금잔디와 들잔디의 교잡종 한국잔디의 ‘한라그린12’ 품종 개발
Development of ‘Halla Green 12’ Cultivar of Zoysiagrass, a Hybrid of Z. matrella and Z. japonica
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‘Halla Green 12’ cultivar is characterized by Zoysia matrella × Zoysia japonica. It was selected as a warm season zoysiagrass with an extended greening period phenotype at low temperatures and a short plant height. Inflorescences of Z. matrella lines were collected near the boundary between wild Z. matrella lines and wild Z. japonica lines in Ora-dong, Jeju-do. Seeds were collected from the inflorescence and sown to obtain hybrid lines of Z. matrella and Z. japonica, ranging from the Z. japonica line to the Z. matrella line. Among the collected zoysiagrasses, a hybrid line of Z. matrella and Z. japonica, which showed a short height and characteristics of extended greening periods in greenhouses and test fields during winter, was finally selected and named ‘Halla Green 12’. Subsequently, it was registered in June 2022 (Registration No. 277). The test guideline (TG) of the Korea Forest Service was used to analyze the main external morphological characteristics of the ‘Halla Green 12’ cultivar, described as follows. ‘Halla Green 12’ cultivar has a short ‘Plant height’ (6.14±0.37 cm), ‘Leaf blade’ (4.15±0.36 cm), and ‘Leaf sheath’ (1.39±0.08 cm). The ‘Leaf angle’ is very wide at 61.5o. Since the ‘Leaf blade’ of ‘Halla Green 12’ has no ‘Trichomes,’ and the ‘Leaf blade width’ is as narrow as 1.69±0.06 mm, it is morphologically classified as a hybrid line of Z. matrella and Z. japonica, which is close to Z. matrella. In particular, during the winter period, ‘Halla Green 12’, which was grown in the test field, showed an extended greening period with green and reddish-purple leaf colors. The chlorophyll levels of the leaves of ‘Halla Green 12’ cultivar were 2580.2±175.6 nmol/mL/g, which were approximately 13.4-fold higher than those of the control variety ‘Yaji’ and 5.6-fold higher than those of the control Zm-6. ‘Halla Green 12’ showed the characteristics of extended greening period. Since the ‘Halla Green 12’ cultivar is characterized as Z. matrella × Z. japonica, which is close to Z. matrella with short ‘Plant growth’ and characteristics of extended greening periods, it is expected to be useful for reducing management costs, such as those attributed to mowing and industrializing lawn greening (Registration No. 277).
Abstract
‘Halla Green 12’ cultivar is characterized by Zoysia matrella × Zoysia japonica. It was selected as a warm season zoysiagrass with an extended greening period phenotype at low temperatures and a short plant height. Inflorescences of Z. matrella lines were collected near the boundary between wild Z. matrella lines and wild Z. japonica lines in Ora-dong, Jeju-do. Seeds were collected from the inflorescence and sown to obtain hybrid lines of Z. matrella and Z. japonica, ranging from the Z. japonica line to the Z. matrella line. Among the collected zoysiagrasses, a hybrid line of Z. matrella and Z. japonica, which showed a short height and characteristics of extended greening periods in greenhouses and test fields during winter, was finally selected and named ‘Halla Green 12’. Subsequently, it was registered in June 2022 (Registration No. 277). The test guideline (TG) of the Korea Forest Service was used to analyze the main external morphological characteristics of the ‘Halla Green 12’ cultivar, described as follows. ‘Halla Green 12’ cultivar has a short ‘Plant height’ (6.14±0.37 cm), ‘Leaf blade’ (4.15±0.36 cm), and ‘Leaf sheath’ (1.39±0.08 cm). The ‘Leaf angle’ is very wide at 61.5o. Since the ‘Leaf blade’ of ‘Halla Green 12’ has no ‘Trichomes,’ and the ‘Leaf blade width’ is as narrow as 1.69±0.06 mm, it is morphologically classified as a hybrid line of Z. matrella and Z. japonica, which is close to Z. matrella. In particular, during the winter period, ‘Halla Green 12’, which was grown in the test field, showed an extended greening period with green and reddish-purple leaf colors. The chlorophyll levels of the leaves of ‘Halla Green 12’ cultivar were 2580.2±175.6 nmol/mL/g, which were approximately 13.4-fold higher than those of the control variety ‘Yaji’ and 5.6-fold higher than those of the control Zm-6. ‘Halla Green 12’ showed the characteristics of extended greening period. Since the ‘Halla Green 12’ cultivar is characterized as Z. matrella × Z. japonica, which is close to Z. matrella with short ‘Plant growth’ and characteristics of extended greening periods, it is expected to be useful for reducing management costs, such as those attributed to mowing and industrializing lawn greening (Registration No. 277).
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