• Journal of Animal Science and Technology
• /
• v.54 no.2
• /
• pp.83-87
• /
• 2012

The purpose of this study was to estimate genetic parameters for productive traits in swine. Productive traits were considered on average daily gain (ADG), body height (BH) and body length (BL). Genetic analysis was consisted of 18,668 heads for productive traits which were based on on-farm performance tested from May, 2007 to Apr, 2011. For estimating genetic parameters on productive traits, single best model was fitted after finding source of variance on fixed and random effects and estimated with a multiple trait animal model by using DF-REML (Derivative-Free Restricted Maximum Likelihood). The estimated heritabilities of Duroc, Berkshire, Landrace and Yorkshire 0.22-0.58 for the average daily gain, 0.34-0.41 for the body height and 0.4-0.52 for the body length, respectively. Phenotypic correlations of average daily gain with body height and body length for the four breeds were 0.42-0.48, 0.53-0.58, 0.34-0.46 and 0.47-0.56, respectively. Phenotypic correlations of body height with body length were 0.41, 0.57, 0.52, 0.59, respectively. The estimated genetic correlation coefficients of average daily gain with body height and body length estimated for the four breeds were 0.34-0.47, 0.70-0.75, 0.17-0.38 and 0.50-0.53, respectively. The estimated genetic correlation coefficients of body height with body length were 0.57, 0.69, 0.61 and 0.71, respectively.

• Journal of Korean Society of Forest Science
• /
• v.74 no.1
• /
• pp.61-66
• /
• 1986

This study was conducted to estimate the heritabilities of height and stem diameter growth in 5- and 6-year-old Pinus koraiensis. Estimates of individual tree and family heritability for height growth were $h^2_I=0.40$, $h^2_F=0.77$ in 5-year-old and $h^2_I=0.57$, $h^2_F=0.89$ in 6-year-old, respectively. Heritabilities for diameter growth were estimated as $h^2_I=0.16$, $h^2_F=0.53$ and $h^2_I=0.26$, $h^2_F=072$ in 5-and 6-year-old seedlings.

• Korean Journal of Plant Resources
• /
• v.14 no.3
• /
• pp.183-187
• /
• 2001

In order to obtain basic information for breeding varieties of Alisma plantago which is suitable for the southern part of Korea, nine local varieties were grown and yield components of plant were observed from Jun. 1999 to Dec. 1999 at farm field of Chonnam Sunchon Korea. Alisma plantago cv. Sunwol showed higher dry root yield than the other varieties used in the experiment. It showed relatively higher length of plant height and lower numbers of floral axis. Therefore, it was concluded that Sunwol was the most suitable variety with high yield and low floral axis at the southern part of Korea. The heritabilities of all observed characters were estimated to be large. Dry root yield was shown highly significant positive correlations with plant height and numbers of leaves. Dry root yield, plant height and numbers of leaves were shown negative correlation with number of floral axis and nursery leaves.

• Journal of Animal Science and Technology
• /
• v.46 no.2
• /
• pp.145-154
• /
• 2004

This study was conducted to estimate genetic parameter of Duroc, Landrace and Yorkshire breeds based on the on-farm performance tested records of 57,316 pigs under the supervision of Korean Animal Improvement Association from 1992 to 1999. Genetic parameters were estimated with a multiple trait animal model by using DF - REML. The result obtained in this study was summarized as follow ; The estimated heritabilities of Duroc, Landrace and Yorkshire were 0.46${\sim}$0.65 for the average backfat thickness, 0.28${\sim}$0.31 for loin depth, 0.50～0.60 for percent lean, 0.45${\sim}$0.55 for the average daily gain, 0.38${\sim}$0.50 for age at 90kg, respectively. Phenotypic correlation of average backfat thickness with loin depth, percent lean, average daily gain and age at 90㎏ for the three breeds were -0.12${\sim}$-0.01, -0.81${\sim}$-0.76, 0.34${\sim}$0.46, and -0.41${\sim}$-0.33, respectively. Phenotypic correlation of loin depth with percent lean, average daily gain and age at 90kg were 0.12${\sim}$0.23, 0.03${\sim}$0.21, and -0.17${\sim}$-0.03, respectively. Phenotypic correlation of percent lean with average daily gain and age at 90kg were -0.37${\sim}$-0.26 and 0.26～0.35, respectively. Phenotypic correlation of average daily gain with age at 90kg was -0.97${\sim}$-0.95. The estimated genetic correlation coefficients of average backfat thickness with loin depth, percent lean, average daily gain and age at 90kg estimated for the three breeds were -0.17${\sim}$0.03, -0.79${\sim}$-0.69, 0.24${\sim}$0.45 and -0.41${\sim}$-0.19, respectively. The estimated genetic correlation coefficients of loin depth with percent lean, average daily gain and age at 90kg were 0.11～0.19, 0.23 and -0.30～-0.20, respectively. The estimated correlation coefficients of percent lean with average daily gain and age at 90kg were -0.36${\sim}$-0.13 and 0.10～0.34, respectively. The estimated genetic correlation coefficients of average daily gain with age at 90㎏ was -0.96${\sim}$-0.95.

• Korean Journal of Plant Resources
• /
• v.36 no.4
• /
• pp.369-380
• /
• 2023

Developing and breeding improved legume-based food resources require collecting useful genetic traits with heritability even though requiring some time-consuming, costly, and labor intensive. We attempted to infer heritability of nine genetic traits-days to flowering, days to maturity, period from flowering to maturity, the number of seeds per pod, 100-seeds weight, and four contents such as crude protein, crude oil, crude fiber, and dietary fiber-using 455 homologous chloroplast gene sets of six species of legumes. Correlation analysis between genetic trait differences and phylogenetic distance of homologous gene sets revealed that days to flowering, the number of seeds per pod, and crude oil content were influenced by genetic factors rather than environmental factors by 62.86%, 69.45%, 57.14% of correlated genes (P-value ≤ 0.05) and days to maturity showed intermediate genetic effects by 62.42% (P-value ≤ 0.1). The period from flowering to maturity and 100-seeds weight showed different results compared to those of some previous studies, which may be attributed to highly complicated internal (epistatic or additive gene effects) and external effects (cultural environment and human behaviors). Despite being slightly unexpected, our results and method can widely contribute to analyze heritability by including genetic information on mitochondria, nuclear genome, and single nucleotide polymorphisms.

• 종축개량
• /
• v.12 no.2 s.72
• /
• pp.30-36
• /
• 2007

• Management & Information Systems Review
• /
• v.35 no.3
• /
• pp.95-113
• /
• 2016

The study examines the question of what discriminant factors may affect differences between two groups classified by researchers' satisfaction with and continuous use intention of genetic resources(microorganisms). Survey data from researchers who are using microorganisms from a gene bank was used to empirically test. The survey, covering 150 researchers, was conducted from March 26 through April 17 2015. Linear discriminant analysis was used to test the research questions described in the study. Results from the tests show that utilization value and suitability of genetic resources for researchers' R&D activities play key roles in discriminating between the two groups classified by researchers' satisfaction with and continuous use intention of genetic resources, relatively lower and higher groups. The results indicate that useful trait information of and degree in promotion of researches by genetic resources appear to be weak in discriminating between the two groups, and that novelty of genetic resources does not play a crucial role in making a distinction between the two groups. We propose some policy implications based on the results of the study.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.24 no.1
• /
• pp.78-83
• /
• 1979

Eight characters namely stalk length of trifoliate, stalk length of terminal leaflets, length of terminal leaflets, width of terminal leaflets, area of terminal leaflets, length of laternalleaflets, width of laternal leaflets, area of laternal leaflets in leaf parts of soybeans were measured to estimate the heritability values in percentage and relationships between those characters. Five parents and six different $_{x}\textrm{F}_2 generations and two backcross generations were used as the materials. The results obtained are summarized as follows: 1. Eight quantitative characters were differ from varieties. and hybrids from different cross combinations. 2. Heritability values of stalk length were showed the lowest, values of leaf length were lower than those of leaf width in both of main leaflets and laternal leaflets, and other values of leaf area in main and laternal leaflets were showed the highest values. 3. It was also recognized that there were close relationships between leaf length and leaf area, leaf width and leaf area in main leaflets and laternal leaflets, and area of main leaflets and laternal leaflets. There was, however, no any relationship between stalk length and other characters, and between length and width of main leaflets and laternal leaflets.

• Journal of Embryo Transfer
• /
• v.11 no.1
• /
• pp.1-6
• /
• 1996

다배란 수정란이식(MOET)과 체외수정(IVF)기술을 이용한 육종체계에서 예상되는 유전적 개량량을 여러 집단의 크기에서 비교한 결과 체외수정기술이 MOET육종기술보다 특히 개량대상 유전력이 낮을때 훨씬 효율적으로 나타났다. 그러나 유전력이 높아지면 (h$^2$=0.3, 0.5), MOET와 IVF간의 상대적 차이는 미진하게 나타났다. 체외수정을 이용한 육종기술에서 암컷의 선발 강도는 대단히 높일 수 있는 반면 난자의 회수율이 많을수록 상대적으로 수컷에 대한 선발 강도는 낮아진다. 그 이유는 한 가계에서 근친을 피하기 위해 한 마리의 수컷만 선발해야 하므로 수소의 선발강도는 난자의 회수율이 높을수록 상대적으로 낮아진다. 여러 수준의 난자회수율(10, 20, 30, 50, 100)중에서 30일 때 가장 높은 유전적 개량을 나타내었다. (Key word: MOET, IVF,selection responses)

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.25 no.3
• /
• pp.15-20
• /
• 1980

Heritability of heading date, maturing date and culm length were high and the year variation was relatively low. Yield components were considerably low in heritability due to large year variation. Direct effects of number of spikes/$m^2$ and 1, 000 grain weight to yield were high. For improved selection efficiency, at least three years continuous evaluation of experiments would be desired.