In the last 20 years, China has made considerable achievements in the conservation of crop germplasm resources. A network for crop germplasm conservation has been established by the end of 2002, which includes a natio...In the last 20 years, China has made considerable achievements in the conservation of crop germplasm resources. A network for crop germplasm conservation has been established by the end of 2002, which includes a national long-term seed genebank and its duplicated genebank, 8 national medium-term seed genebanks, 30 national field genebanks. 2 national in vitro genebanks, and 3 in situ conservation sites including 1 for wild soybean and 2 for wild rice. More than 334 000 crop germplasm accessions are currently stored in the national long-term genebank, covering 35 families, 192 genera and 712 species, which rank in the first place in the world. More than 43 000 accessions of vegetatively propagated crops and perennial crops covering more than 900 species are conserved in the national field genebanks. In addition, 2 300 accessions are stored in the national in vitro genebanks. This paper reviewed the latest advances of techniques for safety preservation of stored germplasm in seed genebank, ultra-dried seed storage and in vitro preservation in China and discussed current highlights in germplasm conservation.展开更多
The tender buds of Phyllodoce caerulea were used as explants for this experiment.The most suitable culture media were screened for shoots regeneration directly from bases of the tender buds,rooting and germplasm prese...The tender buds of Phyllodoce caerulea were used as explants for this experiment.The most suitable culture media were screened for shoots regeneration directly from bases of the tender buds,rooting and germplasm preservation in vitro with a uniform design.The results showed that DR+TDZ4.00 mg·L-1was the most suitable for shoots regeneration,and the rate of regeneration was more than 98.5%.MS（modified）+IBA0.05 mg·L-1+NAA0.01 mg·L-1+KT0.10 mg·L-1was the most suitable for rooting,and the rate of rooting was more than 97.8%.N-68+B92.30 mg·L-1+ phloridzin 1.50 mg·L-1was the most suitable for preservation in vitro for 42 months.Stems each with one node were cut from the regenerated shoots and cultured for propagation,and a 35-fold proliferation rate was achieved within 40 days.The method of "deferring growth with dwarfing" was utilized for germplasm preservation in vitro at normal temperature.In vitro culture and germplasm preservation in vitro system of Phyllodoce caerulea had been successfully established.展开更多
基金supported by the National Key Technologies Research and Development Program and the National Basic Work Program,China(2001BA511B01).
文摘In the last 20 years, China has made considerable achievements in the conservation of crop germplasm resources. A network for crop germplasm conservation has been established by the end of 2002, which includes a national long-term seed genebank and its duplicated genebank, 8 national medium-term seed genebanks, 30 national field genebanks. 2 national in vitro genebanks, and 3 in situ conservation sites including 1 for wild soybean and 2 for wild rice. More than 334 000 crop germplasm accessions are currently stored in the national long-term genebank, covering 35 families, 192 genera and 712 species, which rank in the first place in the world. More than 43 000 accessions of vegetatively propagated crops and perennial crops covering more than 900 species are conserved in the national field genebanks. In addition, 2 300 accessions are stored in the national in vitro genebanks. This paper reviewed the latest advances of techniques for safety preservation of stored germplasm in seed genebank, ultra-dried seed storage and in vitro preservation in China and discussed current highlights in germplasm conservation.
文摘The tender buds of Phyllodoce caerulea were used as explants for this experiment.The most suitable culture media were screened for shoots regeneration directly from bases of the tender buds,rooting and germplasm preservation in vitro with a uniform design.The results showed that DR+TDZ4.00 mg·L-1was the most suitable for shoots regeneration,and the rate of regeneration was more than 98.5%.MS（modified）+IBA0.05 mg·L-1+NAA0.01 mg·L-1+KT0.10 mg·L-1was the most suitable for rooting,and the rate of rooting was more than 97.8%.N-68+B92.30 mg·L-1+ phloridzin 1.50 mg·L-1was the most suitable for preservation in vitro for 42 months.Stems each with one node were cut from the regenerated shoots and cultured for propagation,and a 35-fold proliferation rate was achieved within 40 days.The method of "deferring growth with dwarfing" was utilized for germplasm preservation in vitro at normal temperature.In vitro culture and germplasm preservation in vitro system of Phyllodoce caerulea had been successfully established.
