Genetic structure of a wide‐spectrum chicken gene pool

Granevitze, Z.; Hillel, J.; Feldman, Marcus W.; Six, Adrien; Eding, Herwin; Weigend, Steffen

doi:10.1111/j.1365-2052.2009.01902.x

Cited by 45 publications

(39 citation statements)

References 20 publications

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“…This study presents clear evidence that red JF and chickens have not been genetically isolated since domestication, as suggested elsewhere (35,74,115,116). Previous studies have found evidence for introgression of gray JF, which would have further altered the genetic variation present in the domestic chicken.…”

Section: The Origins Of High Diversity In Chickenssupporting

confidence: 84%

The Differential Evolutionary Dynamics of Avian Cytokine and TLR Gene Classes

Downing¹,

Lloyd

O’Farrelly

et al. 2010

The Journal of Immunology

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Section: The Origins Of High Diversity In Chickenssupporting

confidence: 84%

The Differential Evolutionary Dynamics of Avian Cytokine and TLR Gene Classes

Downing¹,

Lloyd

O’Farrelly

et al. 2010

The Journal of Immunology

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“…Since studied GTs were considered to be well suited for the established animal model concerning the required phylogenetic (Granevitze et al, 2009;Lyimo et al, 2014) and performance divergence (Lieboldt et al, 2015), the present study was conducted to examine interactions between these GTs and long-term graded Arg supply serving as nutritional-environmental stress on growth development and performance of diverse purebred layer lines.…”

Section: Discussionmentioning

confidence: 99%

Effects of Long-term Graded L-arginine Supply on Growth Development, Egg Laying and Egg Quality in Four Genetically Diverse Purebred Layer Lines

et al. 2015

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The present study was conducted to examine effects of long-term graded L-arginine supply on growth development, egg laying and egg quality in four genetically diverse purebred layer lines. The study comprised a rearing trial from hatch to week 16 and a following laying performance trial from week 17 to 41. After hatch 150 oneday-old female chicks of each genotype were distributed to three diets. The experimental diets were equivalent to 70, 100 and 200% L-arginine of age-specific recommended level (National Research Council, 1994) and were offered ad libitum to chicks (hatch to week 7), pullets (week 8 to 16) and hens (week 17 to 41). However, hens' diets were quite low in crude protein. After a pre-laying period from week 17 to 21 thirty-six pullets of each group were used further in the laying performance trial. Independent of chicken's genetic background, insufficient L-arginine supply caused lower body weight, daily weight gain and daily feed intake during the rearing (p＜0.001) and induced lower laying intensity and daily egg mass production in the laying period (p＜0.05). Parameters fitted to Gompertz function suggested higher adult body weight in L-arginine supplemented birds compared to insufficient supplied ones (p＜ 0.01). Groups fed with insufficient L-arginine reached age of maximum daily weight gain later and showed lowest maximum daily weight gain (p＜0.001). As a consequence of limitations in dietary L-arginine and crude protein, high performing genotypes decreased strongly in body weight, daily feed intake and performance compared to the low performing genotypes. In conclusion, L-arginine modified the amount of weight gain and feed intake, especially in growing chicks and pullets independent of genetic background. The high performing hens were more nutritionally stressed than the low performing ones, because concentrations of dietary crude protein were relatively low.

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“…The well-known Bayesian clustering approach (Pritchard et al, 2000) detects the population structure based on the proposition of admixture between genetically divergent populations without a priori information of breeds (Allendorf et al, 2010;Tadano et al, 2011) and differs from traditional methods such as phylogenetic trees which assume genetic separation between breeds (Granevitze et al, 2009;Tixier-Boichard et al, 2009). The highest ΔK value was found at K＝2 (data not shown) according to Evanno et al (2005).…”

Section: Breed Relationship and Population Clusteringmentioning

confidence: 99%

Genetic Characterization of Taiwan Commercial Native Chickens Ascertained by Microsatellite Markers

et al. 2013

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Taiwan commercial native chickens have played a vital role in the domestic market due to Taiwanese traditional cooking style and culture. This study investigated the genetic characterization and population structure of 10 Taiwan commercial native chicken populations, together with two exotic breeds and one population of red jungle fowl, using 22 microsatellites. The results showed that Taiwan commercial native chickens generally harbored high genetic diversity but lower than that of red jungle fowl population in terms of number of alleles and gene diversity. The neighbor-joining tree revealed a poor resolution with only two branches showing bootstrap values above 70%. Based on Bayesian clustering approach, thirteen populations were inferred into eight distinct clusters namely Game bird, B strain, L2 strain, White Broiler and White Leghorn with an average proportion of membership higher than 0.90 and the values higher than 0.85 for red jungle fowl, Hakka chicken and Hakka strain while four remaining breeds were closely related together. The population structure showed Taiwan commercial native chickens are more admixed, in contrast to occidental highly productive breeds. The high genetic variation within breed as shown in the results of the analysis of molecular variance, facilitated by gene exchanges, did not allow discriminating in an efficient way. This suggests that the genetic pool of Taiwan commercial native chickens is well distributed among breeds and therefore there is a good potential for adaptation to new environmental conditions or markets. Some populations, namely L2 strain and B strain showed very high inbreeding coefficient and thus could be considered at risks. Therefore, management needs to be taken into account for the populations, to prevent inbreeding depression and maintain genetic diversity.Key words: Bayesian clustering approach, genetic diversity, microsatellite, population structure, Taiwan J. Poult. Sci., 50: 290-299, 2013 Introduction Chicken meat and egg play an important role in Chinese traditional cuisine in Taiwan. There was 40 to 50% chicken meat from imported exotic White broiler (USDA, 2006) while the remaining meat production comes from Taiwan commercial native chickens (TCOM). For instance, Red feathered and Black feathered chickens produce about 80% of TCOM and the remaining 20% comes from commercial slow-growing local breeds such as Silkies, Naked Neck, Game bird, Hakka chicken, Golden chicken and Classical chicken (Lee, 2006). Taiwan native chickens were frequently crossed with imported exotic breeds (broiler-type rooster) to produce TCOM and selected by local farmers for high body weight, feed efficiency and their ability to adapt to local conditions since 1960s (Lee, 2006).Genetic diversity of chicken genetic resources provides the basis for genetic improvement in order to increase productivity but also to adapt domestic populations to changes in production environments as well as in markets, management practices, and disease challenges Boettcher et al., 2010). Moreove...

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Genetic structure of a wide‐spectrum chicken gene pool

Cited by 45 publications

References 20 publications

The Differential Evolutionary Dynamics of Avian Cytokine and TLR Gene Classes

The Differential Evolutionary Dynamics of Avian Cytokine and TLR Gene Classes

Effects of Long-term Graded L-arginine Supply on Growth Development, Egg Laying and Egg Quality in Four Genetically Diverse Purebred Layer Lines

Genetic Characterization of Taiwan Commercial Native Chickens Ascertained by Microsatellite Markers

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