The research on corn heterosis plays an
important role in improving yield and quality of corn. The researchers measured
kernel-related traits of 89 temperate inbred lines, 59 tropical/subtropical
inbred lines and 179 F1 hybrid assembled from the 148 inbred lines. All inbred
lines were planted, harvested and cross-pollinated in Hainan in 2013. They
analyzed the diversity and difference of grain traits between temperate and
tropic/subtropical inbred lines and different F1 hybrid types with a division
based on the origin of parents.
The results show that the grain length and
hundred-grain weight of temperate inbred lines are longer and heavier than
those of tropic/subtropical. In F1 hybrid, kernel length of temperate inbred
lines shows longer than that of tropic/subtropical. The heterosis analysis
shows that the F1 hybrids have relative better-parent heterosis and relative
mid-parent heterosis in grain thickness and grain weigh than grain length and
kernel width.
*News from a paper titled Differential
Analysis of Kernel Traits for Maize Inbred Lines and Hybrids from Different
Sources delivered by researchers Li Yanan, Aye Nyein Chan, Feng Yuran, Dong
Yuan, Shi Yaqin, Wang Boxin, Xu Shutu and Xue Jiquan from College of Agronomy
of Northwest A&F University.
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