Ishikawa A, Akadama I, Namikawa T, Oda S
Laboratory of Animal Genetics, Faculty of Agriculture, Nagoya University, Japan.
Jikken Dobutsu. 1989 Jul;38(3):231-7. doi: 10.1538/expanim1978.38.3_231.
Five male and 9 female house musk shrews (Suncus murinus) captured in Koralawella, Sri Lanka were acquired by our laboratory. One male and 3 females alone contributed to the development of a new laboratory line (SRI line). The SRI line has been maintained as a closed breeding colony consisting of more than 40 shrews. Gestation period and litter size at birth averaged 31.2 days (43 cases) and 2.4 (43 litters), respectively. The SRI line shrews were uniformly covered with light gray fur. The body weight and total length of adult shrews averaged 72.9 g and 23.9 cm in males, and 49.6 g and 21.0 cm in females. These data indicate a body size intermediate between BAN line shrews originating from Bangladesh and Nag or OKI line shrews from Japan. The SRI shrews are also characterized by having 30 chromosomes in diploid, being the smallest number in the entire species, whereas the otherlines (Nag, OKI and BAN) all have 40 chromosomes.
我们实验室获取了5只雄性和9只雌性的家麝鼩（Suncus murinus），它们是在斯里兰卡科拉勒韦拉捕获的。仅1只雄性和3只雌性参与培育了一个新的实验室品系（SRI品系）。SRI品系作为一个封闭繁殖群体维持下来，成员超过40只麝鼩。妊娠期和出生时的窝仔数平均分别为31.2天（43例）和2.4只（43窝）。SRI品系的麝鼩全身覆盖着浅灰色的毛。成年雄性麝鼩的体重和全长平均分别为72.9克和23.9厘米，成年雌性分别为49.6克和21.0厘米。这些数据表明其体型介于源自孟加拉国的BAN品系麝鼩和来自日本的Nag或OKI品系麝鼩之间。SRI麝鼩的另一个特征是其二倍体有30条染色体，这是整个物种中数量最少的，而其他品系（Nag、OKI和BAN）都有40条染色体。
