Heterosis, General Combining Ability and Gene Action In Cotton (Gossyp ium Hirsaturn L.)

2007 ◽  
Vol 10 (1) ◽  
pp. 9A-18A
Author(s):  
Khalid mohammad Dawod ◽  
◽  
khalid khalil Al-Juboori ◽  
Keyword(s):  
Combining Ability ◽  
Gene Action ◽  
General Combining Ability

Combining ability and heterosis studyin maize inbreds throughout diallel mating design

2018 ◽  
Vol 43 (4) ◽  
pp. 599-609
Author(s):  
ANMS Karim ◽  
S Ahmed ◽  
AH Akhi ◽  
MZA Talukder ◽  
A Karim
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Combining Ability ◽  
Gene Action ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Gene Effects ◽  
Additive Type ◽  
Additive Gene ◽  
Ear Height

Combining ability effects were estimated for grain yield and some other important agronomic traits of maize in a 7×7 diallel analysis excluding reciprocals. The variances for general combining ability (GCA) were found significant for yield, days to pollen shedding, days to silking and ear height while it was found non-significant for plant height and number of kernels/ear. Non-significant general combining ability (GCA) variance for plant height and number of kernels/ear indicates that these two traits were predominantly controlled by non- additive type of gene action. Specific combining ability (SCA) was significant for all the characters except yield and days to silking. Non-significant specific combining ability (SCA) variance for yield and days to silking suggests that these two traits were predominantly controlled by additive type of gene action. Both GCA and SCA variances were found significant only in days to pollen shedding and ear height indicated the presence of additive as well as non additive gene effects for controlling the traits. However, relative magnitude of these variances indicated that additive gene effects were more prominent for all the characters studied except days to silking. Parent BIL95 was the best general combiner for both high yield and number of kernels/ear and parent BML4 for dwarf plant type. Two crosses (BML4× BML36 and BIL114× BIL31) exhibited significant and positive SCA effects for grain yield involved low × average and average × average general combining parents. The range of heterosis expressed by different crosses for grain yield and days to silking was from -65.83 to 21.26 percent and -17.85 to 8.22 percent, respectively.. The better performing three crosses (BIL114×BIL31, BIL138×BIL95 and BIL31×BIL95) can be utilized for developing high yielding hybrid varieties as well as for exploiting hybrid vigour.Bangladesh J. Agril. Res. 43(4): 599-609, December 2018

scholarly journals Evaluation of inbred lines of maize (Zea mays L.) through line × tester method

2015 ◽  
Vol 39 (4) ◽  
pp. 675-683
Author(s):  
MN Amin ◽  
M Amiruzzaman ◽  
A Ahmed ◽  
MR Ali
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Combining Ability ◽  
Zea Mays L ◽  
Gene Action ◽  
Inbred Lines ◽  
General Combining Ability ◽  
Genotypic Differences ◽  
Mean Values ◽  
Wide Range

Maize inbred lines were evaluated by using line × tester method involving 11 lines and 3 testers for grain yield and its components through estimation of general combining ability (gca) and specific combining ability (sca) effects. Highly significant genotypic differences were observed indicated wide range of variability present among the genotypes. The crosses with high sca effect for grain yield were evolved from high × low general combiner parents which reveled additive × dominance type of gene action. The cross combinations 9MS4-1 × L22, 9MS4-1 × L486, 9MS4-2 × L431, 9MS4-11 × L486 and 9MS4- 15 × L431 with high positive sca effect having high mean values might be used for obtaining high yielding hybrids. The information on the nature of gene action with respective variety and characters might be used depending on the breeding objectives. DOI: http://dx.doi.org/10.3329/bjar.v39i4.22547 Bangladesh J. Agril. Res. 39(4): 675-683, December 2014

EVALUATION OF THE ASSUMPTIONS REQUIRED FOR THE GENETIC INTERPRETATION OF DIALLEL EXPERIMENTS IN SELF-POLLINATING CROPS

1977 ◽  
Vol 57 (4) ◽  
pp. 1185-1191 ◽  
Author(s):  
M. J. SOKOL ◽  
R. J. BAKER
Keyword(s):  
Combining Ability ◽  
Gene Frequency ◽  
Gene Action ◽  
Diallel Analysis ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Genetic Models ◽  
Gene Frequencies ◽  
Dominance Interaction ◽  
Genetic Interpretation

Simulation of two-locus genetic models was used to investigate the effects of gene frequency, non-random association of genes, and epistasis on the interpretation of diallel experiments in self-pollinating crops. It was demonstrated that general combining ability includes effects due to additive, epistatic, and, when gene frequencies are not equal to 0.5, dominance gene action. Similarly, when gene frequencies do not equal 0.5, average heterosis depends upon additive × dominance interaction as well as dominance and dominance × dominance interaction. Negative associations between genes greatly inflate the apparent amount of specific combining ability. These findings cast serious doubt on the utility of diallel analysis for studying the genetics of self-pollinating crops.

scholarly journals Grain Fe and Zn content, heterosis, combining ability and its association with grain yield in irrigated and aerobic rice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
G. Anusha ◽  
D. Sanjeeva Rao ◽  
V. Jaldhani ◽  
P. Beulah ◽  
C. N. Neeraja ◽  
...  
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Gene Action ◽  
General Combining Ability ◽  
Aerobic Conditions ◽  
Zn Content ◽  
Allelic Gene ◽  
Parental Lines ◽  
Growing Conditions

AbstractGenetic improvement of rice for grain micronutrients, viz., iron (Fe) and zinc (Zn) content is one of the important breeding objectives, in addition to yield improvement under the irrigated and aerobic ecosystems. In view of developing genetic resources for aerobic conditions, line (L) × tester (T) analysis was conducted with four restorers, four CMS lines and 16 hybrids. Both hybrids and parental lines were evaluated in irrigated and aerobic field conditions for grain yield, grain Fe and Zn content. General Combining Ability (GCA) effects of parents and Specific Combining Ability (SCA) effects of hybrids were observed to be contrasting for the micronutrient content in both the growing environments. The grain Fe and Zn content for parental lines were negatively correlated with grain yield in both the contrasting growing conditions. However, hybrids exhibited positive correlation for grain Fe and Zn with grain yield under limited water conditions. The magnitude of SCA mean squares was much higher than GCA mean squares implying preponderance of dominance gene action and also role of complementary non-allelic gene(s) interaction of parents and suitability of hybrids to the aerobic system. The testers HHZ12-SAL8-Y1-SAL1 (T1) and HHZ17-Y16-Y3-Y2 (T2) were identified as good combiners for grain Zn content under irrigated and aerobic conditions respectively.

scholarly journals Hybrid tea-roses under controlled light conditions. 4. Combining ability analysis of variance for percentage of flowering in F1 populations.

1980 ◽  
Vol 28 (1) ◽  
pp. 36-39
Author(s):  
D.P. de Vries ◽  
L. Smeets ◽  
L.A.M. Dubois
Keyword(s):  
Analysis Of Variance ◽  
Combining Ability ◽  
Gene Action ◽  
General Combining Ability ◽  
Light Conditions ◽  
Additive Gene Action ◽  
Combining Ability Analysis ◽  
Growth Room ◽  
Additive Gene ◽  
Flowering Ability

F1 populations of the hybrid tea-roses Sonia, Baccara, Ilona, Prominent and Zorina were grown in a growth room under 8 W/m2 at 20 deg C with an 8 h day. The inheritance of flowering ability under low irradiance was mainly controlled by additive gene action. Prominent and Zorina had a good general combining ability for flowering under low irradiance. [For part 3 see HcA 49, 5235]. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Heterosis and combining ability estimates for the total number of eggs laid per female in silkworm, Bombyx mori L.

2012 ◽  
Vol 30 ◽  
pp. 55-59
Author(s):  
H A Rashid ◽  
S M Rahman ◽  
M K Ahsan
Keyword(s):  
Bombyx Mori ◽  
Combining Ability ◽  
Gene Action ◽  
General Combining Ability ◽  
Yield Potential ◽  
Additive Gene Action ◽  
Ability Estimates ◽  
Diallel Crossing ◽  
Additive Gene ◽  
Silkworm Bombyx Mori

Heterosis and combining ability for total number of eggs laid per female silkworm Bombyx mori L were investigated in a six parent diallel crossing programme in four rearing seasons. Magnitude of heterosis varied from seasons to season and was not consistent over characters. Effect of season was important in the expression of genetic variances and other parameters studied. Considerable amount to heterosis was obtained in the crosses where parents Nistari Oval (G), BSRI-98 and BV-High were involved. Parental performance as judged by general combining ability quantities indicated that BSRI-98 was the best general combining parent in all the rearing seasons. The variance due to the specific combing ability (?2 sca) was higher than the general combining ability (?2gca) in all seasons, indicating the preponderance of non-additive gene action in inheritance of that trait. Majority of the crosses showing significant sca effects had either one or both the parents were good general combiners. Thus the combining ability of parents may be considered as a reliable guide in the prediction of the yield potential of those crosses. The crosses Nistari Oval (G)×BSRI-98, Nistari×BSRI-98 and BSRI-95× Nan Nung7B are recommended for the commercial exploitation of heterosis as an important egg producing breeds in majority of the rearing seasons.DOI: http://dx.doi.org/10.3329/ujzru.v30.10754 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 55-59

scholarly journals Combining Ability and Heterosis for Capsaicinoids in Capsicum pubescens

HortScience ◽  
2001 ◽  
Vol 36 (7) ◽  
pp. 1315-1317 ◽  
Author(s):  
Yayeh Zewdie ◽  
Paul W. Bosland ◽  
Robert Steiner
Keyword(s):  
Combining Ability ◽  
Recurrent Selection ◽  
Gene Action ◽  
Diallel Analysis ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Breeding Method ◽  
Additive Gene Action ◽  
Gene Effect ◽  
Additive Gene

The inheritance of capsaicinoid content was studied in five Capsicum pubescens Ruiz & Pav. genotypes using diallel analysis. General combining ability and specific combining ability effects were significant for all capsaicinoids studied, indicating additive and nonadditive gene actions are present. The association of high capsaicinoid contents with high positive general combining ability of the parents also indicates the predominance of additive gene action in capsaicinoid inheritance. Because of the predominant additive gene effect, recurrent selection would be a good breeding method to increase capsaicinoid level in the population studied. Heterosis was observed in hybrids for some of the capsaicinoids, suggesting that F1 hybrids could also be used to increase capsaicinoid content.

scholarly journals Analysis of Resistance to Eastern Filbert Blight in Corylus avellana

Plant Disease ◽  
1997 ◽  
Vol 81 (4) ◽  
pp. 388-394 ◽  
Author(s):  
N. K. Osterbauer ◽  
K. B. Johnson ◽  
S. A. Mehlenbacher ◽  
T. L. Sawyer
Keyword(s):  
Combining Ability ◽  
Gene Action ◽  
Disease Incidence ◽  
Exposure Period ◽  
Corylus Avellana ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Disease Response ◽  
Anisogramma Anomala ◽  
Eastern Filbert Blight

Inheritance of resistance to eastern filbert blight, caused by Anisogramma anomala, in European hazelnut (Corylus avellana) was evaluated in the progeny of seven cultivars crossed in 12 combinations. The progeny were subjected to inoculation with A. anomala in the greenhouse and in the field. Three disease responses were measured: disease incidence, number of cankers, and proportion of wood diseased. In both the greenhouse and the field, progeny produced by crossing VR6-28 with three susceptible cultivars segregated 1:1 for complete resistance to eastern filbert blight, confirming a previous report that VR6-28 is heterozygous for a single, dominant resistance gene. Histograms of disease responses in progeny of the remaining six parents showed continuous distributions for all crosses examined. Consequently, these parents were analyzed for general and specific combining abilities for each disease response. In the field, general and specific combining ability were both significant (P < 0.05) for all disease responses, with general combining ability having twice the magnitude of specific combining ability. These results suggest these disease responses are controlled by additive gene action in the cultivars examined, with nonadditive gene action being of some importance. Based on general combining ability values, high levels of partial resistance were transmitted by the pollen parents, Gem and Tonda di Giffoni, and the seed parent, Willamette. Heritability of disease incidence, number of cankers, and proportion of wood diseased were calculated to be 0.21, 0.39, and 0.47, respectively, for this set of nine crosses after the first exposure period in the field. This suggests that it will be possible to use partially resistant parents to breed for hazelnuts exhibiting fewer and smaller cankers.

HETEROSIS AND COMBINING ABILITY OF BARLEY HYBRIDS IN DENSELY AND WIDELY SEEDED CONDITIONS

1971 ◽  
Vol 51 (2) ◽  
pp. 115-122 ◽  
Author(s):  
T. C. YAP ◽  
B. L. HARVEY
Keyword(s):  
Combining Ability ◽  
Genetic Variance ◽  
Gene Action ◽  
Agronomic Traits ◽  
Unit Area ◽  
Heading Date ◽  
General Combining Ability ◽  
Hordeum Vulgare L ◽  
Additive Gene Action ◽  
Additive Gene

All possible crosses were made among the four commercial barley (Hordeum vulgare L. emend. Lam.) cultivars, ’Conquest’, ’Gait’, ’Jubilee’ and ’Olli’, and evaluated under space-seeded (12 seeds/3.66 m × 0.61 m) and densely seeded (250 seeds/4.88 m × 0.15 m) conditions. For the six agronomic traits measured, no substantial heterosis was found. The number of heads per unit area was consistently correlated with grain yields. Heading date and plant height showed similar trends in both tests, whereas grain yield and the components of yield showed different behavior in the two tests. The major portion of the genetic variance for the traits measured was due to variation in general combining ability, indicating that additive gene action was more important than non-additive gene action. Moreover, general combining ability effects were less susceptible to environment than the specific combining ability effects.

scholarly journals Daya gabung dan aksi gen komponen hasil jagung profilik hasil tinggi menggunakan analisis line X tester

Jurnal Agro ◽  
10.15575/9209 ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 113-129
Author(s):  
Roy Efendi ◽  
Slamet Bambang Priyanto ◽  
Muhammad Azrai
Keyword(s):  
Combining Ability ◽  
Gene Action ◽  
General Combining Ability ◽  
Yield Component ◽  
High Yield ◽  
Main Role ◽  
Lattice Design ◽  
Maize Varieties ◽  
Hybrid Maize ◽  
Two Stages

Peningkatan produktivitas jagung dapat dilakukan melalui perakitan varietas jagung yang memiliki tingkat prolifikasi tinggi. Ketersediaan galur-galur yang memiliki tingkat prolifikasi tinggi dan daya gabung yang baik akan memberikan peluang besar dalam perakitan jagung hibrida prolifik dengan hasil tinggi. Penelitian ini bertujuan memilih galur-galur prolifik yang memiliki daya gabung yang baik pada karakter prolifikasi dan mengevaluasi tingkat prolifikasi dan produktivitas jagung hibrida yang dibentuk dari galur-galur tersebut serta mengetahui aksi gen yang berperan pada karakter komponen hasil. Percobaan dilakukan dua tahap yaitu pembentukan hibrida dari galur-galur prolifik dengan metode testcross dan evaluasi hibrida yang terbentuk dengan menggunakan rancangan alfa lattice dengan tiga ulangan. Hasil penelitian menunjukkan galur G7 memiliki nilai daya gabung umum yang baik untuk karakter persentase tanaman prolifik. Hibrida G35/G102612 merupakan hibrida uji dengan persentase tanaman prolifik tertinggi 55,8%. Hibrida G7/Mal03 dengan hasil biji 12,9 t ha-1 dan persentase tanaman prolifik 53,9% merupakan jagung hibrida prolifik dengan hasil tinggi. Aksi gen non aditif lebih berperan dalam penampilan karakter komponen hasil pada jagung prolifik.AbstractMaize productivity can be increased by improving maize varieties with high prolificacy. The adequate of high prolificacy lines with a good combining ability will provide great opportunities to form a high yield prolific maize. The research aimed to select the prolific line which has good combining ability on the prolificacy and evaluate the prolificacy and productivity of the hybrid maize from these lines and to know the gene action which plays role in the yield component characters. The research was carried out in two stages, i.e. the formation of hybrids from the prolific line using the testcross method and evaluation of hybrids using the alpha lattice design with three replications. The results showed that line G7 had a good general combining ability for the percentage of prolific plants. Hybrid G35/G102612 was the test hybrid with the highest percentage of prolific plants of 55,8%. Hybrid G7/ Mal03 which had the yield of 12,9 t ha-1and percentage of prolific plants 53,9% was the prolific hybrid maize with the high yield. The non-additive effect played the main role for yield component characters of prolific hybrid maize.

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