CE:1817 CF: cag034172145
Proposal and reclassification of standards for resistance studies of brown rust sugarcane
Propuesta y reclasificación de patrones para estudios de resistencia de caña de azúcar a roya parda
Joaquín Montalván Delgado, Isabel Alfonso Terry, Eida Rodríguez Lema, Ivia Pouza Sierra, Isabel Torrez Varela y Yoslén Fernández Gálvez
Instituto Nacional de Investigaciones de la Caña de Azúcar (INICA). Carretera al Central Manuel Martínez Prieto, Km 2½, Edificio IPRoYAZ, Boyeros, Ciudad de La Habana, Cuba, CP19390
In Cuba, the methodology used for sugarcane brown rust resistance evaluation has limited patterning, which makes it difficult to adequately handle cultivars in the intermediate categories of reaction, provided that from an agro-productive point of view they are interest. Six known reaction patterns and 11 commercial cultivars were studied. The variables, length, amount and percentage of leaf area occupied by pustules were recorded, as well as the length of the major pustule. The application and interpretation of statistical methods allowed to ratify as highly resistant PR980, resistant Ja64-11 and as susceptible My5514. The cultivars SP70-1284 (moderately resistant), C88-380 (moderately susceptible) and C323-68 (susceptible) are included as new standards. They are reclassified to C334-64 (moderately susceptible), Ja60-5 and B4362 (highly susceptible).