Coat characteristics of seasonal molting mammals reveal significant seasonal variation as an adaptive strategy to cope with seasonal climate changes. However, the adaptive significance of such morphological variation ...Coat characteristics of seasonal molting mammals reveal significant seasonal variation as an adaptive strategy to cope with seasonal climate changes. However, the adaptive significance of such morphological variation has not yet been addressed. We analyzed seasonal variation of microscopic indices of hair and skin of adult Siberian weasels (Mustela sibirica manchurica Brass) from the Tonghe forest area of the Xiaoxing’anling Mountains, Heilongjiang. Skins from 8 males and 8 females were collected from summer (July to September), and an additional 8 male and 8 females skins were collected from winter (November to December )(i.e., n=32). Morphological indexes included length and width of guard hair, cuticular scale patterns of guard hair, external and cross-section form of guard hair, and medullary characteristics. We found significant differences between winter and summer coat hair density, hair length, and proportion of medulla-absent part of guard hair. We discuss the adaptive mechanism of this seasonal variation.展开更多
为构建水貂脾脏组织全长cDNA文库,用TRIzol试剂从脾脏组织提取总RNA,采用SMART(switching mechanism at 5′end of RNA transcript)技术合成cDNA第1链,双链cDNA经LD-PCR(Long-distance PCR)扩增并经sfiⅠ酶切和过柱分级分离后,经sfiⅠ...为构建水貂脾脏组织全长cDNA文库,用TRIzol试剂从脾脏组织提取总RNA,采用SMART(switching mechanism at 5′end of RNA transcript)技术合成cDNA第1链,双链cDNA经LD-PCR(Long-distance PCR)扩增并经sfiⅠ酶切和过柱分级分离后,经sfiⅠ酶切的λTrip1EX2载体,经体外包装而成cDNA原始文库。该脾脏组织cDNA原始文库含有独立克隆数为1.4×106,重组率达91.2%。文库扩增后,滴度达1.07×109pfu/mL,插入cDNA长度为0.2~4.0 kb。展开更多
文摘Coat characteristics of seasonal molting mammals reveal significant seasonal variation as an adaptive strategy to cope with seasonal climate changes. However, the adaptive significance of such morphological variation has not yet been addressed. We analyzed seasonal variation of microscopic indices of hair and skin of adult Siberian weasels (Mustela sibirica manchurica Brass) from the Tonghe forest area of the Xiaoxing’anling Mountains, Heilongjiang. Skins from 8 males and 8 females were collected from summer (July to September), and an additional 8 male and 8 females skins were collected from winter (November to December )(i.e., n=32). Morphological indexes included length and width of guard hair, cuticular scale patterns of guard hair, external and cross-section form of guard hair, and medullary characteristics. We found significant differences between winter and summer coat hair density, hair length, and proportion of medulla-absent part of guard hair. We discuss the adaptive mechanism of this seasonal variation.
文摘为构建水貂脾脏组织全长cDNA文库,用TRIzol试剂从脾脏组织提取总RNA,采用SMART(switching mechanism at 5′end of RNA transcript)技术合成cDNA第1链,双链cDNA经LD-PCR(Long-distance PCR)扩增并经sfiⅠ酶切和过柱分级分离后,经sfiⅠ酶切的λTrip1EX2载体,经体外包装而成cDNA原始文库。该脾脏组织cDNA原始文库含有独立克隆数为1.4×106,重组率达91.2%。文库扩增后,滴度达1.07×109pfu/mL,插入cDNA长度为0.2~4.0 kb。