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Heterotic groups and exploitation of heterosis--methodology, strategy, and use in hybrid maize breeding in China

By: Zhang, Z | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico) | Proceedings of the Asian Regional Maize Workshop Bangkok (Thailand) 5-8 Aug 2002.
Contributor(s): Li, M [coaut.] | Li, X [coaut.] | Peng, Z [coaut.] | Srinivasan, G.|Zaidi, P.H.|Prasanna, B.M.|Gonzalez, F.|Lesnick, K [eds.] | Yuan, L [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 2004Description: p. 64-72.ISBN: 970-648-116-8.Subject(s): China | Crop yield | Food crops | Genetic markers AGROVOC | Heterotis | Maize | Methods | Molecular genetics | CIMMYT | Hybrids AGROVOC | Plant breeding AGROVOCSummary: Based on dialle I and design II analyses, besides application of molecular markers (RFLP, SSR and RAPD), most of the predominant inbred lines used in Chinese maize breeding program can be clustered into three heterotic groups or six sub-groups. The first group is of domestic germplasm named as Dom, and consists of Sipingtou and Luda Red Cob sub-groups. The second group is of Reid germplasm and consists of BSSS and PA sub-groups. The third group is of Lancaster (Lan) or non-Reid germplasm. The predominant heterotic patterns can be summarized as Dom x Lan or Dom x Reid. Luda Red Cob x Lan is the predominant pattern in spring maize area in north China. Sipingtou x Lan is early maturing, and is mainly used in the northeast provinces and north part of summer maize area. Sipingtou x PA is usually used in the summer maize area. Heterotic pattern used in the southern provinces has not been established. Maize breeders in China tend to produce combinations between local germplasm and exotics. All the patterns currently can be summarized as Local x Exotics, and the patterns are usually of dent x flint type.Collection: CIMMYT Publications Collection
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Based on dialle I and design II analyses, besides application of molecular markers (RFLP, SSR and RAPD), most of the predominant inbred lines used in Chinese maize breeding program can be clustered into three heterotic groups or six sub-groups. The first group is of domestic germplasm named as Dom, and consists of Sipingtou and Luda Red Cob sub-groups. The second group is of Reid germplasm and consists of BSSS and PA sub-groups. The third group is of Lancaster (Lan) or non-Reid germplasm. The predominant heterotic patterns can be summarized as Dom x Lan or Dom x Reid. Luda Red Cob x Lan is the predominant pattern in spring maize area in north China. Sipingtou x Lan is early maturing, and is mainly used in the northeast provinces and north part of summer maize area. Sipingtou x PA is usually used in the summer maize area. Heterotic pattern used in the southern provinces has not been established. Maize breeders in China tend to produce combinations between local germplasm and exotics. All the patterns currently can be summarized as Local x Exotics, and the patterns are usually of dent x flint type.

English

0501|AGRIS 0501|AL-Maize Program

Juan Carlos Mendieta

CIMMYT Publications Collection

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