Abstract:
Based on the regulation of the population growth types structure deciding their function and the analysis of characters and the evolution trend of the highest stage-IV evolution stage of corn hybrid population growth types evolution process in Hebei-Shandong-Henan summer corn planting zone, this paper expounded following two selecting breeding patterns of dominate corn hybrid population growth types factors composition under certain evolution trend; (1)Rows /ear (x3) + hundred grain weight (x6) + grains/row (x12)+ear width (x16), grain weight/plant (y).Puralistic linear formula is that y=-117.89 + 1.08x3+l.83**x6+2.17**x12+23.24**x16, the correlation coefficient R = 0.543, the determination coefficient R2 = 0.295, (2) Hundred grain weight (x6) + grains/row (x12)+ear width (x16), grain weight/plant (y).Pluralistic linear formula is that y=106.45 + 1.75 **x6 + 2.12 **x12+24.77**x16,the correlation coefficient R = 0.541, the determination coefficient R2 = 0.293.The dominate factor of the evolution characters of population growth types is hundred grain weight.The relation of hundred grain weight and row per ear, ear width, grains per row is subtle.
Key words:
Hebei-Shandong-Henan summer corn planting zone,
Corn hybrid,
Population growth types,
Factors combining and selection breeding patterns
CLC Number:
Zhao Dianxuan, Su Fanghong, Liu Yumei, Bu Fengchi, Wang Zeli, Kang Weimin. Evolution of Corn Hybrid Population Growth Types in Hebei-Shandong-Henan Summer Corn Planting Zone III. Selection Breeding Patterns of Combining of Dominate Corn Hybrid Population Growth Types Factors under Certain Evolution Trend[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1995, 10(S1): 10-14. doi: 10.3321/j.issn:1000-7091.1995.z1.003.