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http://dx.doi.org/10.7740/kjcs.2021.66.3.265

Correlation of Zoysia Grass (Zoysia. spp) Survival, Reproduction, and Floret Appearance Rates to Aid in Development of New Hybrid Zoysia Grass Cultivars  

Han, Gyung Deok (Department of Plant Resources and Environment, Jeju National University)
Jung, Ji Hyeon (Department of Plant Resources and Environment, Jeju National University)
Chung, Yong Suk (Department of Plant Resources and Environment, Jeju National University)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.66, no.3, 2021 , pp. 265-269 More about this Journal
Abstract
This study was conducted to provide primary data through analysis of zoysia grass genetic resources to develop grass cultivars with beneficial novel properties. Zoysia grass (Zoysia. spp) is native to Korea, and is mainly propagated through stolons. However, since seed coat treatment technology was developed, the breeding of sexually reproductive grass variants has become possible, necessitating characterization of the floret appearance rate in the secured zoysia grass genetic resource before developing sexually reproductive cultivars. In this experiment, 549 grass lines were examined, revealing that florets appear in only 43 lines (7.81%). Survival rates after transplantation, and stolon generation rates displayed a significant positive correlation (Rho = 0.44). Survival rates after transfer, and rates of stolon production displayed very low correlations with floret appearance (Rho = -0.11 and Rho = -0.06). No significant results were obtained in 43 lines that displayed >20% floret appearance. To breed sexually reproductive grass variants, it is thus necessary to secure more genetic resources, considering the low rate of floret appearance. Finding traits that predict floret appearance at an early stage is also required.
Keywords
breeding; flower; grass; phenotype; plant physiology;
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