scholarly journals Genetic analysis for panicle characters in diallel cross of rice

1970 ◽  
Vol 33 (4) ◽  
pp. 631-638
Author(s):  
KM Iftekharuddaula ◽  
MA Newaz ◽  
MA Salam ◽  
Khaleda Akter
Keyword(s):  
Genetic Analysis ◽  
Genetic Model ◽  
Branch Length ◽  
Diallel Cross ◽  
Primary Branch ◽  
Secondary Branch ◽  
Components Of Variance ◽  
Genetic Components ◽  
Recessive Genes ◽  
Dominant Genes

An experiment was carried out to study the genetic components for eight panicle characters in rice using an 8-parent half diallel cross excluding reciprocals during Transplant Aman season, 2003. The parental genotypes used in the study were BRRI dhan29, BR4828-54-4-l-4-9, BRR1 dhan28, 1R8, Amol3, 1R65610-38-2-4-2-6-3, Minikit and ZhongYu7, which were chosen for their diversity in panicle characters. Hayman's analysis of variance (ANOVA) indicated importance of both additive and non-additive genetic components for all the panicle characters except dominance component for filled grains/secondary branches. The ANOVA showed unidirectional dominance for the characters viz, primary branch length, secondary branch length, primary branches/panicle, secondary branches/panicle and filled grains/primary branch, asymmetrical gene distribution for all the panicle traits except filled grains/secondary branch and residual dominance effects for all the panicle characters studied. Two out of eight panicle characters viz., primary branches/panicle and unfilled grains/ secondary branch followed the simple additive-dominance genetic model. The rest of the panicle characters showed nonallelic gene interaction or epistasis. According to Vr-Wr graph, partial dominance was involved in the action of genes governing the inheritance of primary branches/panicle, while complete dominance was involved in the inheritance of unfilled grains/secondary branch. Most of the dominant genes for primary branches/panicle belonged to other hand, 1R8 possessed most of the dominant genes, while 1R65610-38-2-4-2-6-3 possessed most of the recessive genes for unfilled grains/secondary branch. The estimates of components of variance demonstrated involvement of both additive and dominant components in the inheritance of primary branches/panicle and unfilled grains/secondary branch. The distribution of dominant and recessive genes was unequal in the parents for these two characters also. There was drastic influence of environment on these two panicle characters following simple additive-dominance genetic model. Heritability in narrow sense (h2 ns) was very high for primary branches/panicle and unfilled grains/secondary branch. Key Words: Genetic analysis, diallel cross, panicle characters, rice. doi: 10.3329/bjar.v33i4.2307 Bangladesh J. Agril. Res. 33(4) : 631-638, December 2008

scholarly journals Inheritance mechanism of yield and yield components in tomato

2016 ◽  
Vol 41 (2) ◽  
pp. 335-344
Author(s):  
MA Goffar ◽  
A Ahmed ◽  
GMA Halim
Keyword(s):  
Yield Components ◽  
Genetic Model ◽  
Diallel Cross ◽  
Gene Interaction ◽  
Fruit Weight ◽  
Components Of Variance ◽  
Genetic Components ◽  
Recessive Genes ◽  
Dominant Genes ◽  
Number Of Seeds

A set of 9x9 half diallel cross comprising of promising genotypes was studied to analyze the inheritance pattern of yield components in tomato. Hayman’s analysis of variance (ANOVA) indicated importance of both additive and nonadditive genetic components for all the thirteen yield contributing characters. The ANOVA showed unidirectional dominance, asymmetrical gene distribution and residual dominance effects for all the characters studied. Five out of the thirteen characters viz., number of flowers/cluster, individual fruit weight, fruit breadth, number of locules and number of seeds/fruit followed the simple additive-dominance genetic model. The rest of the characters showed non-allelic gene interaction or epistasis. P6 had most of the dominant genes for both number of flowers/cluster and number of locules, while P3 contained most dominant genes for individual fruit weight and P5 possessed that for both fruit breadth and number of seeds/fruit. The estimates of components of variance demonstrated involvement of both additive and dominant components in the inheritance of all those five characters. The distribution of dominant and recessive genes was equal in the parents for only fruit breadth. There was drastic influence of environment on these characters following simple additive-dominance genetic model except fruit breadth.Bangladesh J. Agril. Res. 41(2): 335-344, June 2016

scholarly journals GENETIC COMPONENTS OF GRAIN CHARACTERS IN RICE (Oryza sativa L.)

2008 ◽  
Vol 21 (1) ◽  
pp. 36-41
Author(s):  
K. M. Iftekharuddaula ◽  
M. A. Newaz ◽  
P. S. Biswas ◽  
M. K. Bashar
Keyword(s):  
Genetic Model ◽  
Oryza Sativa L ◽  
Gene Interaction ◽  
Components Of Variance ◽  
Partial Dominance ◽  
Complete Dominance ◽  
Genetic Components ◽  
Kernel Length ◽  
Glume Length ◽  
Recessive Genes

Hayman’s analysis of variance (ANOVA) indicated importance of both additive and non-additive genetic components for all the grain characters. The ANOVA showed unidirectional dominance for the characters viz. kernel breadth, upper empty glume length and endosperm-embryo ratio, asymmetrical gene distribution for the characters viz. grain length, grain breadth, kernel length, kernel breadth and kernel thickness and residual dominance effects for all the grain characters studied. Five out of nine grain characters viz. grain breadth, grain thickness, kernel breadth, kernel thickness and upper empty glume length followed the simple additive-dominance genetic model. The rest of the grain characters showed nonallelic gene interaction or epistasis. According to Vr-Wr graph, partial dominance was involved in the action of genes governing the inheritance of grain breadth, grain thickness, kernel breadth and kernel thickness while complete dominance was involved in the inheritance of upper empty glume length. BR4828-54-4-1-4-9 contained the most of the recessive genes for four characters except upper empty glume length while Amol3 appeared to possess most of the recessive genes. On the other hand, Minikit for grain breadth, Amol3 for grain thickness and BRRI dhan29 for kernel breadth, kernel thickness and upper empty glume length possessed most of the dominant genes for the respective characters. The components of variance demonstrated involvement of both additive and dominant components in the inheritance of grain breadth, grain thickness, kernel breadth, kernel thickness and endosperm-embryo ratio. The distribution of dominant and recessive genes was unequal in the parents for grain breadth, kernel breadth, grain thickness, kernel thickness and upper empty glume length. Again, net dominance effects were in the negative direction for all the grain characters. There was drastic influence of environment on all the five grain characters following simple additive-dominance genetic model. Heritability in narrow sense (h2 n) was very high for grain breadth, grain thickness, kernel breadth and kernel thickness. However, h2 n for upper empty glume length was moderate. DOI: http://dx.doi.org/10.3329/bjpbg.v21i1.17047

scholarly journals Inheritance of length and weight of mature larvae in six-parent diallel crosses of Mulberry Silkworm, Bombyx mori L.

2015 ◽  
Vol 21 ◽  
pp. 77-87
Author(s):  
HA Rashid ◽  
MK Ahsan ◽  
MA Hasan ◽  
I Mahfus
Keyword(s):  
Gene Action ◽  
Recessive Gene ◽  
Diallel Cross ◽  
Narrow Sense Heritability ◽  
Gene Effects ◽  
Positive Effects ◽  
Recessive Genes ◽  
Negative Effect ◽  
Mulberry Silkworm ◽  
Dominant Genes

Context: To gain a better understanding of the nature of gene action involved in the inheritance of quantitative characters can be obtained through the use of diallel cross analytical approach for the choice of desirable parents and the formulation of an effective breeding programme. Objectives: The aim was to study the nature and magnitude of gene action of inheritance for quantitative traits, length and weight of mature larvae in B. mori through six-parent diallel cross analysis in four rearing seasons Materials and Methods: Six inbred varieties of B. mori were used as parents for a diallel cross. The experiment was conducted in four rearing seasons. Mature larval length (cm) and weight (gm) were collected for statistical analysis. The data were analyzed following the biometrical techniques proposed by Jinks and Hayman (1953), Hayman (1954), Dickinson and Jinks (1956) and Jhonson and Aksel (1964). Results: In the Hayman’s analysis of variance for length and weight of mature larvae the items ‘a’ and ‘b’ were found to be significant against all the three tests of significance. The item ‘b2’ was significant for the seasons S-2 and S-3 and the ‘b3’ item was significant for all the seasons. The Items ‘c’ and ‘d’ were insignificant in all the seasons. The regressions of Wr on Vr for majority of the seasons were significant but did not deviate significantly from unit slope. The varieties Nistari, Nistari oval (G) and NanNung7B of S-1, S-2 and S-4, and Nistari of S-3 for length of larvae and Nistari and Nistari oval (G) of S-1, S-2 and S-3 and Nistari, Nistari oval (G) and Nan Nung 7B of S-4 for larval weight possessed an excess of recessive genes of negative effect. But Nistari oval (G) in S-3 for LL possessed excess of recessive genes with positive effects. On the other hand BSRI-95, BSRI-98 and BV (high) in S-1, S-2 and S-4, and Nan Nung 7B, BSRI-98 and BV(high) in S-3 for LL and BSRI-95, BSRI-98 and BV(high) in S-1, S-2 and S-3, and BSRI-95 and BV(high) in S-4 for LW possessed an excess of dominant genes, which was positive in nature. In S-3 only BSRI-95 for LL and NanNung7B in S-1, S-2 and S-3 and BSRI-98 in S-4 for LW possessed an excess of dominant genes of negative nature. At least one group of dominant genes was involved in controlling these characters. The broad sense heritability was high in all seasons for both the characters whereas the narrow sense heritability was moderate for majority of the seasons except S-3 and S-4 for LW. Conclusion: High heritability, dominant and recessive gene effects suggest that these parents could be used to develop better lines in respect of larval characters investigated in this study and selection programmes will be effective in early generations. DOI: http://dx.doi.org/10.3329/jbs.v21i0.22522 J. bio-sci. 21: 77-87, 2013

scholarly journals Theory and analysis of partial diallel crosses

1999 ◽  
Vol 22 (4) ◽  
pp. 591-599 ◽  
Author(s):  
José Marcelo Soriano Viana ◽  
Cosme Damião Cruz ◽  
Antonio Américo Cardoso
Keyword(s):  
Relative Number ◽  
Diallel Analysis ◽  
F1 Hybrids ◽  
Genotypic Differences ◽  
Diallel Crosses ◽  
Genetic Components ◽  
Recessive Genes ◽  
Using Data ◽  
Dominant Genes ◽  
Partial Diallel

This study presents theory and analysis of partial diallel crosses based on Hayman's methods. This genetic design consists of crosses among two parental groups. It should be used when there are two groups of parents, for example, dent and flint maize inbred lines, and the breeder is not interested in the assessment of crosses between parents of the same group. Analyses are carried out using data from the parents and their F1 hybrids allowing a detailed characterization of the polygenic systems under study and the choice of parents for hybridization. Diallel analysis allows the estimation of genetic and non-genetic components of variation and genetic parameters and to assess the following: genetic variability in each group; genotypic differences between parents of distinct groups; if a parent has a common or a rare genotype in the group to which it does not belong; if there is dominance; if dominant genes increase or decrease trait expression (direction of dominance); average degree of dominance in each group; the relative importance of mean effects of genes and dominance in determining a trait; if, in each group, the allelic genes have the same frequency; if genes are equally frequent in the two groups; the group with the greatest frequency of favorable genes; the group in which dominant genes are most frequent; the relative number of dominant and recessive genes in each parent; if a parent has a common or a rare genotype in the group to which it belongs, and the genotypic differences between parents of the same group. An example with common bean varieties is considered.

INHERITANCE OF EARLINESS AND PLANT HEIGHT IN A SIX-PARENT DIALLEL CROSS OF CORCHORUS OLITORIUS

1969 ◽  
Vol 11 (1) ◽  
pp. 184-191
Author(s):  
O. I. Joarder ◽  
A. M. Eunus ◽  
M. A. Rahman
Keyword(s):  
Plant Height ◽  
Diallel Cross ◽  
Transgressive Segregation ◽  
The Other ◽  
Dominant Factor ◽  
Corchorus Olitorius ◽  
Other Hand ◽  
Recessive Genes ◽  
Small Excess ◽  
Dominant Genes

Inheritance of earliness and plant height was studied in a six-parent diallel cross of jute, Corchorus olitorius L. The variety O-6E exhibited an excess of dominant genes, whereas the varieties R-26 and Chinese olitorius showed an excess of recessive genes for the character of earliness. On the other hand the variety Desimasua exhibited an excess of recessive genes and the varieties wild jute and O-5 showed a small excess of dominant genes for the character of plant height. On an overall basis, earliness and plant height were found to be controlled by both dominant and recessive genes, the contribution of the former being greater in earliness, and that of the latter being greater in plant height. Eleven dominant factors were detected to condition plant height, whereas only one dominant factor was involved in controlling earliness. Transgressive segregation for earliness was indicated in arrays with R-26 and Chinese olitorius as recurrent parents. Heritability was calculated to be 61% and 29% respectively for earliness and plant height.

Establishment and genetic analysis of complete diallel cross families of pearl oyster (Pinctada fucata)

2010 ◽  
Vol 34 (1) ◽  
pp. 26-31
Author(s):  
Long-chun GU ◽  
Jin-bi LI ◽  
Da-hui YU ◽  
Gui-ju HUANG ◽  
Jian-ye LIU
Keyword(s):  
Genetic Analysis ◽  
Diallel Cross ◽  
Pearl Oyster ◽  
Pinctada Fucata ◽  
Complete Diallel Cross

INHERITANCE OF FLOWERING TIME AND ITS APPLICATION FOR INDIRECT SELECTION IN THE DAVIS POPULATION OF GERBERA

HortScience ◽  
1990 ◽  
Vol 25 (11) ◽  
pp. 1357F-1358
Author(s):  
Yiran Yu ◽  
James Harding ◽  
Thomas Byrne
Keyword(s):  
Flowering Time ◽  
Genetic Correlations ◽  
Indirect Selection ◽  
Cut Flower ◽  
Narrow Sense ◽  
Narrow Sense Heritability ◽  
Components Of Variance ◽  
Genetic Components ◽  
Flower Yield ◽  
Cut Flower Yield

Genetic components of variance and heritability of flowering time were estimated for five generations of the Davis Populationof Gerbera hybrids, Composite, Estimates of narrow-sense heritability averaged 0.50 and broad-sense heritability averaged 0.77 using the NCII design. Narrow-sense heritability was also estimated with two models of parent-offspring regression, resulting in average heritability of 0.49 and 0.51. Estimates of components of variance indicated that the major genetic effect controlling flowering time is additive. However, the dominance component accounted for 28% of the total variance; the environmental component was only 23%. Flowering time is negatively correlated with cut-flower yield. The phenotypic coefficient was –0.34; genetic correlations were –0.47 when estimated from the NCII design, and –0.72 when estimated from the parent-off-spring method. A practical model was constructed to assess the efficiency of indirect selection for cut-flower yield using flowering time as a marker trait. The advantages of indirect selection accruing from increased population size and reduced generation time are discussed.

GENETIC ANALYSIS OF PLASMA CORTICOSTERONE LEVELS IN TWO INBRED STRAINS OF MICE

1972 ◽  
Vol 55 (2) ◽  
pp. 415-420 ◽  
Author(s):  
B. E. ELEFTHERIOU ◽  
D. W. BAILEY
Keyword(s):  
Genetic Analysis ◽  
Recombinant Inbred ◽  
Epistatic Interaction ◽  
Genetic Model ◽  
Inbred Strains ◽  
Plasma Corticosterone ◽  
Experimental Results ◽  
Recombinant Inbred Strains ◽  
Inbred Strains Of Mice

SUMMARY Plasma corticosterone levels were determined fluorometrically in mice of two unrelated highly inbred strains, C57BL/6By and BALB/cBy, and in seven of their derived recombinant-inbred strains as well as their F1 hybrid and backcross generations necessary to arrive at a genetic model for plasma corticosterone levels. It was concluded that the simplest genetic model, and one which fits the experimental results, was one which assumed that plasma corticosterone levels are controlled genetically by two loci with the epistatic interaction indicating dependency of pathways of action for the two genes.

Genetic Analysis of Half Diallel Matting with Different Methods and their Comparisons for Yield and its Associated Traits in Sunflower under Saline Soil Stress Conditions

Helia ◽  
2017 ◽  
Vol 40 (66) ◽  
Author(s):  
Mohamed Ali Abd El-Satar
Keyword(s):  
Genetic Analysis ◽  
Agricultural Research ◽  
Saline Soil ◽  
Block Design ◽  
Diallel Cross ◽  
Head Diameter ◽  
Physiological Maturity ◽  
Randomized Complete Block Design ◽  
Soil Stress ◽  
Half Diallel

AbstractA half diallel cross between five divergent sunflower genotypes was evaluated under two contrast locations of Kafr El-Hamam (fovourable soil as a control) and Tag Al-Ezz (as salt affected soil) Agricultural Research Stations using randomized complete block design with three replications. High significance variation among genotypes and their components was detected for all studied traits at both and combined locations. Selection in early generations would be effective at both locations for improving days to 50 % flowering, days to physiological maturity, plant height, head diameter, No. of green leaves plant

scholarly journals LOW ASSOCIATION OF Bph17 ALLELE IN LANDRACES AND IMPROVED VARIETIES OF RICE RESISTANT TO BROWN PLANTHOPPER

2017 ◽  
Vol 18 (1) ◽  
pp. 1
Author(s):  
Wage Ratna Rohaeni ◽  
Untung Susanto ◽  
Aida F.V. Yuningsih
Keyword(s):  
Brown Planthopper ◽  
Gene Marker ◽  
Specific Gene ◽  
Rice Varieties ◽  
Improved Varieties ◽  
Recessive Genes ◽  
Check Variety ◽  
Rice Genotypes ◽  
Brown Planthopper Resistance ◽  
Dominant Genes

<p>Resistance traits to brown planthopper on rice varieties are controlled by dominant and recessive genes called Bph/bph. Bph17 is one of dominant genes that control rice resistance to brown planthopper.  Marker of Bph17 allele can be used as a tool of marker assisted selection (MAS) in breeding activity. Association of Bph17 allele and resistance to brown planthopper in Indonesian landraces and new-improved varieties of rice is not clearly known. The study aimed to determine the association of Bph17 allele in landraces and new-improved varieties of rice resistant to brown planthopper. Twenty-one rice genotypes were used in the study, consisting of 13 landraces, 5 improved varieties, 3 popular varieties and a check variety Rathu Heenati. Two simple sequence repeat markers linked to Bph17 allele were used, i.e. RM8213 and RM5953. The results showed that association of Bph17 allele in landraces and new-improved varieties of rice resistant to brown planthopper resistance was very low (r = -0.019 and -0.023, respectively). The presence of Bph17 allele did not constantly express resistance to brown planthopper. The study suggests that Bph17 allele cannot be used as a tool of MAS for evaluating resistance of landraces and new-improved varieties of rice to brown planthopper. Further research is needed to obtain a specific gene marker that can be used as a tool of MAS and applicable for Indonesian differential rice varieties. </p>

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