Proceedings of the Korean Society of Crop Science Conference (한국작물학회:학술대회논문집)
- 2017.06a
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- Pages.79-79
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- 2017
Combining ability and heterosis of Korean sorghum varieties
- Choe, Myeongeun (Department of Southern Area Crop Science, NICS, RDA) ;
- Ko, Jeeyeon (Department of Southern Area Crop Science, NICS, RDA) ;
- Song, Seokbo (Department of Southern Area Crop Science, NICS, RDA) ;
- Park, Changhwan (Department of Southern Area Crop Science, NICS, RDA) ;
- Kwak, Doyeon (Department of Southern Area Crop Science, NICS, RDA)
- Published : 2017.06.04
Abstract
Grain Sorghum varieties grown in Korea have low productivity and are constrained by the fact that farmers' choice of improved varieties is limited. Hybrid cultivars have been demonstrated to be more productive and food security than pure line varieties. However, There's no available hybrid cultivars and never planted before in Korea. This study was, therefore, conducted to determine combining ability of Korean landrace varieties and cultivar, the level of heterosis of experimental hybrids depending on environments. Two cytoplasmic male-sterile lines were crossed with six male-fertile lines in accordance with North Carolina II mating scheme to generate 12 experimental hybrids. The hybrids were evaluated in replicated row-column alpha designs at two sites in Texas and South Korea under on-season production conditions. For each trait, general combining ability (GCA) and specific combining ability (SCA) effects were estimated using the line-tester method of analysis. Results indicated significant differences among genotypes for both grain yield potential and secondary traits. Hybrids were predominant for grain yield, and displayed up to 127% heterosis of A03017