Genetic Coefficient of Variance

2020 ◽  
pp. 1787-1791
Author(s):  
Benjamin Y. Cheung
Keyword(s):  
Genetic Coefficient

Pendugaan Parameter Genetik Kedelai Generasi F4 pada Intensitas Cahaya Rendah

Agrotek ◽  
2018 ◽  
Vol 2 (3) ◽  
Author(s):  
Yohanis Amos Mustamu ◽  
Trikoesoemaningtyas Trikoesoemaningtyas ◽  
Desta Wirnas ◽  
Didy Sopandie ◽  
Darman M. Arsyad
Keyword(s):  
Light Intensity ◽  
Genetic Parameter ◽  
Design Experiment ◽  
Low Light ◽  
Experimental Field ◽  
High Heritability ◽  
Intensity Condition ◽  
Augmented Design ◽  
Genetic Coefficient ◽  
The University

The objective of this study was to collect information on genetic parameter and agronomy character of soybean F4 generation in the low light intensity condition. The parameter was tested to 130 lines F4 which are produced by Balai Besar Pengkajian dan Pengembangan Teknologi Pertanian (BBP2TP) Boor and the genotype of Sibayak, Tegal, Tanggamus, and Argomulyo were used as controls. The experiment was conducted in the university�s experimental field in Cikabayan, from September to December 2007. A total of 130 advance (F4) soybean lines were evaluated under shading in an augmented design experiment. The result of this study showed that all character has low genetic coefficient. The weight character of 25 grains has a considerably high heritability number in low li

Genetic divergence, heritability and genetic advance in mutant lines of urdbean [Vigna mungo (L.) Hepper]

2017 ◽  
Author(s):  
Genetic Advance ◽  
Genetic Diversity ◽  
Heritability . ◽  
Urdbean .
Keyword(s):  
Vigna Mungo ◽  
Genetic Advance ◽  
Group I ◽  
Coefficient Of Variability ◽  
Additive Gene ◽  
Selection For ◽  
Mutant Lines ◽  
Genetic Coefficient ◽  
Moderate Magnitude ◽  
Number Of Branches

Twenty six mutant lines of urdbean [Vigna mungo (L) Hepper] were analyzed for genetic diversity using Mahalanobis D2 statistics. Based on twelve important agronomic characters, the genotypes were grouped into 4 clusters. Group I had maximum number of mutant lines (13) followed by II and III with 9 and 4 mutant lines respectively. Maximum intra cluster divergence was found for IV and inter cluster divergence was found between group II and IV. Presence of moderate magnitude of heritability in broad sense, genetic advance as percentage of mean, phenotypic and genetic coefficient of variability in respect of number of branches per plant, number of pods per plant, plant height and yield indicated ample scope for selection for superior mutants due to preponderance of additive gene action.

scholarly journals Pendugaan Parameter Genetik Vigor untuk Viabilitas dan Vigor Benih Cabai (Capsicum annuum L.) Menggunakan Analisis Setengah Dialel

2015 ◽  
Vol 6 (3) ◽  
pp. 144
Author(s):  
Luluk Prihastuti Ekowahyuni ◽  
M. Syukur ◽  
Surjono H. Sutjahjo ◽  
M. R. Suhartanto
Keyword(s):  
Combining Ability ◽  
Germination Rate ◽  
Accelerated Aging ◽  
Dry Weight ◽  
Seed Vigor ◽  
Specific Combining Ability ◽  
Narrow Sense Heritability ◽  
Reciprocal Effect ◽  
Genetic Coefficient ◽  
Positive Heterosis

<p>ABSTRACT</p><p><br />The purpose of this study was to estimate the narrow sense heritability (h2ns), broad sense heritability (h2bs), heterosis, and heterobioltiosis, coefficient of genetic variances, coefficient of phenotypic variances, additive and dominant variances. Pepper population used in this study consisted of IPB C2, IPB C9, IPB C10, IPB C15 and half diallel hybrid. To estimate the effect of reciprocal IPB C10 x IPB C2 hybrid was used. Accelerated aging method was used to test the vigor using methanol 20% in five periods of time 0, 2, 4, 6 and 8 hours. Observations consisted of: (1) germination rate, (2) the length of radicle, (3) the length of hypocotile, (4) dry weight of normal seedlings, (5) speed of growth, (6) electrical conductivity and (7) moisture content. Genetic parameters were estimated using affinity analysis. Reciprocal effect indicated that there was no maternal effect. Parents with high combining ability was IPB C15 and that with high specific combining ability was IPB C2 x IPB C5 and gave positive heterosis.</p><p>Key words: pepper, genetic coefficient, heterosis, seed vigor, specific combining ability</p><p> </p><p>ABSTRAK</p><p><br />Penelitian ini bertujuan menduga nilai parameter genetik untuk viabilitas dan vigor benih cabai menggunakan metode persilangan setengah dialel untuk mendapatkan informasi nilai<br />heritabilitas, heterosis, koefisien keragaman genetik, varians aditif dan dominan, sehingga diharapkan dapat mendukung keberhasilan program pemuliaan yang mengkombinasikan karakter tanaman dengan viabilitas dan vigor benih yang baik. Empat genotipe tetua cabai yang digunakan adalah IPB C2, IPB C9, IPB C10, IPB C15, dan enam genotipe cabai hasil persilangan antar tetua adalah IPB C2 x IPB C9, IPB C2 x IPB C10, IPB C2 x IPB C15, IPB C9 x IPB C10, IPB C9 x IPB C15, IPB C10 x IPB C15. Rancangan percobaan yang digunakan adalah Rancangan Kelompok Lengkap Teracak (RKLT). Pengamatan untuk pengujian vigor dan viabilitas dilakukan pada genotipe tetua dan persilangan dengan tolok ukur yaitu (1) daya berkecambah (2) panjang akar, (3) panjang hipokotil, (4) bobot kering kecambah (5) kadar air benih, (6) kecepatan tumbuh (Kct), dan (7) daya hantar listrik (DHL). Pengujian vigor daya simpan benih cabai pada genotipe tetua dan persilangan menggunakan metode pengusangan cepat methanol 20%. Setelah pengujian vigor daya simpan benih dilakukan analisis varian dan analisis regressi dan analisis statistik biometrik. Hasil analisis menunjukkan bahwa genotipe cabai IPB C15 mempunyai nilai daya gabung umum yang tinggi untuk vigor daya simpan benih sehingga dapat dijadikan sebagai tetua untuk perakitan varietas F1 hibrida vigor daya simpan benih tinggi. Kombinasi persilangan tetua IPB C2 x IPB C15 menghasilkan benih yang memiliki vigor daya simpan benih tinggi.</p><p>Kata kunci : cabai, daya gabung khusus, heterosis, koefisien genetik, vigor benih</p>

scholarly journals Parameter genetik kultivar-kultivar jagung local pada cekaman salinitas sedang

Jurnal Agro ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 55-67
Author(s):  
Sakka Bin Samudin ◽  
Jeki Moh. Adnan Khalik ◽  
Ruli Akbar ◽  
Muliati Muliati ◽  
Mustakin Mustakin
Keyword(s):  
Salinity Stress ◽  
Coefficient Of Variation ◽  
Genetic Parameters ◽  
Plant Traits ◽  
Genetic Advance ◽  
Maize Breeding ◽  
Green House ◽  
Moderate Salinity ◽  
Genetic Coefficient Of Variation ◽  
Genetic Coefficient

Produktivitas jagung di Sulawesi Tengah masih relatif rendah dibanding produksi nasional sehingga perlu ditingkatkan melalui pemuliaan tanaman. Penelitian bertujuan untuk mengkaji parameter genetik tanaman jagung pada cekaman salinitas sedang.  Penelitian dilaksanakan pada Juni sampai Agustus 2019, di Green House Fakultas Pertanian, Universitas Tadulako, Palu. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) terdiri atas 6 perlakuan genotip dan diulang 3 kali serta 5 unit tanaman per perlakuan sehingga terdapat 90 unit percobaan. Parameter genetik yang di analisis adalah koefisiean keragaman genotipik, koefisien keragaman fenotipik, heritabilitas, kemajuan genetik, korelasi, dan analisis sidik lintas. Hasil penelitian menunjukkan bahwa kehijauan daun, bobot tongkol berkelobot, berat tongkol tidak berkelobot, dan berat biji pertongkol memiliki koefisien keragaman genetik tinggi. Kehijauan daun, berat tongkol berkelobot, bobot tongkol tidak berkelobot, panjang tongkol tidak berkelobot, diamater tongkol, berat biji per tongkol dan bobot 100 biji memiliki nilai heritabilitas dan kemajuan genetik tinggi. Seleksi secara tidak langsung dapat dilakukan pada umur panen agar diperoleh hasil jagung lokal yang tinggi pada kondisi tercekam salinitas sedang. Karakter-karakter tersebut dapat dijadikan acuan dalam menyeleksi tanaman jagung dengan cekaman salinitas sedang untuk program pemuliaan jagung.AbstractThe productivity of maize in Central Sulawesi is relatively low compared to national production and needs to be improved by plant breeding. The study aimed to examine the genetic parameters of the maize plant traits at moderate salinity stress. The research was conducted from June to August 2019, at the Green House of the Faculty of Agriculture, Tadulako University, Palu. The genetic parameters analyzed were genetic coefficient of variation, phenotypic coefficient of variation, heritability, genetic advance, correlation, and path analysis. The experimental design used a completely randomized design consisting of six genotypic treatments and repeated three times. The results showed that the leaves greenness, the weight of the cob with and without husk, and weight of seeds per cob had a high genetic coefficient of variation. Leaf greenness, the weight of the ear with and without husk, ear length without husk, ear diameter, seed weight per ear and yield have a high value of heritability and genetic advance. Indirect selection can be applied through harvest time trait to obtain a high local maize yield in moderate salinity stress condition. These traits can be used as a reference in selecting maize plants with moderate salinity stress for maize breeding programs.

scholarly journals Parameter Genetik dan Deteksi Segregan Transgresif pada Populasi Kacang Tanah (Arachis hypogaea L.) Generasi F3

2017 ◽  
Vol 45 (2) ◽  
pp. 162 ◽  
Author(s):  
Siti Nurhidayah ◽  
Yudiwanti Wahyu ◽  
Dan Willy Bayuardi Suwarno
Keyword(s):  
Gene Action ◽  
Block Design ◽  
Continuous Distribution ◽  
High Yield ◽  
Arachis Hypogaea L ◽  
Additive Gene ◽  
High Heritability ◽  
Genetic Coefficient Of Variation ◽  
Transgressive Segregants ◽  
Genetic Coefficient

<p align="center"><strong>ABSTRACT</strong></p>Selection of transgressive segregants is considered as one effective way of obtaining peanut genotypes with high yield on early segregation. The objective of the study was to estimate genetic parameters and to identify transgressive segregants of peanut family in F3 generation. The experiment was conducted at Leuwikopo, Dramaga, Bogor on August-Desember 2014. The genetic materials evaluated were 218 family F3 generation from 5 biparental population (Jerapah/GWS79A1, GWS79A1/Zebra, GWS79A1/Jerapah, Zebra/GWS79A1 and Zebra/GWS18) and 4 commercial varieties as checks (Gajah, Jerapah, Sima, and Zebra). The experiment was conducted in an augmented randomized complete block design with 4 replications for the checks. The results showed that quantitative characters had continuous distribution and they were controlled by many genes with additive, dominance, complementary epistasis, or additive epistasis gene action. Total number of pod and number of pod had high heritability and moderate genetic coefficient of variation. Selection with 10% intensity showed that 22 families had large total number of pods while six families had larger total number of pods than both parents. Family U2-39 estimated was identified as a putative transgressive segregant with high total number of pod and had smaller variance within family than Sima variety. <br /><br />Keywords: additive,gene action, heritability, GCV

scholarly journals Comparing evolvability and variability of quantitative traits.

Genetics ◽  
1992 ◽  
Vol 130 (1) ◽  
pp. 195-204 ◽  
Author(s):  
D Houle
Keyword(s):  
Coefficient Of Variation ◽  
Stabilizing Selection ◽  
Phenotypic Variance ◽  
Weak Selection ◽  
Residual Variation ◽  
Coefficients Of Variation ◽  
Genetic Coefficient Of Variation ◽  
Environmental Events ◽  
Genetic Coefficient ◽  
Comparative Measure

Abstract There are two distinct reasons for making comparisons of genetic variation for quantitative characters. The first is to compare evolvabilities, or ability to respond to selection, and the second is to make inferences about the forces that maintain genetic variability. Measures of variation that are standardized by the trait mean, such as the additive genetic coefficient of variation, are appropriate for both purposes. Variation has usually been compared as narrow sense heritabilities, but this is almost always an inappropriate comparative measure of evolvability and variability. Coefficients of variation were calculated from 842 estimates of trait means, variances and heritabilities in the literature. Traits closely related to fitness have higher additive genetic and nongenetic variability by the coefficient of variation criterion than characters under weak selection. This is the reverse of the accepted conclusion based on comparisons of heritability. The low heritability of fitness components is best explained by their high residual variation. The high additive genetic and residual variability of fitness traits might be explained by the great number of genetic and environmental events they are affected by, or by a lack of stabilizing selection to reduce their phenotypic variance. Over one-third of the quantitative genetics papers reviewed did not report trait means or variances. Researchers should always report these statistics, so that measures of variation appropriate to a variety of situations may be calculated.

AN ANALYSIS OF HETEROSIS VS. INBREEDING EFFECTS WITH AN AUTOTETRAPLOID CROSS-FERTILIZED PLANT: MEDICAGO SATIVA L

Genetics ◽  
1984 ◽  
Vol 106 (1) ◽  
pp. 123-137
Author(s):  
A Gallais
Keyword(s):  
Major Part ◽  
Genetic Variance ◽  
Additive Model ◽  
Complex Character ◽  
Identity By Descent ◽  
A Genome ◽  
Self Fertilization ◽  
Medicago Sativa L ◽  
Nonallelic Interactions ◽  
Genetic Coefficient

ABSTRACT Self-fertilization and crossing were combined to produce a large number of levels of inbreeding and of degrees of kinship. The inbreeding effect increases with the complexity of the character and with its supposed relationship with fitness. A certain amount of heterozygosity appears to be necessary for the expression of variability. With crossing of unrelated noninbred plants, genetic variance is mainly additive, but with inbreeding its major part is nonadditive. High additivity in crossing, therefore, coexists with strong inbreeding depression. However, even in inbreeding the genetic coefficient of covariation among relatives appears to be strongly and linearly related to the classical coefficient of kinship. This means that deviations from the additive model with inbreeding could be partly due to an effect of inbreeding on variances through an effect on means. An attempt to analyze genetic effects from a theoretical model, based upon the identity by descent relationship at the level of means and of covariances between relatives, tends to show that allelic interactions are more important and nonallelic interactions are less important for a character closely related to fitness. For a complex character, these results lead to the conception of a genome organized in polygenic complementary blocks integrating epistasis and dominance. Some consequences for plant breeding are also discussed.

Variation for kernel number and related traits in triticale (x Triticosecale Wittmack)

2011 ◽  
Vol 62 (10) ◽  
pp. 823 ◽  
Author(s):  
Rosella Motzo ◽  
Simona Bassu ◽  
Francesco Giunta
Keyword(s):  
Genetic Variation ◽  
Genetic Correlations ◽  
Genotype By Environment Interaction ◽  
Unit Weight ◽  
Environment Interaction ◽  
Kernel Number ◽  
Breeding Lines ◽  
High Level ◽  
Genetic Coefficient ◽  
Triticosecale Wittmack

Assessing the existence and extent of genetic variation in kernel number per m2 (KNO) and in KNO-related traits is necessary both for overcoming sink limitations through breeding and in order to correctly model triticale grain yield. A set of 112 advanced breeding lines derived from various crosses between winter and spring hexaploid triticales was grown for 2 years in a field experiment to evaluate genetic variation and heritability for KNO, chaff weight per m2 at maturity (CHAFFW) and number of kernels per unit weight of chaff (K/CHAFF). Genetic correlations were also calculated between these traits and grain weight and yield. K/CHAFF (but not CHAFFW) exhibited a high level of genetic variation and a low contribution of the genotype by environment interaction component to the overall variance and was highly heritable. There was no detectable genetic correlation between K/CHAFF and CHAFFW; however, K/CHAFF was correlated with KNO (r = 0.66, P < 0.001). K/CHAFF fulfils the major requirements of an indirect screening trait for KNO and of a genetic coefficient in modelling.

scholarly journals Heritability, Genetic Variability and Correlation Analysis of some Important Agronomic Traits in Rapeseed Advanced Lines

2015 ◽  
Vol 48 (4) ◽  
pp. 71-80 ◽  
Author(s):  
V. Rameeh
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Yield Components ◽  
Agronomic Traits ◽  
Block Design ◽  
Main Axis ◽  
Mean Values ◽  
Plant Seeds ◽  
Genetic Coefficient Of Variation ◽  
Genetic Coefficient

Abstract The efficiency of a breeding program depends mainly on the direction of the correlation between yield and its components and the relative importance of each component involved in contributing to seed yield.Twenty one rapeseed genotypes were evaluated based on randomized complete block design with three replications. Significant genotypes effects were exhibited for phenological traits, plant height, yield components except pod length and seed yield, indicating significant genetic differences among the genotypes. High broad sense heritability were determined for phenological traits, plant height and seed yield demonstrating selection gain for improving these traits will be high. Pods on main axis and pods per plant had high value of genetic coefficient of variation and also were significant correlated with seed yield. The results of factor analysis exhibited three factors including first yield components (plant height, pods on main axis and seed yield), second yield components (pods per plant, seeds per pod and 1000-seed weight) and fixed capital factor (phenological traits). On the basis of cluster analysis, the genotypes were classified in three groups and the group with high seed yield had high mean values of plant height, days to maturity and pods per plant.

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