Scientia Agricultura Sinica ›› 2005, Vol. 38 ›› Issue (04): 671-676 .

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES • Previous Articles     Next Articles

Combining Ability and Heterotic Grouping of CIMMYT Subtropical Quality Protein Maize Lines

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  1. 作物所
  • Received:2003-06-26 Revised:2004-07-22 Online:2005-04-10 Published:2005-04-10

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Abstract: Combining ability and heterotic groups of 22 CIMMYT subtropical quality protein maize (QPM) inbred lines were analyzed based on the data of design II, in which the CIMMYT QPM lines were crossed with 3 QPM testers Qi205, CA375 and CA339 used successfully in China. Field experiments were conducted in two years. The results indicated that a high general combining ability (GCA) of inbred lines CML181, CML182, CML194, CML179 and CML193 was observed and these inbred lines will be used in QPM breeding efforts in China. Inbred lines from populations Pool32, UWO417, WOMTA, CYO and Pool33 were classified into the same heterotic group QA as CA375 and CA339 due to the minor genetic distance among them, while inbred lines from populations Pool34 and UYO showed closer genetic distance with Qi205, and were clustered into the heterotic group QB.

Key words: High quality protein maize, Inbred lines, Combining ability, Heterotic groups

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