Scientia Agricultura Sinica ›› 2007, Vol. 40 ›› Issue (8): 1594-1601 .doi: 10.3864/j.issn.0578-1752.at-2006-7781

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

Breeding Potential Analysis of Six Genetic Synthetic Maize Populatiuons

  

  1. 四川农业大学玉米研究所/教育部作物基因资源与遗传改良重点实验室
  • Received:2006-07-04 Revised:2006-08-23 Online:2007-08-10 Published:2007-08-10

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Abstract: Abstract: 【objective】 To provide reasonable improvement programs, we estimated Systematically breeding potential of six genetic recombination maize populations. 【Method】We carried out phenotype analysis, combining ability and SSR marker analysis in this research.【Result】Field results of the six synthetic populations observed in two seasons showed that variances were significant in the observed most traits. Analysis of the GCA showed that most agronomic and economic traits were significant variances among the six populations. The SCA of a few economic traits were significant variances. A total of 246 alleles were detected with 26 pairs of SSR primers in the six populations. Based on number of polymorphic loci , ratio of polymorphic loci and heterozygosity of alleles, all populations except P1 had relative abundant recombinations, and relative rich diversities within populations. Genetic distance analysis implied that the variance between populations were larger than that within a population. 【Conclusion】It is concluded synthetically that populations of P4,P2 and P7 have higher genetic variation, and the GCA of major economic traits were better than P1,P3 and P5, and have better utilization value in maize breeding programs.

Key words: maize population, combining ability, SSR marker

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