scholarly journals Combining Ability of Pod Yield and Related Traits of Groundnut (Arachis hypogaeaL.) under Salinity Stress

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Md. Abul Kalam Azad ◽  
Md. Shah-E-Alam ◽  
Md. Abdul Hamid ◽  
Mohd Y. Rafii ◽  
M. A. Malek
Keyword(s):  
Salinity Stress ◽  
Combining Ability ◽  
Recurrent Selection ◽  
Reciprocal Recurrent Selection ◽  
Yield Data ◽  
Gene Effects ◽  
Pod Yield ◽  
Transgressive Segregants ◽  
High Yielding Varieties ◽  
Pod Number

A study was performed using6×6F1diallel population without reciprocals to assess the mode of inheritance of pod yield and related traits in groundnut with imposed salinity stress. Heterosis was found for pod number and yield. Data on general and specific combining ability (gca and sca) indicated additive and nonadditive gene actions. The gca: sca ratios were much less than unity suggesting predominant role of nonadditive gene effects. Cultivars “Binachinabadam-2” and “Dacca-1” and mutant M6/25/64-82 had the highest, second highest, and third highest pod number, as well as gca values, respectively. These two cultivars and another mutant M6/15/70-19 also had the highest, second highest, and third highest pod yield, as well as gca values, respectively. Therefore, “Dacca-1”, “Binachinabadam-2”, M6/25/64-82, and M6/15/70-19 could be used as source of salinity tolerance. Cross combinations showing high sca effects arising from parents with high and low gca values for any trait indicate the influence of nonadditive genes on their expression. Parents of these crosses can be used for biparental mating or reciprocal recurrent selection for developing high yielding varieties. Crosses with high sca effects having both parents with good gca effects could be exploited by pedigree breeding to get transgressive segregants.

scholarly journals Identification of Heterotic Pairs by Full-Sib Reciprocal Recurrent Selection in Maize Synthetic Populations on Turda CompositeA(B)(2) x Turda CompositeB(A)(2)

2013 ◽  
Vol 70 (1) ◽  
pp. 208-213
Author(s):  
Andreea Daniela ONA ◽  
Ioan HAȘ ◽  
Ivan ILARIE ◽  
Voichița HAȘ ◽  
Nicolae TRITEAN ◽  
...  
Keyword(s):  
Recurrent Selection ◽  
Inbred Lines ◽  
Heterotic Group ◽  
Yield Potential ◽  
Reciprocal Recurrent Selection ◽  
Maize Breeding ◽  
Gene Effects ◽  
Synthetic Populations ◽  
Additive Gene ◽  
Selection Test

In the last 40 years, pre-breeding works induced, in more and more centers of maize breeding, full-sib reciprocal recurrent selection programmes to identify some heterotic pairs which can be sources for obtaining performance inbred lines. The aim is to identify the heterotic pairs with the best results according to the yield potential of maize, the breaking and falling resistance, and the grains moisture at the harvesting time. The creation programme of A and B composite population started at ARDS Turda in 1985. Inside of A composite came the next inbred lines: B73, A632, M117, TC209, T291, being from the B SSS heterotic group, and inside of B composite came the inbred lines Mo17, C103, TC 208, T248, W633, appreciated by us or being related to Lancaster Sure Crop heterotic group. The experimentation was done in two orientation comparative cultures, each one with 49 variants, in 4 repetitions; the comparative culture was a balanced quadratic grid of 7x7 type. From each culture were chosen the first six variants, which were evaluated according to the next characters: production potential, breaking and falling resistance, grains moisture at harvest. The presented results are a part from the second cycle of full-sib reciprocal recurrent selection. Test crosses and self-pollinations were made on plants from the two composites which had two cobs; on the first cob from A Composite realised the cross with the corresponding plant from the B Composite, and from the plant panicle of the B Composite was collected pollen to pollinate the chosen plant from the A Composite. At the both plants from the crossing, the second cob was self-pollinated and kept in reserve until 2010, when the test crosses was experimented and were selected the pairs with the best results according to the above characters. Using the full-sib reciprocal recurrent selection, we can successfully harnessing, simultaneously, the additive and non-additive gene effects.

scholarly journals Best linear unbiased prediction for genetic evaluation in reciprocal recurrent selection with popcorn populations

2013 ◽  
Vol 152 (3) ◽  
pp. 428-438
Author(s):  
J. M. S. VIANA ◽  
G. B. MUNDIM ◽  
R. O. DELIMA ◽  
F. F. E SILVA ◽  
M. D. V. DE RESENDE
Keyword(s):  
Zea Mays ◽  
Combining Ability ◽  
Recurrent Selection ◽  
Best Linear Unbiased Prediction ◽  
Unbiased Estimation ◽  
Reciprocal Recurrent Selection ◽  
Linear Unbiased Prediction ◽  
Best Linear Unbiased Estimation ◽  
Best Linear Unbiased ◽  
Unbiased Prediction

SUMMARYThe objective of the present study was to present the theory and application of best linear unbiased prediction (BLUP) in reciprocal recurrent selection (RRS). Seven progeny tests from two RRS programmes with popcorn (Zea mays L. ssp. mays [syn. Zea mays L. ssp. everta (Sturtev.) Zhuk.]) populations were conducted and analysed for expansion volume and grain yield. The interpopulation half- and full-sib family models were fitted using ASReml software. Half-sib selection is equivalent to selection for the general combining ability (GCA) of the common parents. With inbred full-sib progeny and BLUP analysis, it is possible to predict the general and specific combining ability effects. The standard error of prediction of the progeny effect was lower than the standard deviation of the best linear unbiased estimation (BLUE) estimate. For half- and full-sib RRS, the BLUE and BLUP provided highly correlated estimates of progeny genotypic values. The coincidence between selected parents ranged from 64 to 95%. With inbred full-sib progeny, the correlations between the BLUE of progeny genotypic values and the BLUP of GCA effects were lower. Consequently, the coincidence between selected parents was lower, ranging from 0 to 57%. The percentage of common selected inbred progeny based on the BLUE and BLUP of the progeny genotypic value ranged from 57 to 100%.

scholarly journals Combining ability and heterosis for fiber quality traits in cotton

2010 ◽  
Vol 62 (1) ◽  
pp. 3-16 ◽  
Author(s):  
Yuksel Bolek ◽  
Hatice Cokkizgin ◽  
Adem Bardak
Keyword(s):  
Combining Ability ◽  
Recurrent Selection ◽  
Fiber Quality ◽  
Block Design ◽  
Short Fiber ◽  
Quality Traits ◽  
Gene Effects ◽  
Fiber Quality Traits ◽  
High Fiber ◽  
Additive Gene

Combining ability and heterosis for fiber quality traits in cotton Combining ability analysis and heterosis for cotton fiber quality traits were studied in a set of diallel crosses involving eight cotton (Gossypium sp.) genotypes. Randomized complete block design was used to test 56 F1 and 8 parents for fiber quality traits; length (Len), strength (Str), micronaire (Mic), uniformity (Unf), elongation (Elg), spinning consistency index (Sci) and short fiber index (Sfi). Analysis revealed significant general combining ability (GCA) and specific combining ability (SCA) effects for all the traits and additive gene effects were important in the inheritance of the traits. Giza-45 had the highest GCA effects for Len, Sci, Unf and Elg while Is-4 had the highest Str value. Mic and Sfi values were lowest for Askabat-100 and Giza-45, respectively. The cross Cukurova-1518 × 108-F and Nazilli-84S × Askabat-100 had the lowest SCA effects for Mic and Sfi, respectively. The highest values for Len (Askabat-100 × 108-F), for Str (Acala Prema × 108-F), for Sci (Is-4 × Giza-45), for Unf (Stoneville-453 × Askabat-100) and for Elg (108-F × Is-4) were also obtained. Hybridizations among Askabat-100 × Nazilli-84S, Is-4 × Giza-45, Askabat-100 × Stoneville-453, Askabat-100 × Giza-45, Is-4 × 108F, Giza-45 × 108F, Giza-45 × Acala Prema, Nazilli-84S × Giza-45, Is-4 × Nazilli-84S and Acala Prema × Askabat-100 crosses yielded the best heterosis and heterobeltiosis values. Aforementioned parents and crosses could be utilized for further selection of high fiber quality and applying 3-way crosses or modified backcross or recurrent selection to genotypes having good combining ability would improve fiber quality.

scholarly journals GENE ACTION AND COMBINING ABILITY STUDY IN SESAME

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Mandakini Kabi ◽  
Bhabendra Baisakh ◽  
Manasi Dash ◽  
Swapan K Tripathy ◽  
S. Sahu ◽  
...  
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Seed Weight ◽  
Recurrent Selection ◽  
Gene Action ◽  
Reciprocal Recurrent Selection ◽  
Additive Variance ◽  
Plant Seeds ◽  
Additive Gene ◽  
100 Seed Weight

The study of gene action and combining ability have been conducted in 28 F1 cross combinations along with eight parents in 8x8 half-diallel scheme following Griffing’s Approach for 14 morphoeconomic traits including seed yield and oil content in sesame. The general combining ability (GCA) and specific combining ability (SCA) component of variation were significant for parents and crosses respectively for all characters except internode length for GCA indicating role of both additive and nonadditive gene action. However, higher proportion of SCA variance (?2 sca) than GCA variance (?2 gca) revealed preponderance of non-additive gene action for all characters except capsule length and capsule width under study. Further, variance due to dominance played a significant role than additive variance in all traits except capsule width and 100-seed weight. Nirmala is considered as the best general combiner owing to its higher estimate of gca effects for yield per plant, for days to maturity, plant height, branches per plant, capsules per plant, seeds per capsule, capsule length and 100-seed weight. Among cross combinations; Rama × GT-10, AT-382 × Krishna, AT-382 × Nirmala, Krishna × Nirmala, Krishna × Uma, Nirmala × Prachi and Prachi × Uma showed significantly higher sca effect for seed yield per plant in the desired direction indicating their merit for recovery of transgressive segregants for higher productivity following reciprocal recurrent selection.

Relative efficiency of the genotypic value and combining ability effects on reciprocal recurrent selection

2012 ◽  
Vol 126 (4) ◽  
pp. 889-899 ◽  
Author(s):  
José Marcelo Soriano Viana ◽  
Rodrigo Oliveira DeLima ◽  
Gabriel Borges Mundim ◽  
Aurinelza Batista Teixeira Condé ◽  
Aloisio Alcantara Vilarinho
Keyword(s):  
Combining Ability ◽  
Relative Efficiency ◽  
Recurrent Selection ◽  
Reciprocal Recurrent Selection

Genetics of weather fleck in Nicotiana tabacum

1983 ◽  
Vol 25 (2) ◽  
pp. 97-100 ◽  
Author(s):  
M. K. Aycock Jr.
Keyword(s):  
Nicotiana Tabacum ◽  
Recurrent Selection ◽  
Doubled Haploids ◽  
Reciprocal Recurrent Selection ◽  
Gene Effects ◽  
Population Means ◽  
Additive Gene Effects ◽  
Nicotiana Tabacum L ◽  
Resistant Lines ◽  
Additive Gene

A 2-year study was conducted to investigate additive, dominance, and epistatic gene effects for weather fleck in Maryland tobacco (Nicotiana tabacum L.). P1, P2, F1, F2, P1F1, and P2F1 population means from each of seven crosses were used to estimate gene effects. In general, additive gene effects were more important in the inheritance of weather fleck than dominance or epistatic effects; however, in three of the seven crosses dominance and (or) epistatic gene effects were important. Adequate additive gene effects were present in five of the seven crosses to allow considerable progress towards selection of more weather fleck resistant lines. In two families, because of significant epistatic gene effects, the development of weather fleck resistant lines could be accomplished by producing doubled haploids from desirable F1 plants or by using a reciprocal recurrent selection program.

Responses to selection and changes in combining ability after three cycles of a modified reciprocal recurrent selection in maize

Euphytica ◽  
2007 ◽  
Vol 157 (1-2) ◽  
pp. 185-194 ◽  
Author(s):  
Mateus Figueiredo Santos ◽  
Tassiano Maxwell Marinho Câmara ◽  
Gustavo Vitti Moro ◽  
Emiliano Fernandes Nassau Costa ◽  
Cláudio Lopes De Souza
Keyword(s):  
Combining Ability ◽  
Recurrent Selection ◽  
Reciprocal Recurrent Selection

scholarly journals RECIPROCAL RECURRENT SELECTION COMPARED TO WITHIN-STRAIN SELECTION FOR INCREASING RATE OF EGG LAY OF TRIBOLIUM UNDER OPTIMAL AND STRESS CONDITIONS

Genetics ◽  
1974 ◽  
Vol 77 (1) ◽  
pp. 143-161
Author(s):  
Fernando Orozco ◽  
A E Bell
Keyword(s):  
Recurrent Selection ◽  
Genetic Correlations ◽  
Stress Conditions ◽  
Strain Selection ◽  
Mild Stress ◽  
Additive Effects ◽  
Reciprocal Recurrent Selection ◽  
Severe Stress ◽  
Response Curves ◽  
Gene Effects

ABSTRACT A replicated comparison of reciprocal recurrent selection (rrs) based on crossbred performance and within strain-selection (wss) based on purebred performance was made in three diverse environments over ten generations for the improvement of a heterotic trait, 4-day virgin egg lay of Tribolium castaneum. A selection intensity of 20% based on performance in either an optimum (33°), a mild stress (38°), or a severe stress (28°) environment was applied uniformly. Periodically, the performance of each population was measured in all three environments to provide both direct and correlated responses.—Heritability of egg lay in the base population ranged from 0.36 ± 0.03 in optimum to 0.26 ± 0.03 in severe stress. Estimates of dominance effects assumed significant proportions in severe stress only. Genetic correlations for egg lay in diverse environments were large and positive (.6 to .8) .—Only in severe stress did the rrs response significantly exceed that for wss. Quadratic adjustments fitted t3 response curves revealed that small initial genetic gains under rrs were followed by significantly increasing rates of gain in late generations of selection. The reverse was true for wss. This and evidence from realized heritabilities and genetic correlations suggested that rrs had utilized both additive and dominance effects, but wss response was limited to additive effects.—These results agree with selection theory in demonstrating that purebred selection is mwe efficient than crossbred selection in utilizing additive gene effects. The latter method has merit when non-additive effects assume significant proportions, and this is the more probable case for severe stress conditions.

scholarly journals AN EXPERIMENTAL COMPARISON OF SELECTION ALTERNATIVES TO PLATEAUED RESPONSE

Genetics ◽  
1980 ◽  
Vol 94 (2) ◽  
pp. 477-496
Author(s):  
Wm P Brown ◽  
A E Bell
Keyword(s):  
Genetic Correlation ◽  
Recurrent Selection ◽  
Major Gene ◽  
Intraclass Correlation ◽  
Population Based ◽  
Experimental Comparison ◽  
Reciprocal Recurrent Selection ◽  
Gene Effects ◽  
Gene Segregation ◽  
Egg Number

ABSTRACT Three alteriiative selection methods for extending selection limits or breaking respome plateaus were compared over ten generations in a replicated model experiment using two unrelated populations of Drosophila melunoguster that no longer responded to purebred selection for high egg number, a heterotic pclygenic trait. The three methods were: (1) reciprocal recurrent selection (RRS) with selection within each of the plateaued populations based solely on crossbred performance, (2)a modification of reciprocal recurrent selection (MRRS) with selection within each population based on both purebred and crossbred performance, and (3)purebred selection within a new synthetic population formed by crossing the two plateaued populations.—Conflicting estimates were obtained for heritability of purebred egg number in each of the plateaued populations. The realized heritability values and estimates from diallel analyses indicated an absence ofadditive genetic variation for both populations; however, estimates from conventional intraclass correlation methods were positive. The diallel analyses revealed significant amounts of nonadditive gene effects for purebred egg number in each population, while the significant gene effects for crossbred egg numbers were additive. Estimates of the genetic correlation between purebred and crossbred egg number were negative (—0.85 ± 0.68 and -0.32 ± 0.25) for the two base populations.—All three alternatives to continued purebred selection gave significant responses, with the average gain pergeneration from MRRS being significantly superior to the other two methods. Observed purebred and crossbred responses under RRS were in agreement with quantitative genetic theory. Such was not the case for MRRS, which suggested the possibility of major gene segregation.—Evidence supparting a negative genetic correlation between purebred and crossbred performance and the possibility of overdominance is presented and discussed.

COMPONENTS OF GENETIC VARIATION FOR SOME QUANTITATIVE CHARACTERS IN DIPLOID COTTON (G. HERBACEUM L.)

1971 ◽  
Vol 13 (3) ◽  
pp. 499-504
Author(s):  
M. S. Patil ◽  
S. W. Mensinkai
Keyword(s):  
Recurrent Selection ◽  
Diallel Cross ◽  
Average Frequency ◽  
Reciprocal Recurrent Selection ◽  
Gene Effects ◽  
Additive Component ◽  
Boll Weight ◽  
Recessive Genes ◽  
Diploid Cotton ◽  
Seed Index

Genetic analysis of some quantitative traits of cotton through diallel cross technique revealed that both additive and dominant inheritance were important for all the seven characters studied excepting boll weight which showed predominantly nonadditive gene effects. However, the dominance component was higher than the additive component and overdominance was observed for all the seven characters studied. Therefore reciprocal recurrent selection is suggested for the improvement of yield in the present material.Heritability was relatively high for seeds per boll and lint index, medium for yield, and low for the remaining characters. The average frequency of positive and negative genes was asymmetrically distributed in the parents for all the seven characters. There were more dominant than recessive genes for all the characters except boll weight. The direction of dominance was positive for all the characters except yield and seed index. At least one group of dominant genes appeared to be responsible for the control of yield, boll number and seed index, while at least 5, 11 and 12 effective factors appeared to be controlling seeds per boll, lint index and lint per cent, respectively. But a large number of dominant factors was involved in the control of boll weight.

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