Development of a new maize hybrid for the Ecuadorian lowland

Yellow maize (Zea mays L., var. indurata) is mainly produced in the Ecuadorian lowlands (less than 1,200 m a. s.l.), primarily for feed production. Although Ecuador has recently increased maize production, new genotypes are needed for self-sufficiency and in order to avoid costly imports. Maize is sown mostly from December to January during the rainy season. However, the irregularity of rainfall has become a constraint on production. “INIAP H-603 Superior” is a new single – cross maize hybrid developed for the Ecuadorian lowlands with improved yields, which could contribute to domestic food security. The new hybrid had an average yield of 8.48 t ha-1 with outstanding performance under the reinfall, sustained moisture, and irrigation condition, outperforming the commercial hybrids INIAP H-602, DEKALB-7088 and INIAP H-553. Additionally, the new hybrid showed tolerance to the principal foliar diseases: leaf blight (Exserohilum trucicum), rust (Pucciana sorghi), and leaf blight (Curvularia lunata), as well as good adaptability and stability, with a regression coefficient (bi) of 0.98 when it was evaluated in 29 locations from 2010 to 2013. The greatest yield potential of the new hybrid (10.82 t ha-1) was obtained with irrigation during the dry season.

Bibliographic Details

Main Authors:	Limongi Andrade, Ricardo, Alarcón Cobeña, Francisco, Zambrano Zambrano, Eddie Elí, Caicedo Villafuerte, Marlon Brainer, Villavicencio Linzán, Jean Paúl, Eguez Moreno, José, Navarrete Cedeño, José Bernardo, Yánez G., Carlos, Zambrano Mendoza, José Luis
Format:	Journal articles biblioteca
Language:	English
Published:	2018
Subjects:	FITOMEJORAMIENTO, SEGURIDAD ALIMENTARIA, CAMBIO CLIMÁTICO,
Online Access:	http://repositorio.iniap.gob.ec/handle/41000/5318
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