selection criterion in soybean breeding using genetic parameters. About 100 soybean genotypes were grown in the Muneng Agricultural Technology Research and Assessment Installation from April to July 2020. The trial was conducted using a randomized complete block design. The results showed that high genetic variability was found on days to maturity, number of branches per plant, number of productive nodes per plant, 100-seed weight, and seed yield. The high heritability was shown by days to maturity, plant height, number of branches per plant, and 100-seed weight. All phenotypic correlations were significant, except for the correlation between seed yield and days to maturity, plant height, number of branches, and number of productive nodes. The seed yield had no genotypic correlation with all agronomic characters observed. The genotypic correlation was only significant for plant height and number of productive nodes, number of branches and number of filled pods, as well as number of productive nodes and 100-seed weight. Therefore, the improvement of seed yield can be conducted through direct selection using the seed yield parameter or indirectly using the 100-seed weight.<br /><br /></p>

Genetic stability of Australian Phalaris (Phalaris tuberosa L.) under domestication

1971 ◽  
Vol 22 (6) ◽  
pp. 895 ◽  
Author(s):  
JR McWilliam ◽  
HE Schroeder ◽  
DR Marshall ◽  
RN Oram
Keyword(s):  
Natural Selection ◽  
Genetic Variability ◽  
Natural Regeneration ◽  
Ancestral Population ◽  
Agronomic Characters ◽  
Apparent Lack ◽  
Ecotypic Differentiation ◽  
Eastern Australia ◽  
Controlled Environments ◽  
Italian Origin

Thirty isolates of the Australian cultivar of phalaris (Phalaris tubevosa), sampled over the range of its distribution in south-eastern Australia, were evaluated as seeds and seedlings in controlled environments and as spaced plants and swards in the field. The variation found within and between the populations for a number of morphological, developmental, chemical, and agronomic characters indicates that the species has undergone little, if any, ecotypic differentiation during almost 90 years of cultivation in Australia. The results also indicate that the cultivar was derived from a single ancestral population of P. tuberosa and are consistent with the earlier claims that this population was of Italian origin. The evolutionary conservatism and the apparent lack of ecological adaptation in the cultivar are not due to a lack of genetic variability, but rather to the longevity and adaptability of individual plants, and the absence of natural regeneration in established stands, all of which have reduced the scope of natural selection.

Genetic Variability of Seed Yield and Agronomic Characters in Festuca Hybrids and Amphiploids

Crop Science ◽  
1991 ◽  
Vol 31 (1) ◽  
pp. 56-60 ◽  
Author(s):  
D. M. Burner ◽  
G. C. Eizenga ◽  
R. C. Buckner ◽  
P. B. Burrus
Keyword(s):  
Genetic Variability ◽  
Seed Yield ◽  
Agronomic Characters

scholarly journals Pre-extension demonstration of field pea varieties in selected districts of Bale highlands, Oromiya national regional state, Ethiopia

2022 ◽  
Vol 8 (3) ◽  
pp. 267-271
Author(s):  
Bayeta Gadissa ◽  
Amare Biftu ◽  
Ayalew Sida
Keyword(s):  
Group Discussion ◽  
Scaling Up ◽  
Field Pea ◽  
Descriptive Statistics ◽  
Average Yield ◽  
Ranking Methods ◽  
Fertilizer Rate ◽  
Yield Data ◽  
Bale Zone ◽  
Better Than

Pre extension demonstration of improved field pea varieties was conducted in Goba, Sinana and Agarfa districts of Bale zone. The main objective of the study was to demonstrate and evaluate recently released (Weyib) variety along with standard check. The demonstration was under taken on single plot of 10mx10m area for each variety with the spacing of 30cm between rows and recommended seed rate of 75kg/ha and fertilizer rate of 100kg/ha NPS. Mini-field day involving different stakeholders was organized at each respective site. Yield data per plot was recorded and analysed using descriptive statistics, while farmers’ preference to the demonstrated varieties was identified using focused group discussion and summarized using pair wise ranking methods. The demonstration result revealed that Weyib variety performed better than the standard check (Tulu shanan variety) with an average yield of 34.47qt/ha, while that of the standard check was27.26qt/ha. Weyib variety had 17.27% yield advantage over the standard check. Thus, Weyib variety was recommended for further scaling up. Res. Agric., Livest. Fish.8(3): 267-271, December 2021

scholarly journals Assessment of genetic variability in different kenaf (Hibiscus cannabinus) germplasm using morpho-agronomic traits

2020 ◽  
pp. 5-12
Author(s):  
Arju Miah ◽  
A. K. M. Shahadat Hossain ◽  
Nihar Ranjan Saha ◽  
Md. S. M. Shahriar Parvej ◽  
Md. Younus Ali ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Agronomic Traits ◽  
Hibiscus Cannabinus ◽  
Agronomic Characters ◽  
Base Diameter ◽  
Effective Utilization ◽  
Varietal Identification ◽  
Superior Genotypes ◽  
Stem Colour ◽  
Better Than

Kenaf (Hibiscus cannabinus L.) is a fiber crop classified in the genus Hibiscus (Malvaceae), and has a great potential for its multipurpose utilization, in addition to its traditional usage. Varietal identification of kenaf is always problematic and knowledge on genetic variability of kenaf varieties is also limited, which significantly hindered our effective utilization and conservation of the valuable kenaf germplasm. In order to find a proper method for identifying kenaf varieties and studying their variation, morpho-agronomic characters were analyzed. Fifty eight accessions of kenaf germplasm collected from Gene Bank Department of Bangladesh Jute Research Institute were characterized at Jute Agriculture Experiment Station, Manikganj during April 2014 to December 2014. The accessions were characterized for fifteen morpho-agronomic attributes as per Hibiscus descriptor in order to select superior genotypes for the genetic improvement of kenaf. Considerable ranges of variability were observed in stem colour, petiole colour, plant height, base diameter, dry fibre weight, dry core weight, green weight with leaves and green weight without leaves. Based on major yield contributing characters accessions 1653, 3384, 3928 and 4202 performed better than the control varieties HC-2 and HC-95.

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