Genetic parameters of the duration of fertility in hens

Beaumont, Catherine

doi:10.4141/cjas92-026

Cited by 19 publications

(19 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our heritability estimate for MD p (0.27 6 0.04) is close to the realised heritability of 0.21 obtained by , based on seven selection generations, but higher than the estimates of 0.15 obtained by Beaumont et al (1992) when averaged over estimation methods and generations. Our heritability estimate for H p (0.19) is close to the one (0.18) estimated by Beaumont (1992). The very high genetic correlations between MD, F and H found in our study were also observed by Beaumont (1992).…”

Section: Discussionsupporting

confidence: 86%

“…Our heritability estimate for H p (0.19) is close to the one (0.18) estimated by Beaumont (1992). The very high genetic correlations between MD, F and H found in our study were also observed by Beaumont (1992).…”

Section: Discussionsupporting

confidence: 86%

“…Authors who have studied the possibility of improving the duration of fertility by selection have primarily focused on the female component: , Beaumont (1992) and Brillard et al (1998) for the laying hen, and Tai et al (1994), Poivey et al (2001) and Cheng et al (2002 and2009) for the common duck. In the case of ducks bred by CB, selection can dramatically improve the number of fertile eggs after a single insemination (Cheng et al, 2002 and2009).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Inheritance of duration of fertility in female common ducks (Anas platyrhynchos) inseminated in pure breeding or in inter-generic crossbreeding with Muscovy drakes (Cairina moschata)

Brun

Mialon

Sellier

et al. 2012

Animal

View full text Add to dashboard Cite

Ducks (common, Muscovy and mule ducks) are the third most important bird species in animal production for human consumption worldwide. Our study aimed to improve the efficiency of mule duck breeding, thus contributing to the efficiency of food production in general. In the common duck, females can be bred either with males of the same species (i.e. in pure breeding (PB) subscript p) or in inter-generic crossbreeding (CB; subscript c) with Muscovy drakes to produce the hybrid mule duck. The aim of the present study was to estimate the genetic parameters of several indicators of duration of fertility, considered to be a trait of the female duck, within and between breeding schemes and, in particular, to estimate the purebred–crossbred genetic correlation (rgpc). These indicators were maximum duration of fertility (MD), that is, the time interval between insemination and the last fertilised egg, the number of fertile eggs (F) and of hatched ducklings (H) after a single artificial insemination (AI), and the fertility rate over days 2 to 12 after AI (F2,12), taking three sub-periods (F2,4,F5,8,F9,12) into account. A total of 494 females and 2655 inseminations were involved. PB resulted in longer duration of fertility (MDp= 8.1v.MDc= 6.4 days). Heritability (h2) was higher forMDp(estimate ± s.e.: 0.27 ± 0.04) than forMDc(0.15 ± 0.04), but both traits were highly correlated with each other (rgpc= 0.85 ± 0.07).FpandFchad similar heritability (h2around 0.24) and displayed a high genetic correlation (0.78 ± 0.07). The same was true forHpandHc(h2around 0.17 andrgpc= 0.88 ± 0.05). The heritability estimates were 0.24 ± 0.03 forF2,12pand 0.20 ± 0.04 forF2,12c, with a 0.80 ± 0.07 genetic correlation between each other. Permanent environmental effects influencedMDpfar less thanMDc,Fpless thanFc, butHpandHcto the same extent. The high values forrgpc(>0.78) indicated that the same genes are involved in the duration of fertility for both PB and CB. Unlike CB, initial fertility for PB (F2,4p) was not correlated to overall fertility rate and to duration of fertility and probably involves different genes, if any. In both breeding schemes, indirect selection onFwould be better than direct selection onHto improveH, and easier to implement than selection on MD. Moreover, any gain in one breeding scheme will have its correlated counterpart in the other one, because of the high values ofrgpc.

show abstract

Section: Discussionsupporting

confidence: 86%

Section: Discussionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Inheritance of duration of fertility in female common ducks (Anas platyrhynchos) inseminated in pure breeding or in inter-generic crossbreeding with Muscovy drakes (Cairina moschata)

Brun

Mialon

Sellier

et al. 2012

Animal

View full text Add to dashboard Cite

show abstract

“…So our question was to study the value of selection for an increased duration of the fertile period in order to reduce the frequency of the required AI. Previous results in domestic fowl have shown that selection for a longer fertile period is feasible [2,23,24]. Because of the possible negative consequences due to the genetic correlation between the duration of the fertile period and embryo death [2], an alternative model of selection for the duration of the fertile period was preferred, based on the number of hatched chicks after a single AI [3,5].…”

Section: Introductionmentioning

confidence: 99%

Selection responses for�the�number of�fertile eggs of�the�Brown Tsaiya duck (Anas platyrhynchos) after�a�single artificial insemination with�pooled Muscovy (Cairina moschata) semen

Cheng

Rouvier²,

Poivey³

et al. 2002

Genet. Sel. Evol.

View full text Add to dashboard Cite

-A seven-generation selection experiment comprising a selected (S) and a control (C) line was conducted with the objective of increasing the number of fertile eggs (F) of the Brown Tsaiya duck after a single artificial insemination (AI) with pooled Muscovy semen. Both lines consisted of about 20 males and 60 females since parents in each generation and each female duck was tested 3 times, at 26, 29 and 32 weeks of age. The fertile eggs were measured by candling at day 7 of incubation. The selection criterion in the S line was the BLUP animal model value for F. On average, 24.7% of the females and 15% of the males were selected. The direct responses to the selection for F, and correlated responses for the number of eggs set (Ie), the number of total dead embryos (M), the maximum duration of fertility (Dm) and the number of hatched mule ducklings (H) were measured by studying the differences across the generations of selection between the phenotypic value averages in the S and C lines. The predicted genetic responses were calculated by studying the differences between the S and C lines in averaged values of five traits of the BLUP animal model. The selection responses and the predicted responses showed similar trends. There was no genetic change for Ie. After seven generations * Correspondence and reprints E-mail: taichein@mail.ncku.edu.tw 598 Y.S. Cheng et al.of selection, the average selection responses per generation were 0.40, 0.33, 0.42, 0.41 genetic standard deviation units for F, M, Dm, and H respectively. Embryo viability was not impaired by this selection. For days 2-8 after AI, the fertility rates (F/Ie) were 89.2% and 63.8%, the hatchability rates (H/F) were 72.5% and 70.6%, and (H/Ie) were 64.7% and 45.1% in the S and C lines respectively. It was concluded that upward selection on the number of fertile eggs after a single AI with pooled Muscovy semen may be effective in ducks to increase the duration of the fertile period and the fertility and hatchability rates with AI once a week instead of twice a week.selection response / fertile egg / Brown Tsaiya / Muscovy / duck

show abstract

“…Previous observations in domestic fowl have established that selection favouring a longer fertile period is feasible (Pingel and of hatched chicks per hen (Pingel and Planert, 1978). An alternative model of selection based on the number of chicks hatched after artificial insemination has been proposed to overcome the negative consequences of the phenotypic and genetic correlations observed between the duration of the fertile period and embryo death (Beaumont, 1992;Beaumont et al, 1992). The number of chicks hatched depends on the number of eggs that are acceptable for incubation, the duration of the fertile period, and the probability of each embryo developing to hatching.…”

Section: Introductionmentioning

confidence: 99%

Physiological responses of hens divergently selected on the number of chicks obtained from a single insemination

Brillard¹,

Beaumont²,

Scheller³

1998

Reproduction

View full text Add to dashboard Cite

A series of experiments was conducted in domestic fowl to investigate the consequences of five generations of divergent selection for increased (L+) or decreased (L\m=-\) numbers of hatched chicks. After artificial insemination with pooled ejaculates within the same line (L+ males \m=x\L+ hens or L\m=-\males \m=x\L\m=-\ hens), significant differences were observed between L+ and L\m=-\ hens for mean fertility rates (L+ 94.8%, L\m=-\70.2%, P < 0.0001) and for effective and maximum duration of fertility (P < 0.00001). A comparison of the overall laying performance and shell quality between the two selected lines showed that L\m=-\hens laid fewer eggs than L+ hens (P < 0.00001) and L\m=-\ eggs had poorer shell quality (shell breaking strength) than L+ eggs (P < 0.00001).

show abstract

Genetic parameters of the duration of fertility in hens

Abstract: Beaumont, C. 1992. Genetic parameters of the duration of fertility in hens. Can. J. Anim. Sci. 72: [193][194][195][196][197][198][199][200][201]

Cited by 19 publications

References 19 publications

Inheritance of duration of fertility in female common ducks (Anas platyrhynchos) inseminated in pure breeding or in inter-generic crossbreeding with Muscovy drakes (Cairina moschata)

Inheritance of duration of fertility in female common ducks (Anas platyrhynchos) inseminated in pure breeding or in inter-generic crossbreeding with Muscovy drakes (Cairina moschata)

Selection responses for�the�number of�fertile eggs of�the�Brown Tsaiya duck (Anas platyrhynchos) after�a�single artificial insemination with�pooled Muscovy (Cairina moschata) semen

Physiological responses of hens divergently selected on the number of chicks obtained from a single insemination

Contact Info

Product

Resources

About