Correlations between characters and path analysis in sweet sorghum (Sorghum bicolor (L.) Moench) genotypes for juice production

Sweet sorghum presents stems with juice similar to that of sugar cane, rich in fermentable sugars, that may be used in off-season for sugar and ethanol production optimizing the sugar-ethanol sector. The objective of this work was to determine genetic correlations between characters and perform path analysis between juice volume and its components. Twenty-five sweet sorghum genotypes were evaluated in randomized blocks design with three repetitions and studied variables were: number of days to flowering; plant height; number of stems; weight of green mass; weight of dry mass; number of leaves; diameter of stems; volume of extracted juice and percentage of total soluble solids. In order to verify the existence of variability among the genotypes, data were subjected to variance analysis by F-test. Subsequently, genetic parameters were determined, as soon as genetic correlation estimator’s method, performed by t-test, to determine phenotypic correlation and bootstrap method for determining environmental and genetics correlation coefficient. Before performing path analysis a multicollinearity diagnosis was also conducted. The results of genetic correlation and path analysis point weight of green mass as the main variable influencing the juice volume, allowing these characters in indirect selection for increasing juice volume

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Realized Sampling Variances of Estimates of Genetic Parameters and the Difference Between Genetic and Phenotypic Correlations

Genetics ◽

10.1093/genetics/143.3.1409 ◽

1996 ◽

Vol 143 (3) ◽

pp. 1409-1416 ◽

Cited By ~ 1

Author(s):

Kenneth R Koots ◽

John P Gibson

Keyword(s):

Genetic Correlation ◽

Genetic Parameters ◽

Genetic Parameter ◽

Genetic Correlations ◽

Phenotypic Correlation ◽

Parameter Estimates ◽

Sampling Variance ◽

Phenotypic Correlations ◽

Genetic And Phenotypic Correlations ◽

Heritability Estimates

Abstract A data set of 1572 heritability estimates and 1015 pairs of genetic and phenotypic correlation estimates, constructed from a survey of published beef cattle genetic parameter estimates, provided a rare opportunity to study realized sampling variances of genetic parameter estimates. The distribution of both heritability estimates and genetic correlation estimates, when plotted against estimated accuracy, was consistent with random error variance being some three times the sampling variance predicted from standard formulae. This result was consistent with the observation that the variance of estimates of heritabilities and genetic correlations between populations were about four times the predicted sampling variance, suggesting few real differences in genetic parameters between populations. Except where there was a strong biological or statistical expectation of a difference, there was little evidence for differences between genetic and phenotypic correlations for most trait combinations or for differences in genetic correlations between populations. These results suggest that, even for controlled populations, estimating genetic parameters specific to a given population is less useful than commonly believed. A serendipitous discovery was that, in the standard formula for theoretical standard error of a genetic correlation estimate, the heritabilities refer to the estimated values and not, as seems generally assumed, the true population values.

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HERITABILITIES AND GENETIC CORRELATIONS FOR ULTRASONIC BACKFAT MEASUREMENTS, GROWTH AND CARCASS TRAITS IN SWINE

Canadian Journal of Animal Science ◽

10.4141/cjas82-081 ◽

1982 ◽

Vol 62 (3) ◽

pp. 665-670 ◽

Cited By ~ 3

Author(s):

D. C. JEFFRIES ◽

R. G. PETERSON

Keyword(s):

Key Words ◽

Genetic Correlation ◽

Genetic Parameters ◽

Average Daily Gain ◽

Genetic Correlations ◽

Phenotypic Correlation ◽

Ultrasonic Measurements ◽

Yorkshire Pigs ◽

Daily Gain ◽

Season Interaction

Genetic parameters were estimated for 2403 purebred Yorkshire pigs over a 2-yr period, representing 21 sires. The traits studied included average daily gain, age adjusted to 90 kg, ultrasonic measurements of backfat at the mid-back and loin positions, total and adjusted total ultrasonic backfat and corresponding carcass backfat measurements. Least squares analyses were used to estimate and adjust for the effects of sex, year-season and sex by year-season interaction. Heritabilities and genetic correlations were calculated for all traits using both half- and full-sib estimates. Adjusted age and adjusted total ultrasonic backfat measurements were found to have the highest heritabilities of the live traits in this study. Estimates of heritability for adjusted age and adjusted total ultrasonic backfat were 0.24 ± 0.10 and 0.26 ± 0.10 based on half-sib and 0.56 ± 0.07 and 0.41 ± 0.06 from full-sib analyses. The genetic correlation between these two traits was −0.07 ± 0.28 based on the half-sib method. The total phenotypic correlation was −0.01 ± 0.02. Key words: Swine, ultrasonic backfat, heritabilities, genetic correlations

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Genetic correlations and path-coefficient analysis of yield and quality components in wheat, Triticum aestivum L.

Genetika ◽

10.2298/gensr0401013z ◽

2004 ◽

Vol 36 (1) ◽

pp. 13-21 ◽

Cited By ~ 2

Author(s):

Veselinka Zecevic ◽

Desimir Knezevic ◽

Danica Micanovic

Keyword(s):

Genetic Correlation ◽

Harvest Index ◽

Genetic Correlations ◽

Grain Weight ◽

Spike Length ◽

Phenotypic Correlation ◽

Path Coefficient ◽

Thousand Grain Weight ◽

Path Coefficient Analysis ◽

Bread Making

The genetic and phenotypic correlations between yield components (productive tillering, plant height, spike length, number of spikelets per spike, number of grains per spike, grain weight per spike, grain weight per plant, harvest index, thousand grain weight) and quality components (grain protein content and sedimentation value) were investigated. The plant material was comprised of 50 genotypes of winter wheat grown during two years. Path- coefficient analysis of genetic correlation coefficients for grain mass/plant and other traits determined interrelationships among grain mass per plant and other yield and bread making quality components. The strongest positive genetic correlation was found between grain weight per spike and thousand grain weight and between spike length and number of spikelets per spike. Phenotypic correlation analysis indicated that grain weight per spike correlated positively and significantly with harvest index and thousand kernel weight. The strongest direct effect on grain weight per plant had harvest index and number of spikelets per spike. The spike length through number of spikelets per spike had the strongest indirect effect on grain weight per plant.

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PRODUTIVIDADE DO MELÃO RENDILHADO FERTIRRIGADO COM SILÍCIO

Irriga ◽

10.15809/irriga.2021v1n2p321-334 ◽

2021 ◽

Vol 1 (2) ◽

pp. 321-334

Author(s):

Fernando André Silva Santos ◽

Roberto Rezende ◽

Gustavo Soares Wenneck ◽

Danilo Cesar Santi ◽

Reni Saath ◽

...

Keyword(s):

Path Analysis ◽

Cucumis Melo ◽

Aerial Part ◽

Dry Mass ◽

Soluble Solids ◽

Quadratic Model ◽

Mato Grosso ◽

Production Ratio ◽

Solids Content ◽

E Mail

PRODUTIVIDADE DO MELÃO RENDILHADO FERTIRRIGADO COM SILÍCIO FERNANDO ANDRÉ SILVA SANTOS1; ROBERTO REZENDE2; GUSTAVO SOARES WENNECK3; DANILO CÉSAR SANTI3; RENI SAATH2 E DANIELE DE SOUZA TERASSI3 1Professor do departamento de Agronomia, Universidade do Estado de Mato Grosso (UNEMAT), Av. Santos Dumont, s/n, Cidade Universitária, CEP: 78.200-000, Cáceres, Mato Grosso, Brasil. E-mail: [email protected] 2Professor do Departamento de Agronomia, Universidade Estadual de Maringá (UEM), Av. Colombo, 5790, Zona 7, CEP:87020-900, Maringá, Paraná, Brasil. E-mail: [email protected]; [email protected] 3Discente do Programa de Pós-graduação em Agronomia, Universidade Estadual de Maringá (UEM), Av. Colombo, 5790, Zona 7, CEP:87020-900, Maringá, Paraná, Brasil. E-mail:[email protected]; [email protected]; [email protected] 1 RESUMO O objetivo do trabalho foi avaliar a produtividade e acúmulo de biomassa na cultura do melão rendilhado, cultivado em ambiente protegido sob diferentes condições hídricas e doses de silício (Si). O experimento foi conduzido em blocos casualizados, esquema fatorial 5x2, sendo cinco doses de Si (0, 50, 100, 150 e 200 kg ha-1) e duas condições de reposição hídrica (40 e 100% da evapotranspiração da cultura (ETc)), com quatro repetições. A fertilização com Si foi realizada após início da formação dos frutos. Foram avaliados a produção por planta, teor de sólidos solúveis totais dos frutos, massa seca foliar, caulinar e radicular, e determinado a razão de produção em função da massa seca da parte aérea. Adotou-se análise estatística de trilha para indicar o efeito de cada variável sobre a produção. A aplicação de Si reduziu linearmente a produção por planta na condição de 100% da ETc. Na irrigação deficitária a produção foi descrita em modelo quadrático. As doses de Si afetaram significativamente a partição de assimilados entre frutos. Na parte aérea, ocorreu influência das doses do elemento sob irrigação deficitária. Com base na análise de trilha, a massa seca foliar e caulinar são diretamente relacionadas à produção, independentemente da disponibilidade hídrica. Palavras-chave: ambiente protegido, Cucumis melo, elemento benéfico, microirrigação. SANTOS, F. A. S.; REZENDE, R.; WENNECK, G. S.; SANTI, D. C.; SAATH, R.; TERASSI, D. S. PRODUCTIVITY OF MUSKMELON FERTIRRIGATED WITH SILICON 2 ABSTRACT This work aimed to evaluate the productivity and accumulation of biomass in the culture of muskmelon grown in a greenhouse under different water conditions and doses of silicon (Si). The experiment was conducted in a randomized block, a 5x2 factorial scheme, with five doses of Si (0, 50, 100, 150 and 200 kg ha-1) and two water replacement conditions (40 and 100% of the crop evapotranspiration (ETc)), with four replications. Fertilization with Si was performed after the begriming of fruit formation. The production per plant, total soluble solids content of the fruits, dry leaf, stem and root mass was evaluated, and the production ratio as a function of the dry mass of the aerial part was determined. Path analysis statistics were adopted to indicate the effect of each variable regarding growth on production. The application of Si linearly reduced production per plant in the condition of 100% of ETc, while in deficient irrigation the production described in a quadratic model. The doses of Si significantly affected the partition of assimilates between fruits. Regarding the aerial part, there was an influence of the doses of the element under deficient irrigation. Based on the path analysis, the dry leaf and stem mass are directly related to production, regardless of water availability. Keywords: greenhouse, Cucumis melo, benefic element, micro-irrigation.

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HERITABILITY OF TEAT NUMBER IN SWINE

Canadian Journal of Animal Science ◽

10.4141/cjas90-054 ◽

1990 ◽

Vol 70 (2) ◽

pp. 425-430 ◽

Cited By ~ 9

Author(s):

R. M. McKAY ◽

G. W. RAHNEFELD

Keyword(s):

Key Words ◽

Genetic Correlation ◽

Genetic Correlations ◽

Phenotypic Correlation ◽

Data Set ◽

Phenotypic Correlations ◽

Teat Number ◽

Genetic And Phenotypic Correlations ◽

Time Periods ◽

Selection For

Heritabilities were estimated for teat number in nine populations of swine over two time periods. From 1962 to 1974 the populations included Lacombe, Yorkshire, and Lacombe × Yorkshire. In this data set, only total teat number was recorded. From 1982 to 1988 three purebred populations (Landrace, Yorkshire, and Hampshire) and three crossbred populations (Landrace-Yorkshire rotation, Landrace × Yorkshire, and Landrace × Hampshire) were represented and total teat number and the number of teats anterior and posterior to the navel were recorded. Heritabilities for total teat number were greater in the 1982–1988 data (ranging from 0.27 to 0.47) than in the 1962–1974 data (ranging from 0.20 to 0.32). The heritability of posterior teat numbers (ranging from 0.08 to 0.39) was generally larger than the heritability of anterior teat numbers (ranging from 0.03 to 0.21) and both were considerably less than the heritability of total teat number. Genetic and phenotypic correlations were calculated for the relationships between anterior and posterior teat numbers (AP), anterior and total teat numbers (AT), and posterior and total teat numbers (PT). The relative magnitudes of the genetic and phenotypic correlations with respect to AP, AT, and PT revealed that selection for increased total teat number would increase the number of anterior and posterior teats. However, the larger genetic correlations for PT relative to AT would lead to a greater increase in posterior teat number than anterior teat number. Key words: Pigs, teat number, heritability, genetic correlation, phenotypic correlation

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A preliminary genetic analysis of breech and tail traits with the aim of improving the welfare of sheep

Australian Journal of Agricultural Research ◽

10.1071/ar05444 ◽

2007 ◽

Vol 58 (2) ◽

pp. 161 ◽

Cited By ~ 15

Author(s):

D. R. Scobie ◽

D. O'Connell ◽

C. A. Morris ◽

S. M. Hickey

Keyword(s):

New Zealand ◽

Genetic Analysis ◽

Genetic Correlation ◽

Genetic Correlations ◽

Phenotypic Correlation ◽

Linear Scale ◽

Bare Area ◽

Phenotypic Correlations ◽

Tail Docking

The area of naturally bare skin around the perineum was scored at weaning in lambs (n = 2152) from a composite flock of New Zealand crossbred sheep. Breech bareness was scored on a range from 1, where wool was growing right to the edges of the anus, to 5, where a large bare area surrounded the perineum. Bareness on the under surface of the tail was measured on a linear scale at tail docking. Dag score (degree of breech soiling) was recorded at weaning, on a scale of 0–5, where an increasing score indicated more dags. Dag score was taken as a measure of the risk of flystrike in the breech. Female lambs tended to have slightly greater (P < 0.001) breech bareness score (mean score 2.7) than males (mean score 2.6), whereas mean dag score of females was lower than that of males (0.45 v. 0.53; P < 0.05). Breech bareness score had a heritability of 0.33 ± 0.06, and the length of bare skin under the tail had a heritability of 0.59 ± 0.06. The genetic correlation between breech bareness score at weaning and length of bare skin under the tail at docking was positive (0.35 ± 0.10). These 2 traits had phenotypic correlations with dag score of –0.17 ± 0.02 and –0.03 ± 0.03, respectively, and genetic correlations with dag score of –0.30 ± 0.13 and 0.03 ± 0.12, respectively; negative values indicated a favourable relationship. Tails were removed at docking, so the phenotypic correlation of about zero between tail data and dag score at weaning was of little utility. Our results suggest that selecting for these 2 bareness traits could reduce dag formation and the associated risk of breech strike.

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Heritability of chemical fat content in the loin muscle of baconers

Animal Science ◽

10.1017/s000335610003395x ◽

1961 ◽

Vol 3 (2) ◽

pp. 195-198 ◽

Cited By ~ 19

Author(s):

H. Duniec ◽

J. Kielanowski ◽

Zofia Osińska

Keyword(s):

Genetic Correlation ◽

Genetic Correlations ◽

Fat Content ◽

Phenotypic Correlation ◽

Progeny Testing ◽

Fatty Tissue ◽

Large White ◽

Tissue Content

Data on carcasses of 352 Large White baconers by 44 boars were taken from reports of Progeny Testing Stations to estimate the heritability of chemical fat in the loin muscle and of fatty tissue content in the carcass, and their phenotypic and genetic correlations.The heritability of the chemical fat content in the loin muscle was found to be 0·50, that of the fatty tissue content in the carcass 0·69. The genetic correlation between the characteristics under study seems to be very low (rA = 0·11), and their phenotypic correlation, though significant statistically, was also found to be low (about 0·2).

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Genetic parameters for Australian maternal and dual-purpose meatsheep breeds. I. Liveweight, wool production and reproduction in Border Leicester and related types

Australian Journal of Agricultural Research ◽

10.1071/ar9940459 ◽

1994 ◽

Vol 45 (2) ◽

pp. 459 ◽

Cited By ~ 14

Author(s):

LD Brash ◽

NM Fogarty ◽

SA Barwick ◽

AR Gilmour

Keyword(s):

Genetic Correlation ◽

Litter Size ◽

Genetic Parameters ◽

Genetic Correlations ◽

Heritability Estimate ◽

Reproductive Traits ◽

Phenotypic Correlation ◽

Data Set ◽

Reproduction Traits ◽

Fleece Weight

Analyses of two separate Border Leicester data sets are reported. In the first set, genetic parameters were estimated for 14 month liveweight and greasy fleece weight from 1312 ewe and ram records representing 75 sires of the Border Leicester and Glen Vale breeds (a related genotype) using derivative-free REML procedures. The heritability estimate for liveweight was 0.24 � 0.07 and greasy fleece weight was 0.17 � 0-05, with the genetic correlation being -0 21 � 0 -30 and phenotypic correlation 0.54 � 0.02. In the second data set, reproductive performance was analysed and genetic parameters were estimated from 7395 joining records for 1604 ewes, representing 165 sires, from two Border Leicester stud flocks. Reproduction traits analysed were fertility (ewes lambing of ewes joined), litter size (lambs born per ewe lambing) and lambs born (per ewe joined). The studs differed in performance for all reproductive traits; fertility (67 v. 82%), litter size (1-27 v. 1-43) and lambs born (85 v. 117%). The estimates of heritability and repeatability respectively for ewe performance were: fertility 0.01 � 0.01 and 0.05 � 0 01, litter size 0.01 � 0.02 and 0.05 � 0.01, lambs born 0.00 � 0.01 and 0.06 � 0.01. Estimates of heritability for average ewe lifetime performance were 0.04% 0.05 for fertility, 0-02 �0.05 for litter size and 0.03 � 0.05 for lambs born, based on averages of 4.6 joining and 3.5 litter size records for ewes. The genetic correlations between lambs born and its components fertility (0.96 � 0.18) and litter size (0.83 � 0.44) were high, with the genetic correlation between fertility and litter size being 0.65 � 0.52. Implications for breeding programs for Border Leicester flocks within LAMBPLAN are discussed.

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Productivity and feed quality of Sudan grass (Sorghum sudanense (Piper) Stapf.) and sweet sorghum forms

Agricultural Science and Technology ◽

10.15547/ast.2021.01.011 ◽

2021 ◽

pp. 57-62

Author(s):

S. Enchev

Keyword(s):

Sweet Sorghum ◽

Crude Protein ◽

Nutritional Value ◽

Phosphorus Content ◽

Dry Mass ◽

Feed Quality ◽

Sudan Grass ◽

Green Mass ◽

Nutritional Characteristics

Abstract. During the period 2017-2018, the feed quality and productivity of three Sudan grass varieties – Endje 1, Vercors and Super Sweet, one stabilized Sudan grass population – SWT, local sweet sorghum – „Zaharna metla“ population and the sweet sorghum cultivar “Shumensko sladko” were researched in Agricultural Institute – Shumen. Green mass (t/ha), dry matter (%) and dry mass production (%) as well as basic nutritional characteristics by the two swaths of the tested cultivars in brooming phase were controlled. It was found that the sweet sorghum cultivar “Shumensko sladko” gave the highest amount of green mass – 59.5 t/ha by two swaths, and the dry mass yield was the highest from the cultivar Endje 1 – 20.8 t/ha. In terms of chemical composition, the greatest variation was demonstrated in phosphorus content (0.369-0.696%, CV=27.3%), followed by crude fat (1.28-2.39%, CV=26.8%), Ca (0.889-1.572%, CV=21.8%), crude protein (6.05-9.00%, CV=14.6%), nitrogen free extracts (42.05-51.20%, CV=7.6%), crude fiber (32.64-39.26%, CV=6.1%) and mineral substances (8.17-9.61%, CV=5.9%). It can be summarized that all hybrids provide quality hay, however the Bulgarian cultivars Endje 1 and “Shumensko sladko” showed the best nutritional value – compared to Super Sweet, Vercors, SWT and “Zaharna metla”.

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Repeatability, correlation and path analysis of physical and chemical characteristics of peach fruits

Revista Brasileira de Fruticultura ◽

10.1590/0100-2945-272/13 ◽

2014 ◽

Vol 36 (4) ◽

pp. 971-979

Author(s):

Rosana Gonçalves Pires Matias ◽

Claudio Horst Bruckner ◽

Pedro Crescêncio Souza Carneiro ◽

Danielle Fabíola Pereira Silva ◽

José Osmar da Costa e Silva

Keyword(s):

Ascorbic Acid ◽

Path Analysis ◽

Indirect Effects ◽

Soluble Solids ◽

Phenotypic Correlation ◽

Chemical Characteristics ◽

Direct And Indirect Effects ◽

Total Carotenoids ◽

Physical And Chemical Characteristics ◽

Physical And Chemical

This study aimed to determine the number of measurements necessary to evaluate physical and chemical characteristics of peach fruits, study the relationships between them and their direct and indirect effects on the content of ascorbic acid and total carotenoids. The characteristics skin and pulp color, fruit weight, suture, equatorial and polar diameters, firmness, soluble solids (SS), titratable acidity (TA), SS/TA ratio, ascorbic acid and total carotenoids were evaluated in 39 cultivars of peach and 3 cultivars of nectarine from the orchard of the Universidade Federal de Viçosa. The repeatability coefficient was estimated by ANOVA and CPCOR. Phenotypic correlation coefficients (rf) were estimated and, after the multicollinearity diagnostics, they were unfolded to direct and indirect effects of the explanatory variables on the response variable using path analysis. There was agreement on the magnitude of repeatability coefficients obtained by the two methods; however, they varied among the 14 characteristics. The highest correlations were found between FW, SD, ED and PD. Seven fruits are sufficient to evaluate the physical and chemical characteristics of peach with a correlation coefficient of 90%. The characteristics considered in the path diagrams (b* skin, hº skin, b* pulp, hº pulp, ED, PD, FIR, SS, SS/AT and TC) are not the main determinants of the ascorbic acid. The yellow hue of the pulp (hº pulp) has the potential to be used in indirect selection for total carotenoids.

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