广西药用野生稻资源调查收集与保护建议

广西药用野生稻原生地破坏十分严重。二十世纪七十年代普查时在58个公社分布有药用野生稻，2002-2009年重新调查时，仅在43个乡镇发现分布有药用野生稻，比二十世纪七十年代减少25.9%。为确保广西药用野生稻资源的安全，共抢救性收集了170个居群、2142份药用野生稻资源，有效地保存了广西药用野生稻种质资源遗传多样性和完整性。同时，在调查中还发现药用野生稻原生地新的分布点15个以及植株高达5.2m、茎秆高位分蘖有3-4个分枝和半卷叶药用野生稻等特殊种质资源。根据调查结果和对广西药用野生稻濒危状况及其根源的分析，本文对未来药用野生稻的保护提出了建议。

Collection and conservtion of Oryza officinalis Wall in Guangxi based on field surveys

Natice areas of Oryza officinalis Wall in Guangxi wer damaged seriously.During the first round field survey in 1970',Oryza officinalis were found in 58 communes in Guangxi.However,when we carried out the second round survey in 2002-2009,it was only found in 43 townships.Compared with 1970'distribution of Oryza officinalis,the number of native areas has decreased by 25.9%.To conserve resources of Oryza officinalis wall safely,2142 accessions from 170 populations have been collected based on scientific sampling methods.At the same time,15 new native areas and some special germplasm resourses such as high plant height(5.2m),tilling from high nodes with 3-4 branches and half-curved leaves were found during the field surcey.result showed that genetic diversity of Oryza officinalis Wall in Guangxi was very abundant.Based on the field survey and analyses on the threats and root causes for Oryza officinalis,the authors provide