scholarly journals Estimates of genetic variability and association studies in quantitative plant traits of Eruca spp. landraces

Genetika ◽  
2010 ◽  
Vol 42 (3) ◽  
pp. 501-512 ◽  
Author(s):  
Kadri Bozokalfa ◽  
Eşiyokhülya İlbi ◽  
Kaygisiz Aşçioğul
Keyword(s):  
Genetic Variability ◽  
Agronomic Traits ◽  
Plant Traits ◽  
Association Studies ◽  
Broad Sense ◽  
Breeding Programme ◽  
Phenotypic Correlation ◽  
Broad Sense Heritability ◽  
Limited Information ◽  
Plant Weight

Despite the increasing of economical importance of rocket plant limited information is available on genetic variability for the agronomic traits among Eruca spp. Hence, heritability and association studies of plant properties are necessities for a successful further rocket breeding programme. The objective of this study was to examine phenotypic and genotypic variability, broad sense heritability, genetic advance, genotypic and phenotypic correlation and mean for agronomic traits of rocket plant. The magnitude of phenotypic coefficient of variation values for all the traits were higher than the corresponding values and broad sense heritability estimates exceeded 65% for all traits. Phenotypic coefficients of variability (PCV) ranged from 7.60 to 34.34% and genotypic coefficients of variability (GCV) ranged between 5.58% for petiole thickness and 34.30% for plant weight. The results stated that plant weight, siliqua width, seed per siliqua and seed weight could be useful character for improved Eruca spp. breeding programme.

scholarly journals Variability, heritability and association analysis in plant traits of swiss chard (Beta vulgaris subsp. cicla)

Genetika ◽  
2011 ◽  
Vol 43 (2) ◽  
pp. 239-252 ◽  
Author(s):  
Dursun Eşiyok ◽  
Kadri Bozokalfa ◽  
Tansel Kaygisiz-Aşçioğul
Keyword(s):  
Genetic Variability ◽  
Correlation Coefficient ◽  
Coefficient Of Variation ◽  
Agronomic Traits ◽  
Plant Traits ◽  
Total Yield ◽  
Phenotypic Correlation ◽  
Agronomic Characters ◽  
Swiss Chard ◽  
Essential Contribution

Plant breeders mainly interested in improvement agronomic properties of desirable trait accompanied with genetic architecture of major characters and their interrelationship. Genetic variability and character association are prime importance and provide essential contribution for successful breeding programme. In the present research genetic variability, heritability, phenotypic and genotypic correlations of several agronomic characters were studied in fifty-four swiss chard accessions and cultivars. Analysis of variance observed highly significant variations among accessions, and phenotypic coefficient of variation (PCV) was higher magnitude of genotypic coefficient of variation (GCV) for all agronomic characters. The lamina length, lamina width, petiole thickness, petiole width, lightness, chroma and leaf dry matter observed high magnitude broad sense heritable characters accompanied with high genetic advance. Genotypic correlation coefficient showed higher than phenotypic correlation coefficient which could be explained by low environmental effect on investigated agronomic traits. Positive correlation was revealed between petiole length, lamina length, lamina width, petiole thickness and petiole width which comprise total yield in swiss chard.

scholarly journals Genetic Variability Studies on Twelve Genotypes of Rice (Oryza sativa L.) for Growth and Yield Performance in South Eastern Nigeria

2017 ◽  
Vol 9 (1) ◽  
pp. 110-115 ◽  
Author(s):  
Vincent N. ONYIA ◽  
Emeke C. OKECHUKWU ◽  
Agatha I. ATUGWU ◽  
Ndueso M. AKPAN
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Agronomic Traits ◽  
Oryza Sativa L ◽  
Broad Sense ◽  
Growth And Yield ◽  
Rice Grain ◽  
Broad Sense Heritability ◽  
Significant Difference ◽  
Days To Maturity

Twelve genotypes of rice collected from the National Cereals Research Institute (NCRI), Badeggi, Bida, Niger State, Nigeria were evaluated to estimate the magnitude of genetic variability and relationship of some agronomic traits of rice and their contributions to yield. The results obtained showed a significant difference (p ≤ 0.05) among the genotypes in all the traits studied. Genotype ‘WAB 35-1-FX2’ produced a significantly higher grain yield of 3.40 t/ha compared with all the other genotypes in the two years combined. Genotypes ‘WAB 33-25’, ‘WAB 56-1-FX2’, ‘WAB 56-39’, ‘WAB 56-125’, ‘ITA 150’ and ‘FAROX 16 (LC)’ were the most stable grain yielding genotypes across the two years of the experiment. High broad sense heritability (h2bs) was associated with grain yield (h2bs = 98.63%), number of spikelets/panicle (98.78%), plant height (98.34%) for the first year planting, whereas in the second year planting, days to 50% flowering (96.72%), days to maturity (94.14%) and grain yield (83.33%) were among the traits that showed high broad sense heritability. The two years combined correlation analysis showed that grain yield correlated significantly and positively with number of spikelets/panicle (r = 0.2358*), number of panicles/m2 (r = 0.1895*), number of fertile spikelets/panicle (r = 0.1672*) and 1,000 grain weight (r = 0.1247*), indicating that these traits can be phenotypic basis for improving grain yield of rice. Conversely, grain yield exhibited negative correlation with days to 50% flowering (-0.3009) and days to maturity (-0.2650), though not significant. This suggests that rice grain yield can be improved by selecting early flowering and maturing genotypes especially under heat and drought prone conditions.

High Heritability of Glycyrrhizic Acid, Glabridin, Liquiritin and Liquiritigenin in Licorice (Glycyrrhiza Glabra L.) Populations of Iran

2021 ◽  
Author(s):  
Ghasem Eghlima ◽  
Mohsen Sanikhani ◽  
Azizollah Kheiry ◽  
Javad Hadian
Keyword(s):  
Coefficient Of Variation ◽  
Morphological Traits ◽  
Glycyrrhizic Acid ◽  
Correlation Coefficients ◽  
Glycyrrhiza Glabra ◽  
Broad Sense ◽  
Phenotypic Correlation ◽  
Broad Sense Heritability ◽  
Narrow Sense Heritability ◽  
Perennial Plant

Abstract Glycyrrhiza glabra L. is an herbaceous, perennial plant with high distribution in Iran. Genetic variability, heritability and correlation among characters in 22 populations of G. glabra L. were studied. The genetic parameters among the traits including phenotypic variances, genotypic variances, genotype by environment variances, broad-sense heritability and genotypic and phenotypic correlation coefficients were studied. Variance components analysis showed that the extent of phenotypic coefficient of variation (PCV) was fairly higher for all the examined traits compared with genotypic coefficient of variation (GCV). Glabridin (GLA) exhibited high GCV and PCV (156.07% and 156.68%, respectively). The broad sense heritability varied from 38.92–99.79% and narrow sense heritability ranged from 9.70 % to 24.94%. Heritability of GLA, glycyrrhizic acid (GLY), liquiritin (LI), liquiritigenin (LIQ), rutin (RU) and rosmarinic acid (RA) were very high, exhibiting more than 97% heritability. Therefore, these critical characteristics can efficiently be selected and inherited in breeding programs. In most traits, the genotypic correlations showed the same direction as the phenotypic correlations. The contents of GLA and LIQ showed a positive correlation with majority of morphological traits. Therefore, selecting individual plants having desired morphological traits can be correlated with high contents of bioactive compounds in the harvested root.

scholarly journals Estimating genetic variability, gene effect, heritability, and genetic advance of yield component agronomic traits: towards the improvement of peanut agronomic traits.

2021 ◽  
Author(s):  
Addisu Getahun
Keyword(s):  
Growth Rate ◽  
Seed Yield ◽  
Agronomic Traits ◽  
Broad Sense ◽  
Broad Sense Heritability ◽  
Genetic Advance ◽  
Seed Length ◽  
Pod Yield ◽  
Seed Width ◽  
Pod Length

Abstract Background: Peanut is an important oil and legume food crop for human and feed for livestock. Peanut yield association characters like pod and seed traits are the most widely targeted parameter. Peanut yield is a function of growth rate, duration of reproductive growth, and the fraction of crop growth rate which are partitioned toward pod yield. For effective selection, heritability along with genetic advance is more useful than the estimation of only heritability. Methods: The present study field design was laid out using single row and single plot techniques. Pod length, pod width, pod length by width, seed length, seed width, seed length by width yield contributing data were collected both from two parents and 251 RIL populations across two locations in two consecutive cropping seasons (2015/2016 & 2016/2017). Data analysis was computed through SAS ver.9.4 and PBTools ver.1.4. Results: The highest genotypic coefficient of variation was found in pod length (22.47), number of pods per plant (23.66), pod yield per plant (28.43), multiple seedpods per plant (30.44). The highest narrow sense heritability was found in seed length (66%), pod length by width (87%), and pod thickness (93%), meanwhile, the highest broad sense heritability values have been recorded in seed length (99%), seed length by width (99%), number of pods per plant (95%), shelling percentage (94%), pod thickness (93%), thickness of pod shells (92), seed yield per plant (89%), seed thickness (87%), seed width (83%), multiple seedpods per plant (79%), and pod weight per plant (75%). The highest genetic advance as percent of mean values occurred in multiple seedpods per plant (215.44), number of pods per plant (85.28), pod yield per plant (64.90), seed yield per plant (63.49), thickness of pod shells (56.87), pod length by width (36.55), seed length by width (30.98), and seed length (23.26). Conclusions: Additive gene effects were observed in the traits of seed length, seed length by width, pod length, pod width, pod length by width, pod thickness, thickness of pod shells, and multiple seedpods per plant. The highest broad sense heritability values coupled with high genetic gain were estimated in multiple seedpods per plant, number of pods per plant, pod weight plant, seed weight per plant, thickness of pod shells, pod length by width, seed length by width. Therefore, in the present study, use more pod and seed-related traits than the previous findings.

Performance, heterosis and heritability in selected tropical maize single, double and three-way cross hybrids

2002 ◽  
Vol 138 (1) ◽  
pp. 21-28 ◽  
Author(s):  
G. B. SALEH ◽  
D. ABDULLAH ◽  
A. R. ANUAR
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Block Design ◽  
Grain Weight ◽  
Broad Sense ◽  
Broad Sense Heritability ◽  
Tropical Maize ◽  
Randomized Complete Block Design ◽  
Parental Inbred ◽  
Ear Number

A series of tropical maize hybrids, involving 10 single, four double and four three-way crosses were evaluated with their parental inbred lines and three control varieties, at Universiti Putra Malaysia, Serdang, Malaysia, in a randomized complete block design, with three replications. The objectives were to identify hybrids superior for yield, yield components and other agronomic traits, to estimate heterosis revealed by the hybrids, and to estimate broad-sense heritability for important characters in the populations. The hybrids were found to vary highly for grain yield and most other traits measured. High estimates of heterosis were shown by grain yield, ear weight and grain weight per ear, moderate for plant and ear heights, shelling percentage, ear diameter, number of kernel rows per ear, number of kernels per ear row and 100-grain weight. The hybrids flowered and matured earlier than their respective inbred parents. Estimates of broad-sense heritability also varied with characters. Moderate heritability was shown for grain yield indicating a substantial amount of genetic variation in this population of hybrids. Low and negligible heritability for days to silking and 100-grain weight indicate that these traits were very much influenced by environmental factors. Based on the overall performance of the hybrids, the single cross, SC-2, the double cross, DC-11 and the three-way cross, TWC-15, were found to have high potential. No obvious differences were observed in performance among the three categories of hybrids, the single, double and three-way crosses.

Incongruent psychosis in bipolar i disorder: heritability and importance for genetic association studies

2011 ◽  
Vol 26 (S2) ◽  
pp. 213-213
Author(s):  
M. Grigoroiu-Serbanescu ◽  
R.C. Elston
Keyword(s):  
Sex Difference ◽  
Genetic Basis ◽  
Hospital Admissions ◽  
Association Studies ◽  
Genetic Association Studies ◽  
Total Sample ◽  
Broad Sense ◽  
Broad Sense Heritability ◽  
Narrow Sense ◽  
Bipolar I Disorder

IntroductionPhenotype homogeneity and heritability are important conditions for identifying the genetic basis of bipolar I disorder (BPI) in association studies. Our objective was to study the heritability of mood-incongruent psychosis (MIP) in BPI in a sample of 504 families ascertained through BPI probands (294 females; 210 males) recruited from consecutive hospital admissions.MethodThere were 402 families with a psychotic proband and 275 families with a proband with MIP. All probands were directly interviewed as well as 79.55% first-degree and 22.59% second-degree relatives. The narrow and the broad sense heritability (h2) of MIP and the effect of sex and age were estimated using S.A.G.E.v.6.01-software (2009).ResultsThere was no sex difference for the psychosis prevalence in probands but MIP was two times more frequent in females than in males. In families with MIP probands the narrow-sense h2 for MIP was 0.14 (SE = 0.02, P = 0.002) and the broad-sense h2 was 0.20 (SE = 0.014, P = 0.0000). Significant but lower heritabilities were found in families with a psychotic proband (narrow-sense h2 = 0.12; broad-sense h2 = 0.13). In the total sample the narrow-sense h2 was 0.06 (P < 0.005) and the broad-sense h2 was 0.10 (P < 0.00001). The female sex was more prone to incongruency (χ2 = 33.32, P = 0.0000).ConclusionThe heritability of MIP was significant but not high in families ascertained through BPI probands regardless of familial psychopathology. These finding is in line with GWAS-studies showing that the polygenic score fails to differentiate psychotic BPI from non-psychotic BPI. Is therefore incongruent psychosis a useful dimension for association studies?

scholarly journals ESTIMATION OF VARIANCES , GENOTYPIC AND PHENOTYPIC CORRELATIONS FOR SOME TRAITS OF MAIZE UNDER HIGHEST UNDUR NITROGEN ABUNDANCE

2016 ◽  
Vol 47 (4) ◽  
Author(s):  
S. J. Bunder
Keyword(s):  
Selection Index ◽  
Diallel Cross ◽  
Grain Weight ◽  
Broad Sense ◽  
Phenotypic Correlation ◽  
Broad Sense Heritability ◽  
Coefficients Of Variation ◽  
Significant Difference ◽  
Genotypic And Phenotypic Correlations ◽  
Nitrogen Abundance

The objective of this study was estimation of variances, broad sense heritability genotypic and phenotypic correlation for some traits of  maize  under  nitrogen abundance . the experiment was conducted at the farm of the Dept. of  Field Crop Sci., College of Agric., Univ. of  Baghdad during the Spring and fall seasons of 2012 under level 400 Kg N. ha rate-1 . Diallel cross was performed among four maize inbred lines (Zm7, Zm607, Oh40, Zr8) to produce six single crosses in spring season . The seeds of parents and crosses were sown in fall season using R.C.B.D. with three replicates. The results showed significant difference among genotypes and the values of the genotypic variance were more than environment variance in all studied characters. The values of phenotypic coefficients of variation larger than the genotypic and the higher rate of genotypic coefficient of variation for 300 grain weight 16.74, no. of grain per row 15.05 and leaves area 12.18. furthermore high estimates of broad sense heritability were observed for all characters and the highest value 81.45 for 300 weight grain and 75.31 for leaves area .The grain yield gave high significant negative genotypic and phenotypic with silking date and positive with plant height , leaves area , no. of grain per row , 300 grain weight. It was concluded that a breeder can use leaves area , no. of grain per row and grain weight as selection index  in selection program of  maize under high nitrogen

scholarly journals Karakter Agronomi Galur Padi Dihaploid Asal Kultur Antera Hasil Persilangan Three Way Cross

2018 ◽  
Vol 46 (1) ◽  
pp. 9
Author(s):  
Mohammad Syafii ◽  
Bambang Sapta Purwoko ◽  
Iswari Saraswati Dewi ◽  
Dan Willy Bayuardi Suwarno
Keyword(s):  
Genetic Variability ◽  
Anther Culture ◽  
Doubled Haploid ◽  
Block Design ◽  
Broad Sense ◽  
Yield Potential ◽  
Broad Sense Heritability ◽  
High Genetic Variability ◽  
Doubled Haploid Lines ◽  
Agronomic Character

<p><em></em><em>Anther culture is useful tool in rice breeding. The technique shortens the time to obtain full homozygous plant in just one generation. Information related to genetic variability among the regenerants is important for further analysis including selection activities. The objective of this study was to analyze agronomic character variability and yield potential among doubled-haploid lines (DH0) derived from anther culture. This study was carried out in Center for Agricultural Biotechnology and Genetic Resources Research and Development (BB Biogen) from October 2016 to February 2017. The experiment was arranged in randomized complete block design (RCBD) with three replications. Forty eight doubled haploid lines derived from anther culture and three check varieties were evaluated. The results showed high genetic variability as well as broad sense heritability (more than 90%) for all variables tested. Several lines showed superior agronomic characters compared to check (Ciherang, Inpari 18, Inpago 10). Anther culture could generate high genetic variability for further selection.<br /><br />Keywords: anther culture, broad sense heritability, haploid technology</em></p>

Estimation of genetic variability for seed yield and its components in chickpea (Cicer arientinum L.) genotypes

2017 ◽  
Author(s):  
Aybegün Ton ◽  
Adem Emin Anlarsal
Keyword(s):  
Genetic Variability ◽  
Plant Height ◽  
Seed Yield ◽  
Seed Weight ◽  
Yield Component ◽  
Broad Sense ◽  
Broad Sense Heritability ◽  
Design Data ◽  
Climate Conditions ◽  
100 Seed Weight

The present experiment was conducted to determine magnitude of genetic variability with fifteen kabuli chickpea genotypes in the 2013/2014 and 2014/2015 growing season under Mediterranean climate conditions. In this present study seed yield per plant and yield component were investigated. The experiment was orginazed with three replications in randomized complate blocks design. Data were recorded on plant height, number of branches per plant, height of first podding node, full and total pods number per plant, seeds number per plant, 100-seed weight and seed yield per plant. Analysis of variance for seed yield per plant and its component showed significant differences among all genotypes. Broad-sense heritability ranged from 12.27% (total pod number per plant) to 93.88% (100-seed weight). Moderate and high estimates of broad sense heritability were observed for branches number per plant, harvest index and 100-seed weight. It can be concluded that the seed yield of chickpea can be improved by selecting these characters in breeding chickpea materials.

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