Horizontal transmission and host-virulence attenuation of totivirus in violet root rot fungus Helicobasidium mompa     

Kouichi Suzaki  Ken-ichi Ikeda  Atsuko Sasaki  Satoko Kanematsu  Naoyuki Matsumoto  Kouji Yoshida 《Journal of General Plant Pathology》2005,71(3):161-168

Monokaryotic strains of Helicobasidium mompa were used as vectors of a mycovirus between various H. mompa isolates to examine the transmissibility of one of the mycoviruses, totivirus (HmTV1–17 virus) in the hypovirulent isolate V17 of H. mompa. The isolates that acquired HmTV1–17 virus were also examined for any alteration in the virulence. Twelve dikaryotic isolates of H. mompa, belonging to 11 mycelial compatibility groups (MCGs) and being mycelially incompatible with isolate V17, were used as recipients of HmTV1–17 virus. Two monokaryotic isolates that were mycelially incompatible with isolate V17 and all of the recipients were also used as vectors of HmTV1-17 virus between isolate V17 and the recipients. When isolate V17 and recipients were directly paired on plate media, HmTV1-17 virus was transmitted from isolate V17 into 2 of the 12 recipients (i.e., 2 of the 11 MCGs). Two monokaryotic strains were paired with isolate V17, and the monokaryotic strains that acquired HmTV1-17 virus were then used as new virus donors. When the monokaryotic strains containing HmTV1-17 virus were paired with the 12 recipients, HmTV1-17 virus was transmitted into 7 of the 12 recipients from the monokaryotic strains (i.e., 7 of 11 MCGs). Based on these results, we concluded that monokaryotic strains could act as vectors to transmit HmTV1-17 virus into H. mompa isolates. When four of the H. mompa isolates that acquired HmTV1-17 virus were used to inoculate apple rootstock Malus prunifolia, the virulence of all of the isolates was attenuated from that of their parental isolates. Moreover, because the DNA fingerprints of the fungal isolates that acquired HmTV1-17 virus were the same as those of their parental isolates, the infection with HmTV1-17 virus is considered the cause of virulence attenuation of H. mompa.  相似文献   

真姬菇SIEF3136菌株单核体RAPD多态性分析     

许占伍  陈辉  冯志勇  陈明杰  鲍大鹏  汪虹 《安徽农业科学》2010,38(6):2820-2823

[目的]探讨真姬菇单核体间RAPD标记多态性,为育种材料的选择提供一定的分子水平依据。[方法]以真姬菇（Hypsizygus marmoreus）工厂化栽培白色菌株SIEF3136的原生质体单核体和不同孢子单核体为材料,进行RAPD分析。[结果]筛选到38条多态性引物,共扩增341条条带,其中253条表现多态性,多态率为74.2%。31个菌株的相似系数为0.34～0.90。除单核体S18-16,同一交配型的单核体间的相似系数都在0.60以上,表现出较高的相似性。在大约0.61的相似水平上,所有菌株分为2组。PM-01与T1、T3聚为第1大类,PM-02与T2、T4聚为第2大类。另外,在不到0.62的水平上S18-16聚为第3大类,显示出极大的差异,这很可能是该单核发生突变所致。[结论]真姬菇子实体上担子在减数分裂中染色体交换很高,RAPD标记可以用于真姬菇单核多态性研究,并可为交配型鉴定提供参考。  相似文献   

利用单单杂交技术选育粤北香菇1号     

柯野  曾松荣  方白玉  蔡爱群  郑秋桦 《江西农业学报》2009,21(1)

利用原生质体单核化技术得到野生香菇菌株单核菌丝体,再从栽培香菇菌株的子实体中分离担孢子得到单核菌丝体。将这两种单核亲本进行杂交,通过镜鉴和拮抗作用选育出新菌株粤北香菇1号,并且对香菇粤北1号的部分生物学特性进行了研究。  相似文献   

单核和同核原生质体技术在食用菌遗传育种上的应用   总被引：10，自引：2，他引：10  

潘迎捷  伯海英 《食用菌学报》1994,1(2):56-62

单核和同核原生质体是食用菌原生质体技术中的一个重要研究内容,由于单核和同核原生质体是没有经过减数分裂形成的无性后代,为食用菌遗传和育种研究提供了一个重要的材料。本文阐述了食用菌单核和同核原生质体的发现和作用以及在食用菌遗传研究上的应用前景。  相似文献