STUDIES ON THE REPRODUCTIVE-BIOLOGY OF WHITE YAM (DIOSCOREA-ROTUNDATA POIR)
STUDIES ON THE REPRODUCTIVE-BIOLOGY OF WHITE YAM (DIOSCOREA-ROTUNDATA POIR)
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DOI：
10.1007/bf00046049
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发表时间：
1992-01-01
期刊：
影响因子：
1.9
通讯作者：
HAHN, SK
中科院分区：
文献类型：
--
作者：
SEGNOU;FATOKUN, CA;HAHN, SK
对山药自然传粉者的鉴定、分布、白色山药的开花规律及杂交等进行了研究。在尼日利亚伊巴丹的国际热带农业研究所（IITA）进行了研究，目的是为山药遗传改良所需的杂交种子的生产提供信息。（48.0%），双翅目（20.4%），Hyattera（20.0%），半翅目（5.8%），缨翅目（5.8%）被捕获周围山药植物和推测是传粉者：它们进入开放的可接受的花朵，在山药植株上的出现与开花期的持续时间一致。开花模式的研究显示：（i）雄性和雌性无性系在它们的开花起始期以及开花持续时间方面不同; ㈡如果交错种植，种子生产和传统育种方法是可行的，通过对白色山药和白色山药与黄山药（D. cayenensisLam）是成功的，但结果相对较低（最大31.8%）。这种方法比自然授粉（19.2%）更有效，因此可以补充它的杂交种子的生产引入遗传变异的山药育种群体。
Investigations were conducted on the identification and distribution of yam natural pollinators, flowering pattern and hybridization of white yam (Dioscorea rotundata Poir.) at the International Institute of Tropical Agriculture (IITA), lbadan, Nigeria, in order to provide informations for producing hybrid seeds needed for yam genetic improvement.Insects belonging to the Coleoptera (48.0%), Diptera (20.4%), Hymenoptera (20.0%), Hemiptera (5.8%), and Thysanoptera (5.8%) were caught around yam plants and presumed to be pollinators: they entered open-receptive-flowers and their presence on yam plants coincided with the duration of the flowering period.Studies on the flowering pattern revealed that: (i) Male and female clones differed in their periods of flower initiation as well as the flowering duration; (ii) Seed production and conventional breeding methods are feasible if staggered planting, water and soil fertility could be managed to ensure that flowering periods of males and females nick and also extend flowering.Artificial pollinations within white yam and between white yam and yellow yam (D. cayenensis Lam) using the camel hair brush method were successful, but resulted in a relatively low fruit set (31.8% maximum). This method was more effective than natural pollination (19.2%) and can thus supplement it for the production of hybrid seeds for introducing genetic variation in yam breeding populations.