This study identified single nucleotide polymorphisms (SNPs) that affect the body weight of chickens. Analysis of body weight showed that the Cornish breed had the highest body weight, and the Korean native chicken (Gray Brown) had the lowest body weight. TSH is composed of an α-subunit and a β-subunit, and the TSH-β gene encoding the β-subunit has been reported to be associated with obesity. In chickens, it is located on chromosome 26 and is reported to be associated with growth. The calcium-sensing receptor gene (CaSR) plays a role in the regulation of extracellular calcium homeostasis and is responsible for calcium absorption in the urinary tract, which affects the eggshell quality in poultry. It was shown that TSH-β was strongly correlated with weight in Cornish and Korean native (Gray Brown) chickens, particularly in those with the CC trait. However, CaSR showed no association with body weight in poultry; it was associated with calcium and the eggshell. Thus, selection for TSH-β can be used to produce individuals with more favorable traits in terms of body weight.

In this study, microstructural characteristics and constituent elements of fiberglass splint and cast are examined using a scanning electron microscope and an energy dispersive X-ray spectrometer. As observed by the scanning electron microscope, fiberglass splint and cast had a porous structure with many bundles of fiberglass textures well assembled. Spaces between bundles of the fiberglass splint are triangular or elliptical shaped and the long-axis diameter is measured at about 1 mm. The thickness of fiber bundles covered with plaster is measured at 600 μm and the diameter of a single strand of fiberglass is up to 10 μm. The thickness of the fiberglass bundle of the fiberglass splint is measured at about 700 μm. Spaces between bundles are formed in the shape of triangles with gentle edges and long-axis diameter of up to 1.4 mm, which is larger than that of the splint. The thickness of a single strand of fiberglass of the plaster-coated cast is 11.5 μm, which is thicker than that of fiberglass of the splint. As a result of analyzing constituent elements of the fiberglass cast and the splint with an energy dispersive X-ray spectrometer, Ca, Si, and Al components are identically detected. This result shows that the fiberglass cast has a smoother surface with hardened plaster than the fiberglass splint. The thickness of the fiberglass bundle and the thickness of a single strand of the fiberglass are also larger than those of the fiberglass splint.

페로몬에 기반한 해충방제 기술은 페로몬이 동정되는 곤충의 수가 지수적으로 증가함에 따라 더욱 성공가능성이 높은 전략이 되고 있다. 이 연구는 애기유리나방, [Synanthedon tenuis (Butler) (Lepidoptera: Sesiidae)]의 성페로몬((Z, Z )-3, 13-octadecadien-1-ol.)에 의한 화학 통신교란(pheromone-mediated chemical communication disruption, PCD)의 효과에 대한 것이다. 본 PCD법은 우리나라 전남 순천과 경 남 진주의 2곳의 단감 과수원에서 2016년과 2017년에 총 4회 수행되었으며, PCD의 효과는 성페로몬 처리구와 무처리구에서의 평가용 트랩 포 획수로 나타내었다. 성페로몬 처리구의 평가용 트랩에 유인된 수컷 성충수는 무처리구에 유인된 수보다 유의하게 적었으며, 유인수 감소효과는 95.2~100% (평균 98.8±1.2%)이었다. 이러한 결과로 볼 때 성페로몬에 기반한 애기유리나방의 방제가 가능할 것으로 판단된다

The occurrence of exotic weeds and their influx into farmlands due to climate change poses many problems. Therefore, it is necessary to generate a prediction model for the occurrence pattern of these exotic weeds based on scientific evidence and devise prevention measures. The photosynthetic apparatus is known as the most temperaturesensitive component of a plant cell and its initial response to temperature stress is to inhibit the activation of photosystem II. This study investigated the potential of OJIP transients in assessing temperature stress in exotic weeds. The four exotic weeds currently flowing into Korean farmlands include Amaranthus spinosus, Conyza bonariensis, Crassocephalum crepidioides, and Amaranthus viridis. These weeds were treated at 5°C, 10°C, 15°C, 20°C, 25°C, 30°C, 35°C, and 40°C and the OJIP curves and JIP parameters were measured and analyzed. The results showed that heat and chilling stress affected the photosystem II (PSII) electron transport of A. spinosus, whereas C. crepidioides and A. viridis were more affected by high-temperature stress than by low-temperature stress. Lastly, C. bonariensis showed resistance to both high and low-temperature stress. The results of this study suggest that OJIP transients and JIP parameters can be used to analyze damage to the photosynthetic apparatus by temperature stress and that they can serve as sensitive indicators for the occurrence pattern of exotic weeds.

Pine wood nematode (PWN), Bursaphelenchus xylophilus causes devastating damage to pines worldwide. To develop new agent for controlling PWN, many kinds of compounds have been evaluated for their nematicidal activity against PWN with different bioassay system according to researchers. Therefore, it was hard to directly compare their activity. To establish standard procedure for bioassay, nematicidal activity of abamectin was tested and compared in different conditions. The tested conditions are following: 1) nematode density: 100 and 1000 nematodes in 0.1 and 1 mL, 2) amount of reagent: 0.1, 1, 10, 100 uL of abamectin solution which same amount of abamectin was dissolved in. We will report the results of tested nematicidal activity according to conditions.