Reproductive biology of whipgrass (Hemarthria compressa) germplasm in southwest China
Whipgrass (Hemarthria compressa (L. f.) R. Br.) is a stoloniferous, perennial grass, belong to tribe of Andropogoneae, play important roles in husbandry industry and ecological reconstruction in south china, because of its special agronomic characteristics. A major disadvantage of wihpgrass is its low sexual reproductivity. To explore the reason of low fecundity, some reproductive characteristics had been studied. The results showed that pollen -ovule ratio of whipgrass was 87465/1, belong to the reproduction system of obligate xenogamy. Pollen germination rate in vitro was 65. 67% , and the life -span was no more than 3 hours under room temperature and dry condition. Most of pollen grains distributed within the circle of 5 m from the pollen grain originate place. In this area of pollen covered, the plant stands come from the same mother plant, so the cross -pollination in the same plant stand was common. There was significant difference (p＜0. 01) for the plant stigma receptivity between the greenhouse (average temperature was 27℃, average relative humidity was 65%) and the field (average temperature was 25℃, average relative humidity was 75. 9%) condition. The duration of stigma receptivity was 1-5 days and 1-3 days after blooming in the greenhouse and in the field, respectively. The natural fecundity is just 1.17%. No self -pollinated seed was collected.
Chen Lingzhi Yang Chunhua Han Jianguo Zhang wenjun Li Yongxiang
Department of Grassland Science,College of Animal Science and Technology,Sichuan Agricultural Univer Department of Grassland Science,College of Animal Science and Technology,Sichuan Agricultural Univer Institute of Grassland Science,China Agricultural University,Beijing 100193,PR China
国际会议
陕西杨凌
英文
164-168
2010-10-09（万方平台首次上网日期，不代表论文的发表时间）