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http://dx.doi.org/10.7740/kjcs.2021.66.2.130

Evaluation of Regional Adaptability in Introduced Super Sweet Corn Hybrids and Heritability of Agronomic Traits  

Lee, Shin-Young (Department of Agronomy, Chungbuk National University)
Kang, Jong-won (Department of Agronomy, Chungbuk National University)
Wang, Seung-hyun (Maize Research Institute, Gangwon-do Agricultural Research and Extension Services)
Park, Tai-choon (Department of Agronomy, Chungbuk National University)
Chung, Jong-Wook (Department of Industrial Plant Science & Technology, Chungbuk National University)
So, Yoon-Sup (Department of Crop Science, Chungbuk National University)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.66, no.2, 2021 , pp. 130-137 More about this Journal
Abstract
This study evaluated newly introduced, commercial super sweet corn hybrids (Zea mays L.) for their potential as breeding materials. Agronomic traits were measured and variance components were obtained using a linear mixed model to estimate the heritability. The trials were carried out in 2018 at two locations (Haenam and Oksan in South Korea). All traits had low heritability, except for mid tasseling and silking days. These traits with low heritability mostly had low genetic variance component estimate. In case of ear height ratio, significant genotype by location appeared to be responsible for low genetic variance, which in turn led to low heritability. Low heritability estimates from the trials with commercial hybrids were perhaps because those hybrids were highly improved for commercial success. Hence, this does not necessarily point to them having poor potential as breeding materials. To overcome low heritability, significant genotype by environment interaction, and achieve high selection efficiency, intermating among hybrids is recommended to create new recombinants before inbred line development.
Keywords
adaptability; agronomic trait; breeding; heritability; super sweet corn;
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