Abstract
In October 1992 the first three late blight resistant varieties developed under local conditions were officially released in Cameroon. This resulted from the first four years of research collaboration between the Institute of Agricultural Research (IRA) of Cameroon and the International Potato Center (CIP). The three varieties were selected from a group of 95 advanced clones sent by CIP in early 1988. The new varieties are well adapted to the highlands of the country, where late blight is the main pathological constraint on potato production. CIPIRA (CIP 381381.13) is a variety with white skin, as compared to TUBIRA (CIP 381406.6) and BAMIRA (CIP 720055) which have a red skin. These varieties have shown a consistent late blight reaction between 1–3 (scale of l=immune to 9=highly susceptible) during the four years of field trial evaluations, a growing cycle of 90–125 days at elevations between 1,000-2,000 m, and an average potential yield of 30–40 ton/ha under low fertilizer inputs (60/60/40 kg NPK/ha). Seed will be available for distribution to farmers in late 1994, utilizing a basic seed production scheme based on mass production of rooted stem cuttings developed by the IRA/CIP Project in Cameroon.
Compendio
En Octubre de 1992 las tres primeras variedades resistentes a tizon tardio, desarrolladas bajo condiciones locales, fueron oficialmente lanzadas en Camerun. Esto ha sido como resultado de los primeros cuatro anos de colaboracion entre el Instituto de Investigaciones Agricolas de Camerun (IRA) y el centro Internacional de la Papa (CIP). Las tres variedades fueron selecionadas inicialmente de un grupo de 95 clones avanzados enviados por el CIP a Camerun en 1988. Estas variedades estan bien adaptadas a las zonas montanosas del pais, donde el tizon tardio es la principal enfermedad que reduce los rendimientos. CIPIRA (CIP 381381.13) es una variedad de piel blanca, en comparacion a TUBIRA (CIP 381406.6) y BAMIRA (CIP 720055) que son variedades de piel roja. Estas variedades han mostrado una resistencia al tizon tardio entre 1–3 (en una escala de l=inmune a 9=muy susceptible) durante los cuatro anos de ensayos de campo, un ciclo vegetativo entre 90–125 dias a elevaciones entre 1,000-2,000 m y un rendimiento potencial entre 30–40 t/ha bajo condiciones de minima fertilizacion 60/ 60/40 kg/ha of NPK. Semilla mejorada para distribuir a los agricultures de Camerun estara disponible a fines de 1994, gracias a un sistema de production en masa de esquejes enraizados bajo condiciones controladas desarrollado por el Projecto IRA/CIP.
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Former CIP Regional Representative for West Africa.
Former CIP Research Associated in West Africa.
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Martin, C., Demo, P., Njualem, D. et al. Late blight resistant varieties for Cameroon. American Potato Journal 72, 513–522 (1995). https://doi.org/10.1007/BF02849254
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DOI: https://doi.org/10.1007/BF02849254