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Progress in productivity through mass selection breeding program

By: Wondimu, A | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): Abdurehman, J [coaut.] | CIMMYT.
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Addis Ababa (Ethiopia) CIMMYT|EARO : 1999Description: p. 50-52.ISBN: 92-9146-065-6.Subject(s): Breeding methods | Crop yield | Ethiopia | Maize | Mass selection | CIMMYT | Zea mays AGROVOC | Genotypes AGROVOC | Hybrids AGROVOC | Plant breeding AGROVOCDDC classification: 633.15 Summary: A mass selection-breeding program was undertaken from 1991-1995 to improve the performance of an open-pollinated maize variety, A511 for better grain yield and uniformity. A511 was developed by ear to row selection from Kenyan hybrid H511 in early 1970's. It, had a broad genetic base. However, due to its long stay (more than 2 decades) under production, it had deteriorated both in terms of yield performance and uniformity. The selection program was carried out for five consecutive generations. The five cycles of selection were evaluated along with Co and other standard hybrids for two years (1996 and 1997) and at three locations. There were highly significant differences for grain yield between treatments, years and locations within years. However, no interaction was observed among the treatments over environments. Nevertheless, variety X location interaction was highly significant, suggesting the need for considering different varieties for different locations. The highest mean grain yield over environments (year X location) was recorded for BH-540 followed by BH-140 and A511 C, with 5.13,4.92, and 4.86 tons per hectare respectively. Highest mean grain yield among the cycles was recorded for A511 C5 and A511 C4 with the respective yield of 4.86 and 4.63 tons per hectare. These varieties have a 27.9% and 21.8% yield advantage over Co over environments. When the grain yield advantage was compared at Awasa alone where these cycles best expressed their yield potential, the advantage was as much as 35% and 26.8% for C5 and C4 respectively. Plant and ear heights also showed highly significant differences among genotypes. The tallest entry was BH-140 with 184 cm for plant and 93 cm for ear height.Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 633.15 EAS No. 6 (Browse shelf) 1 Available J649283
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A mass selection-breeding program was undertaken from 1991-1995 to improve the performance of an open-pollinated maize variety, A511 for better grain yield and uniformity. A511 was developed by ear to row selection from Kenyan hybrid H511 in early 1970's. It, had a broad genetic base. However, due to its long stay (more than 2 decades) under production, it had deteriorated both in terms of yield performance and uniformity. The selection program was carried out for five consecutive generations. The five cycles of selection were evaluated along with Co and other standard hybrids for two years (1996 and 1997) and at three locations. There were highly significant differences for grain yield between treatments, years and locations within years. However, no interaction was observed among the treatments over environments. Nevertheless, variety X location interaction was highly significant, suggesting the need for considering different varieties for different locations. The highest mean grain yield over environments (year X location) was recorded for BH-540 followed by BH-140 and A511 C, with 5.13,4.92, and 4.86 tons per hectare respectively. Highest mean grain yield among the cycles was recorded for A511 C5 and A511 C4 with the respective yield of 4.86 and 4.63 tons per hectare. These varieties have a 27.9% and 21.8% yield advantage over Co over environments. When the grain yield advantage was compared at Awasa alone where these cycles best expressed their yield potential, the advantage was as much as 35% and 26.8% for C5 and C4 respectively. Plant and ear heights also showed highly significant differences among genotypes. The tallest entry was BH-140 with 184 cm for plant and 93 cm for ear height.

English

0103|AL-Maize Program|AGRIS 0102|AJ

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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org