Analysis of series of variety trials with perennial crops     

H.‐P. Piepho  T. Eckl 《Grass and Forage Science》2014,69(3):431-440

Field trials with perennial crops give rise to repeated measurements taken on the same plot on several occasions. It is important to account for serial correlation among repeated measurements in such trials. This study illustrates the use of mixed models for this purpose. We consider the analysis of trials conducted at several locations and the combination of trials with different starting years. A key issue in the analysis is the distinction between effects of calendar years, which are associated with external environmental variation, and harvest years, which represent internal yield formation processes of the perennial crop. Two methods of two‐stage analysis are compared with single‐stage analysis. It is shown that results of two‐stage analysis are very similar to those of single‐stage analysis, if serial correlation is properly taken into account. Program code for the MIXED procedure of the SAS system is given in an Appendix S1 for all considered cases.  相似文献   

不同前茬作物对星油藤土壤肥力的影响   总被引：1，自引：0，他引：1  

袁启凤  曹淑红  蔡志全  巩合德  樊国盛  王澍 《热带作物学报》2014,35(1):42-46

为探讨不同前茬作物对星油藤土壤肥力的影响,在云南省西双版纳普文镇开展了5种不同前茬作物(茶树-星油藤、水稻-星油藤、香蕉-星油藤、玉米-星油藤、空地-星油藤)对星油藤根际和非根际土壤pH值、土壤电导率、有机质、全氮、全磷、全钾及微量元素的影响研究(以空地-星油藤为对照)。结果表明:不同前茬作物对星油藤根际与非根际土壤pH、电导率与空地土壤pH、电导率均呈显著差异。微量元素全锰、全铁、全锌和全铜的含量低于世界和全国土壤平均水平,重金属元素全锌和全铜单项污染值小于1。以土壤中的有机质、全氮、全磷、全钾的含量综合评价不同前茬作物对星油藤的土壤肥力水平依次为:玉米-星油藤茶树-星油藤香蕉-星油藤水稻-星油藤空地-星油藤。综合考虑,以前茬作物为玉米和茶树的星油藤土壤肥力较好。  相似文献   

Meeting demands for increased cereal production in China   总被引：1，自引：0，他引：1  

Zhonghu He  Xianchun Xia  Shaobing Peng  Thomas Adam Lumpkin 《Journal of Cereal Science》2014

Meeting demands for increased cereal production in China is a great challenge and this paper provides updated information on cereal production and the potential adaptation of cropping systems to climate change, as well as on progress in improving yield potential and developing molecular markers and GM cereals in China. Maize production and soybean imports are increasing significantly to meet the strong demand for feed by a rapidly growing livestock industry. Extension of the rice and maize growing seasons in northeastern China and improvement of the cropping system through delayed wheat planting have contributed to improving cereal productivity despite changing climatic conditions. Significant improvements in yield potential of rice, maize, and wheat have been achieved. Comparative genomics has been successfully used to develop and validate functional markers for processing quality traits in wheat, and also for developing new varieties. Although transgenic Bt rice and maize, and maize expressing phytase have been developed, their commercialization has not been officially permitted. International collaboration has contributed significantly to cereal production by providing germplasm and improved crop management practices. Full integration of applied molecular technologies into conventional breeding programs and promotion of lower-input technologies, will play a key role in increasing and sustaining future cereal production.  相似文献   

基层育种的实践和体会     

徐文武  吕长其 《茶叶》2014,40(4):223-224

本文论述了武义县成功选育出国家级茶树品种的条件,阐述了‘春雨1号’、‘春雨2号’育种的实践过程和经验总结,为基层育种工作提供参考。  相似文献   

国家重要热带作物工程技术研究中心运行机制探讨     

赵子博  王凯丽  李琼 《热带作物学报》2014,(4):51-54

从国家重要热带作物工程技术研究中心现状出发,探讨工程中心的运行机制,提出了加快构建热带农业工程技术研究中心运行机制的对策和建议。  相似文献   

Genome wide Association Analysis on Genes Controlling Panicle Traits of Varieties from International Rice Core Collection Bank and Its Breeding Utilization     

ZUO Shi min  KANG Hou xiang  LI Qian qian  CHEN Zong xiang  ZHANG Ya fang  LIU Wen de  WANG Guo liang  CHEN Hong qi  PAN Xue biao 《中国水稻科学》2014,28(6):649

  相似文献   

花生高油酸育种研究进展   总被引：7，自引：0，他引：7  

迟晓元  陈明娜  潘丽娟  陈娜  王通  王冕  杨珍  禹山林 《花生学报》2014,(4):32-38

花生是我国重要的油料作物、经济作物和出口创汇作物。花生籽粒油脂的品质是由脂肪酸的组成决定的,高油酸的花生油脂稳定性好,有更高的市场价值与营养价值。因此选育高油酸的花生材料和品种已成为目前花生品质改良育种的重要内容。本文综述了高油酸含量性状的遗传规律、高油酸产生的分子机制、杂交育种、突变育种、基因工程育种等方面的研究进展。分析高油酸花生育种中存在的问题,以期为我国花生高油酸育种和种质资源的发掘与利用提供参考。  相似文献   

抗青枯病花生新品种莆花5号的选育     

黄金堂  陈海玲  郑国栋  邱国清  谢志琼 《花生学报》2014,(4):63-66

莆花5号系以湘花B为母本、金花18为父本有性杂交经系谱法选育而成的花生新品种。该品种表现高产、稳产,适应性广,中抗青枯病、叶斑病、锈病,较强的抗旱性、耐涝性和抗倒性。2014年5月通过福建省农作物审定委员会认定,适宜福建省花生产区示范推广。  相似文献   

优质高产抗病水稻新品种七佛占的选育     

何志劲等 《中国稻米》2014,(1):104-105

七佛占是广东省佛山市农业科学研究所选育的感温型中迟熟籼稻新品种,具有米质好、产量高、高抗稻瘟病的特点。该品种于2012年1月通过广东省农作物品种审定,适宜广东省粤北以外稻区作早、晚季种植。  相似文献   

5个优质籼型不育系的选育策略及应用研究     

袁振中  李伊良  杨宏  钟许成  杨盅波  王蔚风  罗晓玲  周小平 《中国稻米》2014,(3):91-94

对常德市1985年至2012年育成的5个籼型优质不育系的选育策略与应用情况进行了分析思考。地方优良品种基因的引入是杂交稻品质改良的关键;三系育种存在对抗性育种未予重视,遗传基础狭窄,常规育种效率低下等问题,提出了三系育种今后努力的方向,即加强生物技术与常规育种技术的结合,适当延长不育系的生育期,对不育系的性状进行形态改良。  相似文献