Biodiv Sci ›› 2000, Vol. 08 ›› Issue (2): 198-207.
• 论文 •
FAN Shu-Guo,ZHANG Zai-Jun,LIU Lin,LIU Hong-Xian,LIANG Cheng-Ye
Three species of wild rice , i.e. ,Oryza rufipogon , Oryza of ficinalis and Oryza meyeriana , were
found in China , and had been listed as the national second-grade protected plants ( gradually endangered
species) of China. It was investigated that Chinese wild rice have been in imminent danger due to rapid loss of
their natural community. Oryza rufipogon is in most imminent danger , while Oryza officinalis and Oryza
meyeriana are less imminent . The main cause is economic activities which led to the loss of habitat , continuous
deterioration of habitat quality , sustained reduction of habitat and invasion of exotic species. At present , some
measures have been taken to protect Chinese wild rice , such as in situ conservation (on-site maintenance) and
ex situ conservation (off-site maintenance) . Ex situ conservation includes seed-preserved genebank ,whole
plant-preserved field genebank and callus-conserved cryopreservation. Chinese wild rice species possess many
excellent characteristics , such as extreme cold-tolerance , high resistance to diseases and pests , good quality and
high content of protein , senescence-tolerance of functional leaves , strong regenerating capability , good quality
of lush growth , good growing dominance , which have been widely used in conventional rice breeding and hybrid rice breeding , and huge social and economic benefits have been achieved. Rapid progress has been made in
biotechnology of Chinese wild rice , especially in anther culture , protoplast culture , somatic cell hybridization
and gene transfer. It can be expected that Chinese wild rice resources will play more and more important role
in rice breeding.
FAN Shu-Guo, ZHANG Zai-Jun, LIU Lin, LIU Hong-Xian, LIANG Cheng-Ye. Conservation of wild rice genetic resources in China and their utilization in breeding[J]. Biodiv Sci, 2000, 08(2): 198-207.
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