Characterization of two microsatellites in chicken monoamine oxidase A

doi:10.1111/j.1740-0929.2008.00575.x

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Wiley InterScience

Animal Science Journal

Volume 79 Issue 5, Pages 641 - 643

Published Online: 22 Aug 2008

The official journal of the Japanese Society of Animal Science

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RAPID COMMUNICATION

Characterization of two microsatellites in chicken monoamine oxidase A

Kyung-Won HONG, ¹* Miho INOUE-MURAYAMA, ^2† Akihiro NAKAMURA, ³ Kenji NAGAO ³ and Shin'ichi ITO ²

¹ The United Graduate School of Agricultural Science, Gifu University, Gifu, ² Faculty of Applied Biological Sciences, Gifu University, Gifu, and ³ Poultry Laboratory, Animal Husbandry Research Division, Aichi Agricultural Research Center, Aichi, Japan

Correspondence to Miho Inoue-Murayama, Wildlife Research Center, Kyoto University, Sakyo, Kyoto 606-8203, Japan. (Email: mmurayama@wrc.kyoto-u.ac.jp)

*Present address: Biomedical Education Center, Kyung Hee University, Seoul, Korea.

^† Present address: Wildlife Research Center of Kyoto University, Sakyo, Kyoto, Japan.

KEYWORDS

chicken • microsatellite • monoamine oxidase A • Nagoya breed

ABSTRACT

We surveyed two polymorphic microsatellites in a candidate gene for fear response, monoamine oxidase A (MAOA), in chicken. Two hundred and eighty chickens from five breeds (Nagoya, Mikawa, White Leghorn, White Plymouth Rock, and Rhode Island Red) were investigated. A thymine (T) repeat and an adenine (A) repeat were found on MAOA intron 4 (CMin4T) and intron 9 (CMin9A), respectively. Nine alleles (127-bp to 166-bp) in CMin4T and six alleles (184-bp to 198-bp) in CMin9A were detected. A 128-bp allele in CMin4T was observed in the Nagoya breed only, implying a highly useful marker for discriminating the Nagoya breed from other breeds. In addition, the Mikawa breed had the fixed 127-bp and 198-bp alleles in CMin4T and CMin9A, respectively. The Nagoya breed chickens show densely cowardly behavior, but the Mikawa breed chickens do not show the same behavior. The current results may indicate that MAOA is an informative candidate gene for breed difference.