Comparative study of pollination biology of two closely related alpine Primula species,namely Primula beesiana and P.bulleyana (Primulaceae)  

作　　者：Zhi-Kun WU Chang-Qin ZHANG 

机构地区：[1]Kunming Institute of Botany, Chinese Academy of Sciences, Ktmming 650204, China [2]Graduate School of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Journal of Systematics and Evolution》2010年第2期109-117,共9页植物分类学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (grant no. 30571137);Yunnan Natural Science Foundation (2009) A001;the Support Plan of the National Forest Science and Technology of China (grant no. 2006BAD01A18)

摘　　要：The comparative pollination biology of a population of Primula beesiana, a population ofP bulleyana, and an overlapping population of these two species in Yulong Shan, Yunnan Province, China, was studied in 2004 and 2005. The results indicate that both P beesiana and P bulleyana are typical heterostylous and obligate outcrossing species; the main pollinators of the two species were bees and butterflies. At the sites of all three populations, the main pollinating visitors of the two species showed preference for one of the two species, resulting in the ethological isolation of the two species by the pollinators. This ethological isolation contributes to the reproductive isolation of the two species, which supports the hypothesis that P beesiana and P bulleyana are two distinct species. The reproductive isolation of the two species （ethological isolation） is probably an important mechanism in maintaining species boundaries in the genus and has contributed to the species diversification of Primula in the area. In addition, gene exchanges between P beesiana and P bulleyana has occurred to some extent in the overlapping population, but whether natural hybridization has contributed to species diversification in Primula remains to be determined.The comparative pollination biology of a population of Primula beesiana, a population ofP bulleyana, and an overlapping population of these two species in Yulong Shan, Yunnan Province, China, was studied in 2004 and 2005. The results indicate that both P beesiana and P bulleyana are typical heterostylous and obligate outcrossing species; the main pollinators of the two species were bees and butterflies. At the sites of all three populations, the main pollinating visitors of the two species showed preference for one of the two species, resulting in the ethological isolation of the two species by the pollinators. This ethological isolation contributes to the reproductive isolation of the two species, which supports the hypothesis that P beesiana and P bulleyana are two distinct species. The reproductive isolation of the two species （ethological isolation） is probably an important mechanism in maintaining species boundaries in the genus and has contributed to the species diversification of Primula in the area. In addition, gene exchanges between P beesiana and P bulleyana has occurred to some extent in the overlapping population, but whether natural hybridization has contributed to species diversification in Primula remains to be determined.

关 键 词：pollination biology Primula beesiana Primula bulleyana reproductive isolation. 

分 类 号：S897.3[农业科学—特种经济动物饲养] Q944.43[农业科学—畜牧兽医]