Morph-specific correlations between floral traits in a distylous Ophiorrhiza napoensis (Rubiaceae) population in southern China
Morph-specific correlations between floral traits in a distylous Ophiorrhiza napoensis (Rubiaceae) population in southern China
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中国南方二柱Ophiorriza napoensis（茜草科）种群花性状之间的形态特异性相关性
DOI：
10.1017/s0266467401001535
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发表时间：
2001
影响因子：
1.4
通讯作者：
J. Murata
中科院分区：
文献类型：
--
作者：
H. Kudoh;T. Sugawara;Sugong Wu;J. Murata
对中国广西德福自然动物保护区亚热带常绿森林中的二柱麦冬种群的两种花形态之间的花性状相关性进行了比较。共同主成分分析表明，花性状之间相关性的总体模式在研究群体中具有形态特异性。在两种形态中都发现花药高度和花冠筒长度之间存在强正相关（r > 0.9）。在长花柱变体中，柱头高度与花冠筒长度呈正相关（r = 0.843），但在短花柱变体中则不然（r = -0.018）。花形态特异性相关性表明传粉媒介的自然选择塑造了花性状之间的性状协方差。因为形态特异性相关性被表达为多个性状之间形态内变异的模式，所以负责柱头-花冠管相关性的推定基因不应与形态之间性器官互惠的超基因联系起来，但它们的表达仅限于长花柱形态。
Floral trait correlations were compared between the two flower morphs of a distylous Ophiorrhiza napoensis population in a subtropical evergreen forest at the Defu Natural Animal Preserve, Guangxi, China. Common principal component analyses indicated that overall patterns in correlations among floral traits were morph specific in the study population. Strong positive correlations (r > 0.9) between anther height and corolla-tube length were found in both morphs. Stigma height correlated positively with corolla-tube length in the long-styled morph (r = 0.843), but not in the short-styled morph (r = −0.018). Flower-morph-specific correlation suggests that natural selection by pollinators has moulded trait covariance among floral traits. Because morph-specific correlations are expressed as the patterns of within-morph variation among multiple traits, putative genes responsible for the stigma-corolla tube correlation should not link to the supergene for sex-organ reciprocity between the morphs, but their expression is limited in the long-styled morph.