首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   5篇
  免费   0篇
林业   1篇
农学   1篇
综合类   2篇
园艺   1篇
  2016年   1篇
  2013年   1篇
  2007年   1篇
  2000年   1篇
  1994年   1篇
排序方式: 共有5条查询结果,搜索用时 15 毫秒
1
1.
Over the past decade, M‐type cytoplasmic male sterility (CMS) line W931A and a variety of restorer lines have been exploited for the release of hybrid seeds in soybean (Glycine max). However, the identities of restorer genes in the nuclei of soybean restorer lines are still unclear. In this study, we analysed the inheritance pattern of restorer locus Rf‐m from restorer line WR016 and constructed a high‐resolution map of this locus. Results showed that Rf‐m in WR016 is a monogenic dominant gene located within a 162.4‐kb region on chromosome 16, which is flanked on each side by new developed simple sequence repeat (SSR) markers GmSSR1602 and GmSSR1610 at a distance of 0.11 and 0.25 cM, respectively. Nineteen open reading frames (ORFs) were predicted in this region. Of these, seven genes arranged in tandem on chromosome 16 encode pentatricopeptide repeat (PPR) proteins, which is similar to other reported restorer loci in plants. These results lay a solid foundation for map‐based cloning of the Rf‐m gene and will be helpful for marker‐assisted selection of elite CMS restorer lines.  相似文献   
2.
Lignins are cell wall phenolic heteropolymers that result from the oxidative coupling of three monolignols bearing p-coumaryl (H), coniferyl (G), and sinapyl (S) units, in a reaction mediated by peroxidases. Here, we report the existence of a relationship between the Σβ-O-4/ΣO-4 end monomer ratio of the linear lignin fraction, released through the specific cleavage of the alkyl ether linkages by thioacidolysis, and the G/S ratio of lignins, when this was estimated in differentially evolved vascular land plants. Most importantly, in the case of angiosperms, Gnetales, and lycopods, the Σβ-O-4/ΣO-4 end monomer ratio was apparently predictable from the proportions at which the G and S units were mixed. In the case of G lignins (present in basal gymnosperms and ferns), the Σβ-O-4/ΣO-4 end monomer ratio decayed exponentially to increase the O-4-linked dihydroconiferyl alcohol (DHCA) content. The results obtained suggest that the Σβ-O-4/ΣO-4 end monomer ratio of the linear lignin fraction depends intimately on the lignin monomer composition, and, therefore, on the chemical nature of the radicals derived from three monolignols (coniferyl, dihydroconiferyl, and sinapyl alcohols), whose gain have been finely tuned during land plant evolution.  相似文献   
3.
广两优931是广东省农科院水稻研究所用自育两系不育系广3S与自选的抗稻瘟病恢复系GR931组配育成的两系杂交稻新组合,该组合经过广东省两年区试和1年生产试验,表现产量与对照优优122相当,米质达国标和省标优质3级,中抗稻瘟病,感白叶枯病,耐寒性中强,2012年1月通过广东省品种审定,适宜广东省粤北稻作区和中北稻作区晚造、中北稻作区早造种植。  相似文献   
4.
烟草野火病药剂防治研究   总被引:9,自引:4,他引:5  
经过二年的室内药剂筛选、田间小区试验和生产基点试验,选出了药效优于链霉素和DT的药剂细菌清931,平均防效在77.5%-92.99%,为烟草野火病的防治提供了一种新药剂。  相似文献   
5.
番茄新品种扬粉931的选育   总被引:1,自引:0,他引:1  
扬粉 931的母本是由美国品种OregonSpring和从北京引进的早霞杂交后代经多代单株选择出的优良株系 88 6 5 9 4,父本是从美国引进的PGY90 91多代自交后代与江苏的矮黄粉杂交后定向选育的优良株系 88 1 1 1 2 1。该一代杂种适于保护地早熟栽培 ,抗TMV ,中抗CMV。植株为有限生长类型 ,低温下单性结实 ,果实粉红色 ,可溶性固形物 4 .5%以上 ,品质优良。早熟高产 ,每6 6 7m2 产量 4 0 0 0kg左右 ,已在江苏地区推广种植 2 0 0hm2 。  相似文献   
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号