Estimation on Selection Potential and Analysis of Heterosis Model of Maize Synthesized Populations

doi:10.3321/j.issn:1000-7091.2002.01.007

Abstract

Abstract: The North CarolinaII(NC II)mating design was used to evaluate the genetic bases of 36 hybridized combinations in six maize synthesized populations and six inbreds from different germplasm.The results of field data showed that the GCA of plant grain of LBM was the highest, and second is WBM.They are better than BSSSR and BS16 from USA,9 elite heterosis cross models were fo rmed according to SCA of plant grain.The grain value of it from WBMX HZ85 was the highest,and it reached 108.75g. Through the estimation for variance parameters from elite heterosis models.We known that therewere anumberof different value at plant grain character in same cross,it indicated that they contained strong genetic selected potential.The value and distribution rate of plant grain could help breeders select lines.Synthetic maize populations have abundant genetic diversity and belong to different heterosis type respectively. They come from a variety of maize germplasme. They are elite population for choosing inbred line and recurrent selection.

Key words: Maize, Synthesized population, General combining ability, Specific combining ability, Heterosis model, Selection potential

CLC Number:

S513

Tie Shuanggui, Lu Caixia, Ding Yong, Zheng Yonglian. Estimation on Selection Potential and Analysis of Heterosis Model of Maize Synthesized Populations[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2002, 17(1): 30-34. doi: 10.3321/j.issn:1000-7091.2002.01.007.

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