• 생물환경조절학회지
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• 제21권4호
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• pp.385-391
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• 2012

국내에서 육성된 딸기 품종인 '매향' 및 '설향'을 대상으로 비가림 포트 육묘 시 런너의 절단 시기에 따른 자묘의 생육과 정식 후 수량을 2작기(2009년 및 2010년)에 걸쳐 검토하였다. 자묘는 정식일(2009년 9월 11일 및 2010년 9월 10일)을 기준으로 30일, 20일, 10일 및 5일 전에 모주로부터 런너를 절단하였다. 런너의 절단 시기가 늦을수록 모주에서 양수분이 육묘 후기까지 자묘로 공급되어 지상부 생체중, 관부직경 및 엽록소 함량은 증가하는 경향을 보였다. 반면에 근중 등 지하부 생육은 런너의 절단 시기가 빨라서 모주로부터 자묘의 독립 기간이 길수록 증가하였다. 모주에서 런너를 절단한 경우의 관수 요구량이 런너를 절단하지 않은 처리구에 비하여 29.7% 증가하였다. 또한, 런너를 절단하였을 경우에 런너를 통하여 탄저병이 침입한 경우가 런너를 절단하지 않은 처리구에 비하여 37.6% 높게 나타났다. 정식 후 정화방의 출뢰 및 개화 개시기는 런너 절단 시기가 늦을 경우 2~3일까지 지연되었으나 런너 절단 시기에 따른 조기 수량의 차이가 없으므로 런너 절단 시기를 정식일의 5~10일 전인 8월 하순 이후로 늦추어 실시하는 것이 탄저병 발생 경감 측면에서는 유리한 것으로 생각된다.

• 생물환경조절학회지
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• 제30권4호
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• pp.257-262
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• 2021

유인 방법은 딸기 묘를 생산하는 전통적인 방법이다. 그러나 딸기 묘를 유인하여 번식하는 방법은 오랜 노동시간이 있어야 하는 노동 집약적인 방법이다. 삽목 방법은 상대적으로 유인 방법에 비해 노동 기간과 작업 시간이 짧으므로 유인의 효과적인 대안으로 주목되어왔다. 이 연구는 유인과 삽목 사이의 노동 기간, 작업 시간 및 묘의 생육을 조사하기 위해 수행되었다. '매향' 딸기는 두 개 동의 딸기 육묘용 유인 온실과 삽목 온실에서 각각 재배되었다. 유인 방법(유인 작업, 모주 제거, 자묘 간 분리) 및 삽목 방법(삽수 채묘, 저장 전 처리, 삽목 작업)에 대한 주요 작업 시간을 측정했으며, 유인은 158일 동안 6개의 작업이 필요하며, 삽목은 113일 동안 4개의 작업이 필요했다. 유인은 삽목보다 작업 시간이 더 많이 필요했다. 유인과 삽목묘 육묘 방법에 따른 유의적인 차이가 없었다. 이러한 결과는 묘소질의 손실 없이 육묘 동안 유인 방법보다 삽목 방법이 더 많은 노동 기간과 작업 시간을 절약할 수 있음을 의미한다.

• 생물환경조절학회지
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• 제31권2호
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• pp.98-103
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• 2022

엽면적의 비파괴적 추정은 잎 절단에 의한 방법에 비해 간단하고 시간을 절약하므로 다양한 원예 작물에 대한 잎 면적 예측 모델이 개발되었습니다. 그러나 딸기 잎 면적 추정에 대한 연구는 제한적이다. 본 연구는 국내산 딸기 5품종('아리향', '죽향', '금실', '매향', '설향')의 3복엽의 잎길이와 폭을 이용한 비선형회귀분석을 통해 잎면적을 예측하기 위해 수행되었다. 실제 잎 면적과 전개식을 통해 추정된 잎 면적의 관계에 대한 결정계수(R²)는 0.923에서 0.973까지 다양하였다. R² 값이 0.96 이상인 '죽향', '설향' 및 '매향' 3 품종의 잎면적은 본 연구에서 개발한 모델을 사용하여 비파괴적으로 예측할 수 있습니다. 반면 묘의 상태가 좋지 못하고 과한 생장을 했던 '아리향'과 '금실'은 각각 0.938, 0.923으로 약간 낮은 R² 값을 보였다. 본 연구에서 개발한 품종별 잎 면적 추정 모델을 Python으로 코딩하여 본 논문에 첨부하였다. 개발된 추정 모델은 많은 딸기 관련 연구에 광범위하게 사용될 수 있습니다.

• The Plant Pathology Journal
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• 제22권3호
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• pp.222-229
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• 2006

Twenty-two isolates of Fusarium oxysporum f. sp. fragariae were obtained from diseased strawberry plants and their characteristics were investigated by vegetative compatibility group (VCG), random amplified polymorphic DNA (RAPD), and pathogenicity. Three major VCGs (A, B, and C) and one incompatible group were identified by nitrate reductase complementation test. The virulence pattern of the 22 isolates was studied in relation to four cultivars including Dochiodome, Red-pearl, Maehyang and Akihime. RAPD markers were used to determine genetic relationship, and created three major clusters among the 22 isolates of F. oxysporum f. sp. fragariae. Isolates belong to VCG-C were strongly pathogenic, and relatively high correlation was existed among VCG and RAPD, and virulence. In addition, VCG and RAPD pattern between pathogenic and non-pathogenic isolates were distinctly different.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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• pp.118-118
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• 2003

The occurrence of Fusarium wilt in strawberry fields in Korea was assessed from 2001 to 2003. Fusarium wilt was found from June to August in nursery beds, from September to October after planting in production beds, and from January to March during harvest. The symptoms seen were root rots, discolored vascular tissue in the crown and deformation and yellowing of central leaflets. The disease occurred in up to 30％ of plants in 37 of 214 fields surveyed. Fusarium of sporum Schlecht. ex Fr. f. sp. fragariae was frequently isolated from cvs. Dochiodome, Maehyang, Redpearl, Samaberry and Akihime. Factors affecting the occurrence of Fusarium wilt were investigated; infested soils had high salt concentrations, low pH, OM, average P2O5 and exchangeable. Fusarium wilt was more frequent following conventional basal fertilization than after non-nitrogen basal fertilization and more frequent following the use of NH4-N than after NO3-N.

• Plant Biotechnology Reports
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• 제3권1호
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• pp.87-93
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• 2009

To determine whether pattern recognition based on metabolite fingerprinting for whole cell extracts can be used to discriminate cultivars metabolically, leaves and fruits of five commercial strawberry cultivars were subjected to Fourier transform infrared (FT-IR) spectroscopy. FT-IR spectral data from leaves were analyzed by principal component analysis (PCA) and Fisher's linear discriminant function analysis. The dendrogram based on hierarchical clustering analysis of these spectral data separated the five commercial cultivars into two major groups with originality. The first group consisted of Korean cultivars including 'Maehyang', 'Seolhyang', and 'Gumhyang', whereas in the second group, 'Ryukbo' clustered with 'Janghee', both Japanese cultivars. The results from analysis of fruits were the same as of leaves. We therefore conclude that the hierarchical dendrogram based on PCA of FT-IR data from leaves represents the most probable chemotaxonomical relationship between cultivars, enabling discrimination of cultivars in a rapid and simple manner.

• The Plant Pathology Journal
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• 제21권3호
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• pp.270-274
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• 2005

The aim of this study was to determine the effect of milk as one of the environmental friendly materials that substitute chemical fungicides for control powdery mildew (Sphaerotheca aphanis) of strawberries $(Fragaria{\times}ananassa\;Duch.)$. 'Maehyang' and 'Akihime' varieties planted in greenhouses were evaluated for the control of powdery mildew. Applications of $5\%,\;10\%\;and\;20\%$ milk had much better effects on controlling powdery mildew. In particular, $10\%$ milk showed a higher efficacy than other concentrations applied onto straw­berry in greenhouse experiments. Foliar spray application of $10\%$ milk was effective for powdery mildew, whereas drench application was not. Also, foliar spray of $10\%$ milk was able to accelerate more firmness and calcium contents of strawberry fruits than the non-treated. The $10\%$ milk applied with fertilizer salts $(Ca(H_2PO_4)_2-H_2O\;and KH_2PO_4)$ showed there was a similar efficacy to $10\%$ milk alone in greenhouse experiments. White crystals and cracks on strawberry fruits appeared by $20\%$ milk. This result indicated that $10\%$ milk was a useful substitute for fungicides to control powdery mildew of strawberry.

• Journal of Plant Biotechnology
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• 제44권2호
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• pp.178-190
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• 2017

$Fragaria{\times}ananassa$, a strawberry evolved from hybridization between F. virginiana and F. chiloensis, is a globally cultivated and consumed fruit crop valued for its flavor and nutritional value. Flavor and quality of fruits are determined by factors such as sugars and organic acids present during fruit development. These characteristics are highly subjective in different genotypes and affected by various environmental factors. In this study, we analyzed contents of major sugar compounds including fructose, glucose and sucrose by HPLC analysis in four cultivars namely, Maehyang, Seolhyang, Festival and Sweet Charlie. We identified 55 genes related to fructose, glucose, sucrose and soluble sugar regulation whose expression were analyzed in four cultivars at three developmental stages of the fruit namely, green, white and ripened stages. Expression of these genes across these progressive fruit developmental stages varied among cultivars. Among the 55 genes, genes FaFru3, FaSuc11 and FaGlu8 revealed differential patterns of expression along developmental stages of the fruit in high and low sugar-containing genotypes, respectively and may be putative candidates for sugar content in strawberries. Expression of genes are discussed with regard to corresponding sugar content in these genotypes. Further analysis and application of these genes may be valuable in developing high sugar containing cultivars via marker-assisted breeding.

• 농업과학연구
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• 제41권1호
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• pp.9-16
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• 2014

This experiment was conducted to examine the effects of a short-term treatment of high pressure $CO_2$ on shelf-life of strawberry fruit. A short-term treatment (12 hr) of 100% $CO_2$ resulted in the increase of fruit firmness up to 71.9% compared to that at harvest. The firmness of $CO_2$ treated fruit remained a significantly higher than that of control (air) up to 15 days. The alteration of pectic polymers was observed by $CO_2$ treatment such as an increase of EDTA soluble pectins and decrease of water soluble ones. The $CO_2$ treatment resulted in the increase of total amount of wall bound calcium. Pectate lyase activity, an important agent of strawberry fruit softening, was also significantly reduced by $CO_2$ treatment. Contents of soluble solids and acids of $CO_2$ treated fruit were higher than those of control fruit. Short-term treatment of high pressure $CO_2$ affected shelf-life through firmness increase whereas the visual quality and decay incidence of strawberry fruit were not affected.

• 식물병연구
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• 제15권1호
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• pp.8-12
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• 2009

Virus disease surveys of strawberries cultivated and preserved as germplasm resources in Korea was conducted during 2007-2008. Virus detection was conducted by RT-PCR using total RNAs extracted from strawberry samples. We detected the infection with Strawberry mild yellow edge virus (SMYEV), Strawberry mottle virus (SMoV), Strawberry vein banding virus (SVBV) and Strawberry pallidosis associated virus (SPaV) while no infection with Strawberry crinkle virus (SCV), Strawberry necrotic shock virus (SNSV), Strawberry latent ring spot virus (SLRSV) and Arabis mosaic virus (ArMV) was observed. The infection rate of virus disease on 4 cultivars including Seolhyang, Maehyang, Gumhyang, and Dahong, bred in Korea, was 0.1, 1.9, 0, and 0%, respectively. Surprisingly, however, cultivar Red Peal introduced from Japan in 1997 revealed 48.3% virus infection rate. SMYEV, SMoV and SPaV were also identified in strawberries growing in the farm fields of Korea. In the field, however, SMYEV was the most predominant virus (97.4%) among those 3 identified viruses. SVBV was detected only in strawberry kept as a germplasm.