Analysis of Morphological Characteristics for a Core Set of 194 Maize Accessions
2016
Kim, O.G., Kangwon National University, Chuncheon, Republic of Korea | Hong, T.K., Kangwon National University, Chuncheon, Republic of Korea | Ko, W.R., Kangwon National University, Chuncheon, Republic of Korea | Woo, S.Y., Kangwon National University, Chuncheon, Republic of Korea | Ma, S.J., Kangwon National University, Chuncheon, Republic of Korea | Park, J.W., Gangwon-do Agricultural Research and Extension Services, Chuncheon, Republic of Korea | Sa, K.J., Kangwon National University, Chuncheon, Republic of Korea | Lee, J.K., Kangwon National University, Chuncheon, Republic of Korea
In order to develop a core set and new corn variety in Korea, we evaluated the morphological characteristics of 194 maize accessions by examining eight quantitative characteristics. On the evaluation of quantitative traits for 194 maize accessions, they showed the morphological variations in tassel length (35.1±5.0 cm), plant height (226.1±33.7 cm), ear height (86.3±22.6 cm), stem diameter (2.3±0.6 cm), leaf width (9.3±1.1 cm), ear length (14.5±2.4 cm), ear row number (14.1±1.9 row), and 100 kernel weight (24.9±4.4 g). The results of principal component analysis (PCA) indicated that the tassel length, plant height, and ear height greatly contributed to positive direction on the first principal component axis. One-hundred kernel weight contributed to negative direction on the second principal component axis. Thus these morphological characteristics, which contributed greatly in the first and second principal components, might be useful for discrimination among 194 maize accessions. In our study, seven accessions, such as IT026357, IT026441, IT027321, IT033271, IT033591, IT033597 and IT124273, particularly were measured high on yield-related traits. Consequently, the 194 maize accessions used in this study could be used as promising materials for maize breeding programs such as development of new hybrid in Korea.
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