One of the workshops to be held during the ISHS-ProMusa symposium will discuss the problem banana streak viruses (BSV) pose to the distribution of genebank material. It will pick up on a discussion started by Australian virologist Andrew Geering at the 2007 ISHS-ProMusa symposium. Geering argued that the distribution of germplasm should be guided by the International Plant Protection Convention (IPPC), which states that it is the responsibility of the importing country, not of the exporter (in this case the ITC), to impose phytosanitary measures. In 2008, he reprised his arguments on the old ProMusa website. He was joined by Pierre-Yves Teycheney, a virologist at the French Agricultural Research Centre for International Development CIRAD who argued against relaxing the guidelines. Their arguments are reproduced below.
Bananas have a reputation for being difficult to breed; a reputation that seemed richly deserved when after more than 60 years of trying, breeders had yet to release an improved banana hybrid. No wonder you used to be able to count the number of banana breeding programmes on the fingers of one hand. Nowadays, however, you would not have enough of two hands. According to a survey done for the CGIAR Research Program on Roots, Tubers and Bananas, at least 12 organizations have a banana breeding programme.
Bananas are unusual among major crops in that most of the types grown, either for export or local consumption, are farmer-selected varieties. Less well-known is the role played by islands in safeguarding cultivars that have all but disappeared elsewhere.
Last week, I participated in a discussion on what Fair Trade means for bananas. The meeting was organized by the worker-owned co-operative Equal Exchange and held at the Tufts School of Nutrition in downtown Boston, USA. The event started with a screening of Bananaland, Blood, Bullets and Poison. The movie set the scene and provided plenty of food for thought, even though it’s a bit far-fetched to attribute all the social problems and the violent history of Colombia to the banana industry alone. Nevertheless, it is clear that the banana has a troubled history, and in spite of efforts to address some issues, many remain.
Last December I attended a MusaNet workshop on best practices for Musa germplasm collection and data management held at CIRAD’s field collection on the Caribbean island of Guadeloupe. The traditional group photo hints at the diversity of both the experts looking after the world’s bananas and of the bananas themselves. The setting was perfect for discussing the pièce de résistance of the workshop: the Taxonomic Reference Collection (TRC).
Ten years ago the export banana was given until 2013 before being wiped out by Tropical Race 4 (TR4), the particularly virulent Fusarium strain that has been cutting a swath through Southeast Asia’s commercial plantations of Cavendish bananas. 2013 will not go down in history as the year the iconic banana disappeared from supermarket shelves, but it will be remembered nonetheless; as the year the TR4 fungus was first reported in Africa. The news that TR4 had been confirmed in a Cavendish plantation of northern Mozambique came on the heels of the revelation that the fungus has been in Jordan since 2006. It later transpired that TR4 might also have been in Mozambique for a while, as much as two to three years, according to a news piece in the journal Nature.
The Global Musa Genomics Consortium was created in 2001 to bring together the expertise of specialists applying genomics tools to the banana. For the first ten years, members of the Consortium steadily built genomic resources and worked to get the banana genome sequenced. The long-awaited sequence was about to be released when Dr Yasmina Jaufeerally-Fakim, now the dean of Mauritius University’s Faculty of Agriculture, sent a message to the mailing list. As a member, she thought that the Consortium was “a great initiative for getting all researchers on board and for stimulating exchange of information”. She felt, however, that many of the researchers in the South were not actively participating in or benefiting from what was going on and that the Consortium could do more “to get scientists in the South more involved in Musa genomics and the potential applications for improvement”.
The recent publication by Belgian and Malaysian scientists of a draft Musa balbisiana genome sequence in BMC Genomics went largely unnoticed, at least compared to the media attention that surrounded last year’s publication of the Musa acuminata genome sequence. The media may have a limited appetite for banana genomics but not Musa scientists. They knew from the beginning that the so-called A genome was not the whole story. No sooner had its sequence been released that French and Chinese scientists were discussing joining forces to produce a reference sequence for the edible banana’s other founding genome, the B genome donated by Musa balbisiana, which is often associated with tolerance to abiotic stresses. It looks as if they have been beaten to the finish line, but the fact is that the two scientific teams were pursuing different strategies.