Genetic characteristics of maize (Zea mays L.) with multiple ears and tillers (MET).
1988
Lee H.B. | Choe B.H.
In order to investigate genetic characteristic of maize multiple ears and tillers (MET), a total of 20 inbred lines were crossed with one inbred, IK, which was developed at the Chungnam National University for the multiple ears and tillers per plant. Seven lines from various parts of Korea and five lines from the U.S. The 20 lines crossed were planted on April 10, 1987 under two different plant densities (60cm by 30cm and 60cm by 60cm). The average hybrid vigors estimated for 100 kernel weight, ear length and width were 83.4 %, 38.0 % and 42.3 %, respectively. Regardless of plant densities the hybrid vigor for the number of tillers and ears per plant were estimated comparatively low. Phenotypic and genetic correlations among various plant characteristics were estimated, and they were different depending upon the crosses and plant densities. On the average, the 100 kernel weight and fresh weight showed singificantly positive genetic correlation with grain yield irrespective of plant densities. The heritability in broad sense was estimated and it showed variation depending upon the plant densities. The heritabilities in broad sense of kernel weight per plant, 100 kernel weight and grain yield were estimated higher than other characteristics observed.
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