• Journal of Life Science
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• v.7 no.1
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• pp.59-65
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• 1997

In this experiment, gene actions were analysized for seven barley parents in order to obtain basic information on their genetic improvement by diallel crosses. The results obtained were summarized as follows. In analysis of variance, additive, dominant, maternal and reciprocal effects were observed significantly for culm length, tiller number, number of spiked per plant, culm diameter, awn length, leaf width, number of grains per spike, and 1000 grain weight. Over-dominance was shown by Vr-Wr graphic analysis in five characters such as tiller number, number of spikes per plant, length of flag leaf, number of grains per spike, and 1000 grain weight, and partial dominance in four characters such as culm length, culm diameter, awn length, and leaf width. Component of genetic varience analyzed for four characters such as culm diameter, awn length, length of flag leaf, and leaf width showed that additive effects were higher than dominant effects. Culm length, tiller number, number of spikes per plant, number of grains per spike, and 1000 grain weight showed dominant effects higher than additive effects. The narrow-sense heritability for awn length, leaf width, and number of grains per spike showed high values as more than 0.62, while broad-sense heritability for culm length, number of spikes per plant, culm diameter, awn length, leaf width, number of grains per spike, and 1000 grain weight showed high values as more than 0.65.

• Journal of Korean Society of Forest Science
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• v.83 no.2
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• pp.239-245
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• 1994

The broad sense heritability of height of clonal means was estimated from 18 clones out of 25 clones growing at four different sites, and it showed considerably high heritability of $H^2_{CM}=0.883$. Therefore if we select the best one clone(5% selection), the genetic gain of 35.3% which is equal to 1.02m in height is expected to attain. If we select the best two clones(10% selection), the genetic gain will be 25.6% which is equal to 0.74m in height. Because the trees are only 4-year-old, it is expected to show higher genetic gain than the current gain when the trees reach to the age of final selection.

• Journal of The Korean Society of Grassland and Forage Science
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• v.19 no.2
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• pp.177-182
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• 1999

This research was carried out in a farm situated in Malkara District of Tekirdag Province (Turkey) in 1994-95, and the effect of genotype and environmental conditions on some characters and variations of these characters in terms of silage yield in 8 dent corn varieties were determined. The results of this research showed that leaf weight, stem diameter, and silage yield had a low broad sense heritability while the number of leaves per plant had a high heritability. Yield performance of varieties varied to a significant degree because of variations in rainfall rate during the growing periods. Leaf number, silage yield, leaf weight, stem diameter, plant height and ear weight varied between 13.33-17.33 number, 8,443-11,114 ton/hec, 152.8-244.2 g, 2,615-2,965 cm, 216.5-252.5 g and 176.2-285.8 g, respectively.

• International Journal of Industrial Entomology and Biomaterials
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• v.5 no.1
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• pp.131-134
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• 2002

Mulberry being the only food of silkworm, Bombyx mori L., is of great economic importance to the silk industry, The success in cocoon production mainly depends on the supply of quality leaves in sufficient quantity. In mulberry, where the economic product is leaf, the uptake of nitrogen from soil is very heavy and high responses to application of nutrients have been reported. Nitrogen supports vegetative growth particularly the leaf biomass. Variation in nitrogen harvest index and other physiological and yield contributing traits were estimated in five mulberry genotypes. Considerable variation was observed for nitrogen harvest index, protein yield per plant and harvest index. The correlation studies indicated the protein yield per plant was significantly correlated with leaf yield, nitrogen content in leaf, nitrogen harvest index and harvest index. The broad sense heritability estimates revealed that harvest index showed highest heritability (88.07%) followed by nitrogen content (82.52%), protein yield (70.28%) and nitrogen harvest index (66.52%).

• Korean Journal of Breeding Science
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• v.40 no.1
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• pp.8-14
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• 2008

A complete diallel cross was performed to determine the inheritance of allelopathic potential and combining ability of six rice germplasm that showed different level of allelopathic potential against barnyardgrass. Parents and F1 of 30 crosses were assessed for allelophatic potential in field condition. Barnyardgrass (Echinochloa crus-galli (L.) Beauv. var. frumentaceae) was used for rice allelopathic potential indicator which was observed in height and shoot dry weight, then suppression percentage were calculated by comparing to barnyardgrass grown in control plot (no rice). It was found that general combining ability showed no significant effect, whereas specific combining ability and reciprocal effect were significant. Variance analysis confirmed that genetic control of allelopathic potential in rice against barnyardgrass was mostly directed by dominance gene effect. The dominant genes were associated with high allelopathic potential and recessive genes were associated with low allelopathic potential. Heritability in broad sense for barnyardgrass dry weight suppression was around 41%; whereas for barnyardgrass height suppression was 51%. However, heritability in narrow sense was very low. The finding suggests that accumulation of genes associated with allelopathic potential would be a strategy to develop promising varieties in reference with the specific combining ability of cross combinations.

• Journal of Sericultural and Entomological Science
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• v.10
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• pp.41-43
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• 1969

The experimental studies were intended to clarify the effects leaf yield calculations, and also aimed at estimating the heritabilities on some characters for the selection of desirable stocks of mulberry trees. The method of estimating heritabilities for the eight characters-branch length, node number, branch diameter, branch number per stock, total branch weight, old branch weight, new shoot and leaf weight, and leaf weight, was the variance components procedures in a replicated trial for the varietal lines. The results are summarized as follows: Means, variances and standard errors for the characters are shown in table 1, and the results of variance analyses are also shown in table 2. Heritability values of node number was the highest, and these of branch number per stock was the lowest, and these of other six characters were intermediate values. These all calculated heritability values were higher than anticipated. This was expected since these values, which were the broad sense heritability, contain the variance due to dominance and epistasis in addition to the additive variance.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.31 no.2
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• pp.179-185
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• 1986

This study was to compare year variations of heritability, phenotypic, genotypic and environmental correlations as well as pathway coefficients for main characters of tea tree to provide useful selection information for improving tea tree. The data collected from the performance yield trials from 1979 to 1981 were used in this study. I. The genetic variance of fresh fruit yielding, dryed fruit yielding and fresh weight of root was not only greatly varied with year, but also the largest among all characteristies studied. Other characteristics showed higher genetic variance than environmental variances, and year variances were not large. 2. Both year and variety x year interaction were highly significant sources of variation for all yield characteristics, and year variances were not large. 3. All characteristics showed high broad sense heritabilities, and the broad sense heritability was not varied with year. 4. The genetic correlation coefficients between fresh fruit yielding and dryed fruit yielding, fresh weight of root and Gigolpi, dryed weight of root and Gigolpi were positive, and the year variation was not large. S. The pathway coefficients of the character was not only greatly varied with year and the fresh weight of root affected directly on the Gigolpi.

• FLOWER RESEARCH JOURNAL
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• v.17 no.3
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• pp.179-184
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• 2009

The correlation and combining abilities related with plant spreading characteristics of plant height, plant width, stem length, internode length, number of stem, number of leaves, and number of flower were studied in the $F_1s$ of 10 crosses from the partial five-parent diallel cross in Petunia hybrida. The plant width showed highly positive correlation with internode length, and number of flower. The mean squares of general combining ability(GCA) and specific combining ability(SCA) were highly significant for plant width, number of stem, number of leaves, and number of flowers. The mean square values of GCA were greater than those of SCA for all the characters, showing preponderance of additive gene actions for these characters. The lines of D and I for plant width and length of stem showed relatively high GCA effects. The crosses of $D{\times}I$, $F{\times}I$, and $G{\times}I$ exhibited high SCA effects on plant width, especially $G{\times}I$ effected in internode length and number of flower. The broad sense heritability was generally high compared to narrow sense one. Plant width and stem length, and internode length related to spreading growth showed the higher heritability than the other characters in the broad and narrow sense.

• Journal of Practical Agriculture & Fisheries Research
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• v.3 no.1
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• pp.85-93
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• 2001

The inter-relationship and combining abilities of characters for leaf length, leaf width, branch number, leaf number, leaf area, fresh weight and dry weight were studied in the F₁ combination of 15 crosses from the partial six-parent diallel cross in Petunia hybrida. The leaf area, fresh weight and dry weight showed high positive correlation together with the other growth characters such as leaf length, leaf width, branch number, leaf number. The mean squares of general combining ability(GCA) and specific combining ability(SCA) were highly significant for all the growth characters. The estimates of variance components of SCA were greater than those of GCA for all the characters, showing preponderance of non-additive gene actions for these characters. GCA effect was high in the lines of D and G for leaf length and fresh weight, and in the lines of C and D for branch number, leaf number, leaf area and fresh weight. The crosses of D×E, D×G, and E×G exhibited high SCA effect for all the growth characters such as leaf length, leaf width, branch number, leaf number, leaf area, fresh weight, and dry weight. The broad sense heritability was generally high compared to narrow sense one in the 7 characters. The highest heritability of the broad and narrow sense was shown in the leaf width and dry weight.

• Journal of Practical Agriculture & Fisheries Research
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• v.3 no.1
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• pp.94-101
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• 2001

The correlation among days to germination, days to flower, days to seed ripening and number of seeds per a pod and their combining were studied in 15 F₁s from the partial six-parent diallel cross in Petunia hybrida. The days to flowering, days to germination and seed number per a pod showed high positive correlation together, however germination percentage and number of seed showed negative correlation with days to ability(SCA) were highly significant for all the characters. The estimates of variance components of SCA were greater than those of GCA for all the characters, showing preponderance of non-additive gene actions for these characters. The line of A and C showed relatively high GCA effect for days to germination and days to flower and the lines of C and G for germination, days to seed ripening and number of seeds per a pod. The crosses of D×G and E×F exhibited high SCA effect for decreasing days to flower and days to germination, and increasing germination percentage and number of seeds per a pod. The broad sense heritability was generally high compared to narrow sense one in the 5 characters. The higher heritability values of both broad and narrow sense were shown in the days to ripening and number of seeds per a pod.