Estimados colegas:

Aqui la continuacion de la primera parte.

Expected Outputs

Using a blend of conventional and molecular approaches, it is expected that

GILB will accomplish several important objectives within the three years of

its first phase. One major output will be to expand the genetic base for

multigenic durable resistance of cultivated potatoes through the transfer of

resistance genes from wild species, primitive cultivars, and, to a lesser

extent, other organisms. This work will broaden and strengthen late blight

resistance. Rapid progress is expected because CIP and national program

scientists have already overcome most incompatibility barriers between wild

species and cultivated potatoes.

During this initial phase (years 1-3), molecular marker technology will also

be refined to accelerate selection and transfer of durable genetic

resistance to varieties with good agronomic characteristics. In addition,

the importance of genotype by environmental interactions in the expression

of late blight resistance will be assessed. This is one of the most

important subjects in late blight research and it has strong implications

for resistance breeding.

During years 4 through 6 (phase II), the initiative will promote the

transfer of broader-based horizontal resistance into locally adapted potato

varieties and advanced breeding lines. These efforts will be complemented by

research aimed at improving integrated control measures. It is expected that

resistant populations developed through a blend of conventional and

molecular marker-assisted breeding and limited chromosome transfer will also

be achieved during this period. Additionally, genetic maps developed during

phase I will be used to locate resistance genes within the potato genome,

and cloned genes will be transferred through genetic engineering to locally

adapted potato varieties and advanced breeding materials.

During the third and final phase (years 7-10), emphasis will be given to

promoting the control of late blight through integrated disease management

systems in which resistant varieties play the pivotal role.

Interaction with Other International Efforts

The GILB should grow into a global late blight network to facilitate

communication among interested persons, thus complementing existing

mechanisms. GILB will stimulate, integrate, and coordinate R&D on late

blight. It will develop common interests into efforts to seek funding, and

to a lesser extent will complement the funding of ongoing activities and

fund the initiation of others, especially in LDCs. Thus, GILB is compatible

with any other organization with similar interests in late blight. Because

of this, close ties exist and will grow with organizations such as PICTIPAPA

(Programa Internacional Cooperativo del Tizón Tardío de la PAPA or

International Cooperative Program for Potato Late Blight Research) and CEEM

(Cornell-Eastern Europe-Mexico International Collaborative Project in Potato

Late Blight Control).

Illustrative of the interaction under way is the responsibility given to E.

French of CIP by PICTIPAPA to lead its SIFT module, CIP’s Director General

Hubert Zandstra serving on the PICTIPAPA Board of Directors, CIP’s

DDG-Research Peter Gregory being a member of the Panel of Experts of CEEM,

and W. "Bill" Fry’s membership on the steering committee of the GILB.

A Call to Join the GILB

We would like every late blight worker or person interested in late blight

to join the GILB in one or both of the following ways :

1. Join the GILB INFONET, which so far has 232 list members. Send us your

mailing address so we can send you published reports, and your e-mail

address and fax if you have these. You will be kept up-to-date on progress

in GILB and late blight in general. Soon, you will receive indications about

submitting information for posting.

2. Provide a 10-line "statement" on your interests in late blight,

specifying, if you wish, how you consider your institution can participate

in the GILB. So far, we have about 40 of these. Statements from everyone

would provide a "Who’s Who in Late Blight" that we would like to publish

both electronically and on paper so as to reach everyone in the GILB

INFONET.

To reach the GILB INFONET, please send an e-mail to e.french@cgnet.com or a

fax (or letter) to E. French at 51-1/435-1570 (CIP, Apartado 1558, Lima 12,

Peru).

Literature Cited

Berkeley, M.J. 1846. Observations, botanical and physiological, on the

potato murrain. Phytopathological Classics No. 8. American

Phytopathological Society. 1948 reproduction. East Lansing, MI, USA. 108

pp.

Erwin, D.C. and O.K. Ribeiro. 1996. Phytophthora diseases worldwide. APS

Press, Saint Paul, MN, USA. 562 pp.

French, E.R. and G.R. Mackay. 1996. Enhancing the Global Late Blight

Network: Report of the Project Design Meeting on the Global Initiative on

Late Blight. CIP, Lima, Peru. 43 pp.

Fry, W.E., Goodwin, S.B., Dyer, A.T., Matuszak, J.A., Drenth, A., Tooley,

P.W., Sujkowski, L.S., Koh, Y.J., Cohn, B.A., Spielman, L.J., Deahl, K.L.,

Inglis, D.A., and K.P. Sandlan. 1993. Historical and recent migrations of

Phytophthora infestans: Chronology, pathways, and implications. Plant

Disease 77:653-661.

James, Clive W. 1981. Estimated losses of crops from plant pathogens: In:

Pimentel, David (ed.). Handbook of pest management in agriculture. pp.

80-94.

Parris, G.K. 1968. A chronology of plant pathology. Johnson & Sons,

Starkville, Miss., USA. 167 pp.

Walker, T.S. and Crissman, C.C. 1996. Case studies of the economic impact of

CIP-related technologies. International Potato Center (CIP), Lima, Peru. 157

p.

PICTIPAPA Board Meeting held -- August 1996

The "Programa Internacional Cooperativo del Tizón Tardío de la

Papa—PICTIPAPA" (or International Cooperative Program for Potato Late

Blight Research) met in Toluca, Mexico, August 25-27, 1996.

Coordination was established with the Cornell project (CEEM) and

collaboration with CIP, Irish, Netherlands, and U.S. scientists who plan to

work in Toluca.

A symposium "Phytophthora 151" was planned for September 24, 1996, in

Guadalajara, Jalisco State.

Eight-Member Steering Committee for GILB Established

On October 8, 1996, the initial three-member steering committee (SC) met at

Cornell University at the time of the CEEM Planning Meeting (see coverage,

p. 12 ). The meeting was chaired by Bill Fry, and its two other members

(Peter Gregory and George Mackay) participated.

The committee´s principal task was to expand the number of members to make

it represen7tative of the world at large and of less developed as well as

industrialized societies. The full SC will meet in January 1997. Its

membership is as follows:

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Distribuido a traves de la Red Cientifica Peruana http://www.rcp.net.pe

Web de apoyo para uso de Listas RCP: http://www.rcp.net.pe/rcp/LISTAS