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《Acta Prataculturae Sinica》 2017-01
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Studies of the floral organ characteristics and sexual breeding system of Fritillaria unibracteata

CHEN Yuan;XU Bo-Qiong;GUO Feng-Xia;BAI Gang;ZHANG Jin-Feng;ZHANG Yong;Gansu Key Laboratory of Crop Genetic & Germplasm Enhancement,Gansu Provincial Key Laboratory of Good Agricultural Production for Traditional Chinese Medicine,Gansu Provincial Engineering Research Centre for Medical Plant Cultivation and Breeding,College of Agronomy,College of Life Sciences and Technology,Gansu Agricultural University;Gansu Engineering Laboratory of Resource Reservation and Utilization for Characteristic Medical Plants,Gansu Cultivated Engineering and Technology Research Center of Standardization and Traceability for Characteristic Chinese Medicine,Gansu Tasly Zhongtian Pharmaceutical Co.,Ltd;Key Laboratory of Hexi Corridor Resources Utilization of Gansu,Hexi University;  
To determine the flower characteristics and sexual breeding system for Fritillaria unibracteata,a combination of field tests and microscopy examination was used to study the flower conformation and pollination biology in order to provide scientific information to assist in plant breeding.This species has a single bisexual flower borne at the stem apex.Occasionally there are two flowers when cultivated for three years frombulbs.The immature bud is green and then turns a darker purple covered with light yellow flecks.The flowering period is from May to June but single flowers bloom only 6-8days.The bell-shaped flower has six perianth segments in two whorls and six apopetalous stamens within,five of which are tightly circumfused to the pistil and the other independent.The epigynous ovary has three short splits on its hairy chapiter which are secretory.The ovary stands higher than the stamens in the young bud,but becomes shorter in mature,open flowers.The pollen quantity,and vigor is maximal on the first day of flowering and pollen is produced for three days.The pistil stigma in a 1.5cm long green bud was already receptive.Anther dehiscence coincided with the peak in stigma receptivity but stigma receptivity lasted longer(over 6days)than pollen production.The flower has over 6000 pollen grains and 160 ovules in single flower,resulting in a pollen to ovule(P/O)ratio of 37.5.The out crossing index(OCI)was 4according to the flower size and behavior.Pollinators included wind and a few wasps,bees,spiders and other miscellaneous insects.Our results suggest that this species should possess a sexual breeding system with partial self-compatibility,heterogamy,and required pollinators.
【Fund】: 国家自然科学地区基金(31360316和31660158);; 甘肃省农牧厅中药材产业科技攻关项目(GYC12-06);; 甘肃省财政厅农业科技示范推广项目(2130106-技术推广类);; 校企合作和教学研究项目资助
【CateGory Index】: S567.231
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3 LIU Fangyan;WANG Xiaoqing;CHEN Min;ZHANG Zhixiang;LIAO Shengxi;LI Kun;Research Institute of Resources Insects,Chinese Academy of Forestry;College of Life Science,Southwest Forestry University;College of Biological Sciences and Biotechnology,Beijing Forestry University;;Flowering phenology and breeding system of Terminalia franchetii( Combretaceae)in the dry-hot valley of the Jinsha River,China[J];生态学报;2015-21
4 Niu Yajie;Yuan Jinfeng;Chen Hongxian;Dong Qianqian;Fan Yali;Wang Xiaofeng;Liu Zhonghua;College of Biological Science and Biotechnology, Beijing Forestry University;;Germination Characteristic and Endogenous ABA, IAA Content Change with HPLC in the Seed of Hedysarum laeve Maxim During Stratifying, Shelling[J];中国农学通报;2015-04
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8 SUN Ying;WANG A-xiang;CHEN Shi-hui;MA Cui-qing;YANG Li-li;HE Miao;College of Landscape and Architecture,Northeast Forestry University;Forestry Station of Liujiahe Town People's Government;;Research on pollen viability and stigma receptivity of Adonis amurensis[J];草业科学;2014-06
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