New composite traits for joint improvement of milk and fertility trait in Holstein dairy cow

다국어 초록 (Multilingual Abstract)

Objective: The objective of this study was to define a new composite trait for Holstein dairy cows and evaluate the possibility of joint improvement in milk and fertility traits. Methods: A data set consisting 35,882 fertility related records (days open [DO], calving interval [CI], and number of services per conception [NSC], and total milk yield in each lactation [TMY]) was collected from 1998 to 2016 in Polish Holstein-Friesian breed herds. In this study TMY, DO, CI, and lactation length of each cow was used to obtain composite milk and fertility traits (CMF). Results: Moderate heritability (0.15) was estimated for composite trait that was higher than heritability of female fertility related traits: DO 0.047, CI 0.042, and NSC 0.014, and slightly lower than heritability of TMY 0.19. Favourable genetic correlations (-0.87) were estimated between CMF with TMY. Spearman rank correlation coefficients between breeding value of CMF with DO, CI, and TMY were high (>0.94) but with NSC were moderate (0.64). Selection on CMF caused favourable correlated genetic gains for DO, CI, and TMY. Different selection indices with different emphasis on fertility and milk production were constructed. The amount of correlated genetic gains obtained for DO and total milk production according to selection in CMF were higher than of genetic gains obtained for DO and TMY in selection indices with different emphasis on milk and fertility. Conclusion: The animal selection only based on a composite trait - CMF proposed in current study would simultaneously lead to favourable genetic gains for both milk and fertility related traits. In this situation CMF introduced in current study can be used to overcome to limitations of selection index and CMF could be useful for countries that have problems in recording traits, especially functional traits.

참고문헌 (Reference)

1 Pryce JE, "World trends in dairy cow fertility" 2014

2 Chesnais JP, "Using genomics to enhance selection of novel traits in North American dairy cattle" 99 : 2413-2427, 2016

3 Connor EE, "Use of residual feed intake in Holsteins during early lactation shows potential to improve feed efficiency through genetic selection" 91 : 3978-3988, 2013

4 Moxley JE, "Survey of milking hygiene practices and their relationships to somatic cell counts and milk production" 61 : 1637-1644, 1978

5 Ghiasi H, "Selection strategies for fertility traits of Holstein cows in Iran" 152 : 11-15, 2013

6 González-Recio O, "Selection for female fertility using censored fertility traits and investigation of the relationship with milk production" 89 : 4438-4444, 2006

7 Herd RM, "Reducing the cost of beef production through genetic improvement in residual feed intake: Opportunity and challenges to application 1" 81 (81): E9-E17, 2003

8 PFHBiPM, "Polish federation of cattle breeding and dairy farmers. Annual report of tasks realized in milk recording and dairy cattle breeding in 2017"

9 Egger-Danner C, "Invited review : Overview of new traits and phenotyping strategies in dairy cattle with a focus on functional traits" 9 : 191-207, 2014

10 Fraslin C, "How to genetically increase fillet yield in fish : New insights from simulations based on field data" 486 : 175-183, 2018

11 Fossceco SL, "Heritabilities and genetic correlations of body weight, testis growth and ewe lamb reproductive traits in crossbred sheep" 60 : 185-195, 1995

12 Nayeri S, "Genome-wide association for milk production and female fertility traits in Canadian dairy Holstein cattle" 17 : 75-, 2016

13 D.P. Berry, "Genetics and genomics of reproductive performance in dairy and beef cattle" Elsevier BV 8 (8): 105-121, 2014

14 Mallard BA, "Genetic selection of cattle for improved immunity and health" 63 : S37-S44, 2015

15 González-Recio O, "Genetic parameters for female fertility traits and a fertility index in spanish dairy cattle" 88 : 3282-3289, 2005

16 Kadarmideen HN, "Genetic parameters for body condition score and its relationship with type and production traits in Swiss Holsteins" 86 : 3685-3693, 2003

17 Wall E, "Genetic evaluation of fertility using direct and correlated traits" 86 : 4093-4102, 2003

18 Windig JJ, "Genetic correlations between milk production and health and fertility depending on herd environment" 89 : 1765-1775, 2006

19 Makgahlela ML, "Genetic correlations between female fertility and production traits in South African Holstein cattle" 37 : 180-188, 2007

20 Yamazaki T, "Genetic correlations among fertility traits and lactation persistency within and across Holstein herds with different milk production during the first three lactations" 219 : 97-103, 2019

21 Arthur PF, "Genetic and phenotypic variance and covariance components for feed intake, feed efficiency, and other postweaning traits in Angus cattle" 79 (79): 2805-2811, 2001

22 Pimentel ECG, "Exploration of relationships between production and fertility traits in dairy cattle via association studies of SNPs within candidate genes derived by expression profiling" 42 : 251-262, 2011

23 Cochran SD, "Discovery of single nucleotide polymorphisms in candidate genes associated with fertility and production traits in Holstein cattle" 14 : 49-, 2013

24 Snowder GD, "Composite trait selection to improve reproduction and ewe productivity : a review" 49 : 9-16, 2009

25 Snowder GD, "Composite trait selection for improving lamb production" 17 : 42-49, 2002

26 Nomura T, "Comparison of selection schemes for achieving desired genetic gains in closed broiler lines" 72 : 386-394, 2001

27 Sadeghi-Sefidmazgi A, "Breeding objectives for Holstein dairy cattle in Iran" 95 : 3406-3418, 2012

28 Gilmour AR, "ASReml user guide release 4.1 Structural specification"

29 Lin CY, "A simultaneous procedure for deriving selection indexes with multiple restrictions" 83 : 531-536, 2005

30 Famula TR, "A comparison of restricted selection index and linear programming in sire selection" 84 : 384-389, 1992