Morphometrical and acoustical comparison between diploid and tetraploid green toads
Morphometrical and acoustical comparison between diploid and tetraploid green toads
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DOI：
10.1111/j.1095-8312.1998.tb01517.x
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发表时间：
1998-02-01
影响因子：
1.9
通讯作者：
Balletto, E
中科院分区：
文献类型：
--
作者：
Castellano, S;Giacoma, C;Balletto, E
本文对采自哈萨克斯坦南部和吉尔吉斯斯坦北部12个繁育群体的158只雄性青蛙(Bufo Viridis Complex)的形态特征和声学特性进行了比较。3个种群的样品仅产生二倍体(2n=22)，8个种群的样品仅产生四倍体(2n=44)，而在一个地点采集到二倍体、四倍体和多个三倍体的样品。二倍体比四倍体和三倍体具有更大的体型和更大的头部和更短的四肢比例，而三倍体和四倍体的形态测量学没有明显的差异。二倍体广告呼叫具有与三倍体和四倍体广告呼叫显著不同的光谱和时间特性。特别是，二倍体比四倍体产生更长的叫声，具有更高的脉率和更低的频率。我们讨论了可能导致这些差异的因素的问题，并讨论了四个假设：(1)多倍体突变的直接影响，(2)遗传漂移，(3)生殖性状移位和(4)环境选择。(C)1998年伦敦林尼安协会。
In the present paper we compare, on the basis of morphometrical characters and acoustical properties of the advertisement calls, a sample of 158 male green toads (Bufo viridis complex) collected in 12 breeding populations of south Kazakstan and north Kyrgyzstan. The samples of three populations resulted in only diploid loads (2n=22), those of eight populations in only tetraploid toads (2n=44) whereas in one locality diploid, tetraploid and many triploid toads were collected. Diploid toads show significantly larger body size and proportionally larger head and shorter limbs than both tetraploids and triploids, whereas no evident morphometrical differences were observed between triploids and tetraploids. Diploid advertisement calls have spectral and temporal properties that significantly differ From those of both triploid and tetraploid advertisement calls. In particular, diploids produce significantly longer calls with higher pulse-rates and lower Frequencies than those of tetraploids. We address the question of the factors that could be responsible for these differences and we discuss four hypotheses: (1) the direct effect of polyploid mutation, (2) genetic drift, (3) reproductive character displacement and (4) environmental selection. (C) 1998 The Linnean Society of London.