• Title/Summary/Keyword: MATING

Search Result 1,002, Processing Time 0.021 seconds

Genetic evaluation of eggshell color based on additive and dominance models in laying hens

  • Guo, Jun;Wang, Kehua;Qu, Liang;Dou, Taocun;Ma, Meng;Shen, Manman;Hu, Yuping
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.33 no.8
    • /
    • pp.1217-1223
    • /
    • 2020
  • Objective: Eggshells with a uniform color and intensity are important for egg production because many consumers assess the quality of an egg according to the shell color. In the present study, we evaluated the influence of dominant effects on the variations in eggshell color after 32 weeks in a crossbred population. Methods: This study was conducted using 7,878 eggshell records from 2,626 hens. Heritability was estimated using a univariate animal model, which included inbreeding coefficients as a fixed effect and animal additive genetic, dominant genetic, and residuals as random effects. Genetic correlations were obtained using a bivariate animal model. The optimal diagnostic criteria identified in this study were: L🟉 value (lightness) using a dominance model, and a🟉 (redness), and b🟉 (yellowness) value using an additive model. Results: The estimated heritabilities were 0.65 for shell lightness, 0.42 for redness, and 0.60 for yellowness. The dominance heritability was 0.23 for lightness. The estimated genetic correlations were 0.61 between lightness and redness, -0.84 between lightness and yellowness, and -0.39 between redness and yellowness. Conclusion: These results indicate that dominant genetic effects could help to explain the phenotypic variance in eggshell color, especially based on data from blue-shelled chickens. Considering the dominant genetic variation identified for shell color, this variation should be employed to produce blue eggs for commercial purposes using a planned mating system.

The Breeding Ecology and Copulation Behavior of Eurasian Eagle Owls(Bubo bubo) (수리부엉이(Bubo bubo)의 번식생태 및 교미행동에 관한 연구)

  • Shin, Dong-Man;Paek, Woon-Kee
    • Korean Journal of Environment and Ecology
    • /
    • v.22 no.1
    • /
    • pp.59-65
    • /
    • 2008
  • This study is mainly focused on the mating of 9 couples of Eagle Owl Bubo bubo habitating in Paju, Ganghwa Island, Icheon, Sihwa Lake, Chungju. For this study, from 2005 to 2007, regular filming and mornitoring for the breeding ecology and copulation behavior of 9 couples of Eagle Owl in the nest and near area had been done. Clutches ranged in size from one to four eggs but averaged 2.27 eggs(n=15), hatching success rate was 71 %(n=34) and fledgling success rate was 83%(n=23). Through the filming and mornitoring, it was found that Eagle Owl continued to copulate each other even after hatching and kept its copulation until the chicks left their nest($7\sim8$ weeks after hatching). This copulation behaviour without fertilization seems to be done for confirming, maintaining and strengthening of pair-bond by the necessity of both male and female, and to aim at stable breeding of their chicks.

Quantitative Profiling of Dual Phosphorylation of Fus3 MAP Kinase in Saccharomyces cerevisiae

  • Hur, Jae-Young;Kang, Gum-Yong;Choi, Min-Yeon;Jung, Jin Woo;Kim, Kwang-Pyo;Park, Sang-Hyun
    • Molecules and Cells
    • /
    • v.26 no.1
    • /
    • pp.41-47
    • /
    • 2008
  • Mitogen-activated protein kinase (MAPK) signaling is a crucial component of eukaryotic cells; it plays an important role in responses to extracelluar stimuli and in the regulation of various cellular activities. The signaling cascade is evolutionarily conserved in the eukaryotic kingdom from yeast to human. In response to a variety of extracellular signals, MAPK activity is known to be regulated via phosphorylation of a conserved $T{\times}Y$ motif at the activation loop in which both threonine and tyrosine residues are phosphorylated by the upstream kinase. However, the mechanism by which both residues are phosphorylated continues to remain elusive. In the budding yeast, Saccharomyces cerevisiae, Fus3 MAPK is involved in the mating signaling pathway. In order to elucidate the functional mechanism of MAPK activation, we quantitatively profiled phosphorylation of the $T{\times}Y$ motif in Fus3 using mass spectrometry (MS). We used synthetic heavy stable isotope-labeled phosphopeptides and nonphosphopeptides corresponding to the proteolytic $T{\times}Y$ motif of Fus3 and accompanying data-dependent tandem MS to quantitatively monitor dynamic changes in the phosphorylation events of MAPK. Phosphospecific immunoblotting and the MS data suggested that the tyrosine residue is dynamically phosphorylated upon stimulation and that this leads to dual phosphorylation. In contrast, the magnitude of threonine phosphorylation did not change significantly. However, the absence of a threonine residue leads to hyperphosphorylation of the tyrosine residue in the unstimulated condition, suggesting that the threonine residue contributes to the control of signaling noise.

Genetic Analysis of Sexual Life Cycle in Heterothallic Saccharomycopsis lipolytica (Heterothallic Saccharomycopsis lipolytica의 유성생활환(有性生活環)의 유전적(遺傳的) 해석(解釋))

  • Cho, Seok-Gum;Chung, Dong-Hyo
    • Applied Biological Chemistry
    • /
    • v.29 no.1
    • /
    • pp.3-9
    • /
    • 1986
  • A yeast strains, CJ 2, CJ 7 and CJ 8, isolated from soil and contaminated choose, mated with authentic strains of Saccharomycopsis lipolytica and were identified as Saccharomycopsis lipolytica with mating A, B and B, respectively. The strain CJ 7 produced large amount of isocitric acid in glucose and n-hexadecane medium as compared with another strains. All strains produced larger amount of citric acid in n-hexadecane medium as compared with glucose medium, and citric acid production of diploids was greater than that of the parental haploid strains. The specific activity of isocitrate lyase in n-hexadecane grown cells was $15{\sim}20$ times greater than that in glucose-grown cells, but the specific activity of citrate synthetase was not so influenced by carbon source. Little correlation between citric acid production and the specific acitivity of these enzymes was noticed irrespective of strains and ploidy.

  • PDF

Reproductive Cycle of the Red Marbled Rockfish Sebastiscus tertius (붉은쏨뱅이(Sebastiscus tertius)의 생식 주기)

  • Lim, Sang-Gu;Kim, Kawang-Su;Kim, Chul-Won;Kim, Jung-Woo
    • Korean Journal of Fisheries and Aquatic Sciences
    • /
    • v.44 no.6
    • /
    • pp.701-708
    • /
    • 2011
  • The aim of the present study was to analyze the reductive cycle of the red marbled rockfish Sebastiscus tertius. The analysis was based on annual changes in the gonadosomatic index (GSI), the hepatosomatic index (HSI), histology of the gonadal structure, and plasma sex steroid hormone levels of adult fish from April 1997 to April 1998. GSI of females began to increase in February and peaked ($10.8{\pm}2.72$) in May. HIS levels ($3.41{\pm}0.49$) peaked in February and elevated plasma steroid hormones ($1.47{\pm}0.75$ ng/mL for estradiol-$17{\beta}$ ($E_2$) and $230.7{\pm}27.6$ pg/mL for testosterone (T)) were observed in April. However, in male fish, GSI levels started to increase in August and remained high until November ($0.21{\pm}0.05$). T levels were was also elevated in August and peaked in October ($188.1{\pm}43.5$ pg/mL) and November ($186.8{\pm}28.0$ pg/mL), but started to decline 1 month than the GSI. These results suggest that female ovoviviparious periods span from April to June and amle mating periods occur from November to February.

Calculating Cp of Position Tolerance when MMC Applied at Datum and Position Tolerance (데이텀과 위치공차에 최대실체조건이 적용되었을 경우의 위치공차의 Cp)

  • Kim, Jun-Ho;Chang, Sung-Ho
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.40 no.3
    • /
    • pp.1-6
    • /
    • 2017
  • Process capability is well known in quality control literatures. Process capability refers to the uniformity of the process. Obviously, the variability in the process is a measure of the uniformity of output. It is customary to take the 6-sigma spread in the distribution of the product quality characteristic as a measure of process capability. However there is no reference of process capability when maximum material condition is applied to datum and position tolerance in GD&T (Geometric Dimensioning and Tolerancing). If there is no material condition in datum and position tolerance, process capability can be calculated as usual. If there is a material condition in a feature control frame, bonus tolerance is permissible. Bonus tolerance is an additional tolerance for a geometric control. Whenever a geometric tolerance is applied to a feature of size, and it contains an maximum material condition (or least material condition) modifier in the tolerance portion of the feature control frame, a bonus tolerance is permissible. When the maximum material condition modifier is used in the tolerance portion of the feature control frame, it means that the stated tolerance applies when the feature of size is at its maximum material condition. When actual mating size of the feature of size departs from maximum material condition (towards least material condition), an increase in the stated tolerance-equal to the amount of the departure-is permitted. This increase, or extra tolerance, is called the bonus tolerance. Another type of bonus tolerance is datum shift. Datum shift is similar to bonus tolerance. Like bonus tolerance, datum shift is an additional tolerance that is available under certain conditions. Therefore we try to propose how to calculate process capability index of position tolerance when maximum material condition is applied to datum and position tolerance.

Effect of $CO_2$-treatment on Oviposition and Colony Development of the Bumblebee, Bombus ignitus (탄산가스 처리가 호박벌(Bombus ignitus)의 산란성 및 봉세발달에 미치는 효과)

  • 윤형주;김삼은;이상범;박인균
    • Korean journal of applied entomology
    • /
    • v.42 no.2
    • /
    • pp.139-144
    • /
    • 2003
  • The effect of $CO_2$-treatment on interrupting diapause of Bombus ignitus was examined to provide a means for year-round rearing of the bumblebee. When mated young queens were exposed to 65% or 99% $CO_2$ for 30 min daily during two consecutive days, oviposition rate increased to 75% and 77%, respectively, comparing 50% in $CO_2$-untreated queens. At the same time, the days needed to first oviposition shortened to 17-18 days in $CO_2$-treated queens, comparing to 30 days in $CO_2$-untreated queens. $CO_2$-treatment at the second day after mating was appropriate to the oviposition and colony development. $CO_2$-treatment showed a positive effect on the oviposition and colony development, but less than them of overwintered queen in numbers of produced progeny. It can be concluded that $CO_2$-treatment to B. ignitus is insufficient to produce commercial grade bumblebee colony in spite of its capability for promoting oviposition, because the treatment failed to form a big colony.

Estrous Response and Fertility in Postpartum Suckled Female Yaks (Bos grunniens) Treated with an Intravaginal Device Containing Progesterone(CIDR), Pregnant Mares' Serum Gonadotrophin and Prostaglandin Analogue

  • Zi, X.D.;Chang, S.;Lu, H.;Wang, X.
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.18 no.4
    • /
    • pp.470-474
    • /
    • 2005
  • The efficiency of a short-term treatment with an intravaginal device containing progesterone (CIDR) combined with pregnant mares' serum gonadotrophin (PMSG) and prostaglandin analogue ($PGF_{2\alpha}$) was evaluated for the induction of estrus, initiation of cyclic activity, and fertility in postpartum suckled yak cows. Seventy-five postpartum suckled yak cows were assigned to three treatments: (1) insertion of a CIDR intravaginal progesterone (1.9 g) (day 0), an administration of $PGF_{2\alpha}$ (0.2 mg i.m.) on day 6 and PMSG (1,000 IU i.m.) at the time of CIDR withdrawal on day 7 (CPP group, n=28); (2) an administration of $PGF_{2\alpha}$ (0.2 mg i.m.) on day 6 and PMSG (1,000 IU i.m.) on day 7 (PP group, n=21); (3) untreated animals served as the control (CG group, n=26). Seven yak bulls were placed in pastures with the cows for natural mating. Estrus rate in the CPP group (28/28) was higher (p<0.01) than in the PP group (6/21) and in the CG group (0/26) within 96 h after the end of treatment. The first service conception rate in the CPP group (21/28) was higher (p<0.01) compared with in the PP group (2/9) as judged by serum $P_4$ concentration $\geq$2.35 ng/ml on day 21 after breeding. It is concluded that a short-term progesterone treatment combined with PMSG and prostaglandin increased the proportion of yak cows that exhibited behavioral estrus with more synchronized estrus response and satisfactory conception rate in postpartum suckled yak cows.

Genetic Variation of the Beet Armyworm, Spodoptera exigua (Hubner), Populations in Korea Using Polymorphic Allozymes (다형 동위효소를 이용한 국내 파밤나방(Spodoptera exigua (Hubner)) 집단의 유전변이)

  • 강성영;김용균
    • Korean journal of applied entomology
    • /
    • v.40 no.3
    • /
    • pp.235-243
    • /
    • 2001
  • Genetic variation of the beet armyworm, Spodoptera exigua (Hubner), was analyzed by polymorphic allozymes. Field populations were subdivided by different hosts, geographical locations, and seasons. Estimated average heterozygosity ($0.443\pm$0.013) indicated high genetic variation in all field populations of S. exigua. There were significant inbreeding effects deviated from Hardy-Weinberg equilibrium in each of subpopulations. These significant nonrandom matings were caused by within-subpopulations probably due to sampling errors, but not by mating isolation among subpopulations. Wrights ($F_{ST}$ ) and Neis (D) genetic distances indicated little genetic differentiation among subpopulations, though some southern local subpopulations (Haenam and Sachon) were relatively different of northern subpopulations (Andong and Kunwi). Estimated number of migrants per generation was 5.9 among host subpopulations, 10.6 among geographical subpopulations, and 31.8 among seasonal subpopulations. These genetic analyses suggest that Korean S. exigua subpopulations have little genetic differentiation mostly due to their significant migratory capacity.

  • PDF

Estimation of Genetic Parameter and Growth Traits by Sex of Pacific Abalone, Haliotis discus hannai (북방전복 (Haliotis discus hannai) 의 성별에 따른 성장형질 및 유전모수 추정)

  • Park, Choul-Ji;Park, Jong-Won;Kim, Bo-Ra;Jeong, Kyu Hyeon;Kim, Young Jin;Son, Yoon Suk;Kim, Kyung Kil
    • The Korean Journal of Malacology
    • /
    • v.32 no.4
    • /
    • pp.249-254
    • /
    • 2016
  • The purpose of this study is to estimate genetic parameter and growth traits by sex of Pacific abalone, Haliotis discus hannai. The abalone 10 family produced using 1:1 mating system of male and female for analyses of sex ratio and growth traits (shell length, shell width, and total weight) by sex. Overall mean in phenotypic traits at 30-month-old showed 85.01 mm of shell length, 57.49 mm of shell width and 73.34 g of total weight respectively. The sex ratio (female : male) was 1:0.93 (n = 191:177). The values of growth traits by sex showed significant difference (P < 0.05). The each value of female growth traits were shown to be higher than the values of male growth traits. The heritability of growth traits by sex were estimated that the heritability of female growth traits are higher than male that. The results suggest a possibility of improving the growth of cultured abalone using selection breeding by sex.