• Journal of The Korean Society of Grassland and Forage Science
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• v.35 no.4
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• pp.297-302
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• 2015

This experiment was conducted to evaluate the agronomic characteristics and forage production of Italian ryegrass cultivars at three locations (Gurae, Sungju and Cheonan) from 2013 to 2014. The experiment employed a randomized complete block design with three replications. The seven cultivars used in this experiment were 'Korwinearly', 'Florida80', 'YounbongI', 'YounbongII', 'YounbongIII', 'KeimyungI' and 'KeimyungII' varieties. Italian ryegrass varieties were seeded on October 4 at Gurae, October 8 at Seongju and October 3 at Cheonan in 2013. The Italian ryegrass varieties were harvested on April 26 at Gurae and Seongju, and on April 24 at Cheonan in 2014. Although the seven cultivars had resistance to foliar diseases and insects and high winter survival, they has little lodging resistance. The heading dates for 'Younbong I', 'Younbong II' and 'Keimyung I' were earlier than for other varieties at the three locations. Dry matter (DM) content and plant height in the early maturing cultivars were higher than in other cultivars at the three locations. The fresh and DM yields of the early maturing cultivars were also higher than others at the three locations. The results of this experiment indicate that the heading date for early maturing cultivars is earlier, and the plant height is higher than for other cultivars. Early maturing cultivars had higher DM content as well as fresh and DM yields of Italian ryegrass. Therefore, early maturing cultivars should be recommended as high-yield forage in double-cropping systems because of their superior production of forage and early heading date.

• Journal of The Korean Society of Grassland and Forage Science
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• v.32 no.3
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• pp.293-300
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• 2012

This experiment was carried out to compare the agronomic characteristics, forage yield and quality of sorghum ${\times}$ sudangrass hybrid at two locations (Sungju and Cheonan) in 2009. The experiment was a randomized complete block design with three replications. The eight recommended hybrids used in this experiment were 'Sordan 79', 'SX17', 'Honey chew', 'Honey grazer', 'G7', 'Jumbo', 'Green star' and 'GT56' hybrids. The heading of four hybrids were headed at both region, Sungju and Cheonan. There are no big differences in general agronomic characteristics among hybrids, but brix scale of heading and BMR (brown mid rib) types were higher than those of other hybrids. Dry matter (DM) and plant height of heading type hybrids were higher than those of headless types. The fresh, DM and TDN (total digestible nutrients) yields of heading type hybrids were also higher than those of headless types, and BMR types were lower than others. The crude protein and crude ash contents of headless hybrids were higher than those of heading hybrids, while its non-fiber carbohydrate (NFC) content showed the opposite results. The acid detergent fiber (ADF) and NFC contents of BMR types were lower than others. The results of this experiment indicates that heading hybrids were more higher than headless hybrids in the agronomics and forage yield of sorghum ${\times}$ sudangrass. However heading types were lower headless types in quality of sorghum ${\times}$ sudangrass. And BMR hybrids were also high quality of sorghum ${\times}$ sudangrass hybrid because of higher brix content and lower ADF content among tested hybrids.

• Journal of Sericultural and Entomological Science
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• v.49 no.2
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• pp.60-66
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• 2007

This study was carried out to develop the utilization of mulberry resources conserved by Jeollabuk-Do Agricultural Research & Extension Services. Mulberry accessions were tested for agronomic characteristics and antioxidant capacity according to varieties. From that result, three suitable varieties such as 'Sinilppong', 'Suwonsang 2' and 'Ilbongeum' were selected for the production of mulberry leaves. They have strong agronomic characteristics like size, yield and resistance against damages by blight and harmful insects. Whereas, 'Gumunyoung' showed the lowest freezing resistance. In the antioxidant capacity analysis of mulberry leaves, autumn's mulberry leaves showed higher antioxidant capacity (ascorbic acid equivalent) than that of spring's it. According to collection time, antioxidant capacity were 2,109.8 nmol (August), 2,617.8 nmol (September) and 3,311.5 nmol (October), respectively.

• Weed & Turfgrass Science
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• v.2 no.2
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• pp.159-163
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• 2013

The purpose of this study is to observe the growth habit and investigate a possibility of cultivating the GM rice (CaMsrB2-8) as a rice cultivar having drought resistance. Germination viability test showed that there was no significant difference between the drought-resistant GM(CaMsrB2-8) and non-GM (Ilmi) rice which was the parent variety at the GM rice. All the seeds of CaMsrB2-8 and Ilmi germinated after 6 days. Viviparous germination was not found in CaMsrB2-8 and Ilmi that was grown in greenhouse at $23{\pm}2^{\circ}C$ with water spraying for 40 days. Ratooning of CaMsrB2-8 and Ilmi was observed in 7-14 days and found uniform in field condition. CaMsrB2-8 seemed to grow faster than Ilmi. But CaMsrB2-8 and Ilmi were similar in 14-21 days. Both CaMsrB2-8 and Ilmi showed low seed shattering and more than 90% grains were ripened. All the seeds scattered in the paddy soil surface were not germinated after passing the winter. This study suggests that the drought-resistant GM rice was not significantly different with the parent variety of Ilmi in many agronomic characteristics such as wildness traits.

• Korean Journal of Medicinal Crop Science
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• v.28 no.1
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• pp.47-55
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• 2020

Background: Curcuma longa L., a perennial crop originating from tropical and subtropical region, including India, is noted for its important medicinal properties. However, C. longa plants are unable to endure the winter season in Korea, and its rhizomes were invariably succumb to fungal infection when stored in polyvinyl bags. In this study, we accordingly sought to develop a C. longa variety capable of producing high rhizome yields and to identify stable conditions under which rhizomes can be stored in Korea. Methods and Results: We evaluated the agronomic characteristics of nine C. longa germplasms and examined the effects of storing rhizomes at different temperatures (4℃ to 24℃) in paper bags or plastic baskets. We found that the finger rhizomes was higher in CUR02, CUR03, and CUR06 germplasms than those of other groups. Furthermore, in terms of yield per 1 ㎡, the weights of the finger rhizomes and tuberous roots were significantly higher in CUR09 (3.4 ㎏/㎡) and CUR04 (678.7 g/㎡) than those of other groups. Therefore, we consider that these C. longa germplasms might be useful as breeding material. Although the fresh weights of the rhizomes were slightly reduced when stored in paper bags and a plastic baskets at 10℃ to 15℃, there was no evidence of fungal decomposition or sprouting, which is observed when using a conventional storage method. Conclusions: The results of this study indicate that the selected C. longa germplasms can provide a useful source of breeding material for the development of high yielding varieties and that a temperature ranging from 10℃ to 15℃ and the use of paper bags or plastic baskets provide stable post-harvest storage conditions for C. longa rhizomes.

• Journal of the Korean Society of Tobacco Science
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• v.17 no.1
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• pp.27-32
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• 1995

A new flue-cured tobacco mutant line BU 8832-85 was developed at Taegu Experiment Station, Korea Ginseng and Tobacco Research Institute in 1994. KF 8832-85 was resulted from a cross of flue-cured cultivars NC 95$\times$NC 2326, and developed by a pedigree system of breeding ; initial selection was made by plant type and resistance to bacterial wilt(BW) disease(heudomonas solanaceamm) in the F2 generation under the natural field conditions infested with the pathogen. One white flowered plant was occurred by spontaneous mutation in a certain line among the F3 generatioin while the others were pink. Six plants from the seeds by selfing were selected at the field infested with the pathogen among 240 populations with white flowering in the F4, KF 8832-85 was selected based on yield and leaf quality trials among 6 lines in Fs generation. BCF 8832-85 was compared with its Parent for certain agronomic and chemical characteristics at Taegu Experiment Station in 1993 and 1994. The results showed that KF 8832-85 have white flower, the stalk height was approximately that of NC 2326 but averaged about loom taller than NC 95. It produced ground suckers as much as NC 95, and did not breakdown leaf at the same as WC 2326. KF 8832-85 have high resistance to bacterial wilt disease. Yield of KF 8832-85 was 10 and 18% higher then that of NC 2326 and WC 95, respectively. Price per Kg was equal to that of NC 2326. The contents of nicotine and reducing sugar did not differ significantly from NC 95, while total nitrogen was significantly lower than NC 95. Therefore, the new mutant line is genetically stable for agronomic and chemical characteristics and provides a source of bacterial wilt disease resistance for use in breeding resistant flue-cured cultivars. Key words : Mutant line, White flower, Spontaneous mutation.

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.10a
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• pp.288-288
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• 2022

Rice is an important staple in the world. And drought is one of the important constraints that negatively affect yield loss and grain quality of rice. CRISPR/Cas9 is a new breeding strategy that can improve the characteristics of rice quickly and accurately. CRISPR/Cas9 is a novel approach that can reliably harvest rice yields in response to a rapidly changing climate. In addition, there is no externally inserted DNA left in genome-editing rice, and it is receiving attention as being able to take responsibility for future food because its characteristics are continuously improved. In the future, high levels of drought resistant in water-constrained environments will be required, which will reduce yield loss. OsSAP was genome-editing with CRISPR/Cas9 in rice. A different line number was assigned to each panicle, and the generation advanced by applying the ear-to-row method. Genome-editing rice has improved drought resistance in drought conditions. Also, in genome-editing rice, the target sequence was homozygous in the 0 generation, and the coefficient of variation of heading date, number of tiller, and 1,000-grain weight was very small in 2 generation. In the era of rapidly changing climate change, CRISPR/Cas9 presents a new breeding strategy that can rapidly and accurately improve agronomic traits of major food crops as well as rice. CRISPR/Cas9 is applied together with traditional breeding to develop into a new breeding strategy, it is suggested that food can be obtained stably in response to climate change.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.37 no.4
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• pp.355-360
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• 1992

The experiment was carried out to study the influence of planting densities and fertilizer application levels on some agronomic characters and yield of flower-head in Zingiber mioga ROSC. The results obtained are summarized as follows ; Plant hight was long in dense planting, and short in spacious planting. Stem diameter was thick in spacious planting, and was thin in dense planting. Flower-head weight per plant was decreased in dense planting and was increased in spacious planting. Yield was higher in dense planting densities (10$\times$20 : 50plants /m$^2$, 20$\times$20 : 25plant /m$^2$). Fertilizing (N : P$_2$O$_{5}$ : $K_2$O=15 : 15 : 15kg /10a) was increased than without fertilizing because plant height and number of stem was good.d.

• Journal of The Korean Society of Grassland and Forage Science
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• v.16 no.1
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• pp.9-16
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• 1996

'This experiment was canied out to investigate the effects of endophyte status(end0phyte-free and -infect) and cutting frequency(3, 4, 5 and 6 timeslyear) on the agronomic characteristics, DM yield and weed development of tall fescue(Festuca arundinacea Schreb.) at the Experimental Field of Grassland and Forage Crops Division, National Livestock Research Institute, Suweon, from 1993 to 1994. 'Ihe results obtained are summarized as follows: DM yield of endophyte-infected tall fescue was slightly higher than that of endophyte-free tall fescue. DM yield of two tall fescue varieties was significantly decreased with frequent culting(p<0.05). Weed development of pasture tended to be decreased with endophyte-infected tall fescue and infrequent cutting, and endophyte-infected tall fescue had a good adaptation to the poor environment. Based on the results of this experiment, it is suggested that a slight increase in forage yield could be obtained from endophyte-infected tall fescue and endophyte-infected tall fescue was more persistant than endophyte-free tall fescue under poor conditions.

• Journal of The Korean Society of Grassland and Forage Science
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• v.17 no.4
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• pp.323-328
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• 1997

Com(Zea mays L.) hybrid is recognized as the principal cmp in a double-cmpping system. Rye(Secale cereale L.), seeded after corn hybrid harvest, is the second crop in the system. Under this forage production system, corn planting is mostly delayed beyond mid-May due to delayed rye harvest on May, but the corn should be harvested until mid-August before the autumn rain started. It is for this reason that early maturing corn hybrids are preferred for silage crops in this system. Twenty eight cultivars of early maturing corn hybrids evaluated in this experiment at three locations (Suweon, Sunghwan and Cheju) for 3 yr(1994-1996) were compared for agronomic characteristics, forage yield and quality. Among the com hybrids tested, DUO1 and GL499 were recommended as the government superior corn hybrids due to their promising agronomic traits, such as short plant and ear heights, adquate dry matter percentage for silage on mid-August, good staygreen along with good lodging and disease resistance, better ear retention, similar yield compared to the control hybrid, Suweon 19 and above average stover quality.