野生稻DNA导入水稻后代的抗病性遗传规律研究

通过花粉管通道法将野生稻DNA导入水稻,已从受体宁粳16号、宁粳23号的转化后代中选育出可稳定遗传的变异株系。主要特征为:(1)品质较对照表现突出,产量高,综合性状好;(2)在D1、D2、D3代进行跟踪接种鉴定抗病性,筛选到稳定遗传的抗病变异株系。由此可见,野生稻DNA导入水稻后会发生广泛变异,外源DNA片段通过重组,可整合到受体基因组。

野生稻DNA导入水稻栽培品种获得变异种质的农艺性状及抗病性初步分析

利用花粉管通道导入技术将普通野生稻(AA染色体组)DNA导入宁夏水稻栽培品种宁粳23号、宁粳16号中,获得163个变异后代,变异性状极其广泛,对其中22份材料在全生育期经苗期、成株期抗病性鉴定,表现广谱抗性的材料有4份,其中2005 D 3-136、2005 D 3-60无论在农艺性状还是在抗病性上变异都优于受体。

野生稻DNA导入栽培品种获得变异后代的抗病性分析

利用花粉管通道导入技术将普通野生稻(AA染色体组)DNA导入宁夏水稻栽培品种宁粳23号、宁粳16号中,获得163个变异后代,变异性状极其广泛,对其中22份材料在全生育期经苗期、成株期抗病性鉴定,表现广谱抗性材料有4份,其中2005D3-136,2005D3-60无论在农艺性状还是在抗病性上变异都优于受体。

经野生稻总DNA处理的栽培稻离体胚长成植株后的某些性状变化(简报)

栽培稻离体胚（幼胚、萌动胚）以野生稻总ＤＮＡ浸泡或滴加处理后，经组织培养长成的完整植株进行盆栽的结果显示，当代与后代植株中大多数无变异，仅１株产生芒，２株抗稻瘟病。有芒种子再次种植于人工气候室内，其Ｄ_１、Ｄ_２和Ｄ_３代种子仍有芒；抗稻瘟病植株的种子收获后再次播种，后代仍有抗稻瘟病特性。

Preparation of DNA from Silica Gel Dried Mini_amount of Leaves of Oryza rufipogon for RAPD Study and Total DNA Bank Construction

Gene resources of Oryza rufipogon Griff. play a crucial role in rice breeding, and hence to study their conservation is of utter importance. The authors describe a method for preparation of DNA from mini_amount of the silica_gel_dried leaves of Oryza rufipogon . The high molecular weight DNAs of 1?168 individuals representing 44 populations have been obtained with high yields, which could be used for RAPD PCR and construction of total DNA bank of this species. The template DNA from silica_gel_dried leaves stored for one year at room temperature gave the same RAPD results as that from the newly prepared silica_gel_dried leaves. The optional template DNA concentrations for amplification ranged from 3.1 ng to 50 ng. In addition, the quality and quantity of the template DNAs that affect RAPD results are also discussed.