구기자 잎을 이용한 특허제품 개발 및 기능성 식품소재에 관한 연구는 다수 진행되고 있으나 구기자 잎을 규격화 표준화하여 대량으로 공급할 수 있는 생산체계는 확립되어 있지 않다. 이에 구기자 육성품종 중에서 잎 생산에 알맞은 품종을 선발하고 가공용 잎을 대량으로 생산할 수 있는 예취시기를 확립코자 하였다. 구기자 11품종 중 잎 생산에 적합한 품종은 ‘명안’이었고, 다른 품종에 비하여 잎이 크고 분얼과 재생력이 왕성하였을 뿐만 아니라 잎 건물수량도 높았다. ‘명안’ 품종에서 구기자 잎 생산에 적합한 예취시기는 초장이 약 60 ~ 70 cm 자랐을 시기였고, 잎 수량은 5월 16일 수확 시 평균 106 ㎏/10a, 6월 20일 수확 시 평균 287 ㎏/10a로서 수확시기가 늦어질수록 직선적으로 증가되었다. 구기자의 지표성분인 베타인 함량을 1.43 ~ 2.63% 범위였고, 품종과 예취시기에 따라 함량이 다른데 생육이 진전 될수록 증가되는 경향이었다. 구기자나무 잎의 주요 생리기능성을 조사한 결과 항고혈압성을 나타내는 ACE 저해활성이 평균 84.4 ~ 90.8%로 높은 편이었고, 나머지 생리기능성은 20% 이하로 낮거나 검출되지 않았다.

Background : Acreage of rain-shelter plastic greenhouse to prevent anthrax is being gradually increased according to growing importance of safe Boxthorn production. But When Boxthorn is grown in the hot season in rain-shelter plastic greenhouse, Fertility decreases. The fertilization rate tends to be different according to cultivated variety and ventilation type of rain-shelter plastic greenhouse. Therefore it is necessary to identify cause and look for a solution. Methods and Results : In the experiment, ‘Cheongun’ cultivar was grown in the rain-shelter plastic greenhouses for the tests. Environment of rain-shelter plastic greenhouses, fertilization rate and density of flower visiting insect were investigated according to ventilation type. Pollen germination and pollen tube elongation on stigma were investigated according to temperature. In mid-July, the temperature on a clear day rose to 45℃ in rain-shelter plastic greenhouse of side vents. Pollen germination and pollen tube elongation on stigma were normal for 3 hours on 30, 35℃. Fertilization rate was somewhat reduced on 40℃ but Pollen germination and pollen tube elongation was good. On 45℃, fertilization rate was very poor and There was no pollen germination. Density of flower visiting insect in rain-shelter plastic greenhouse of roof and side vents was higher than that in rain-shelter plastic greenhouse of side vents. The fertilization rate on high temperature did not show any difference regardless of ventilation type. The rate of artificial cross-fertilization and airborne fertilization were high in rain-shelter plastic greenhouse of roof and side vents. It was necessary to improve airborne fertilization rate because airborne fertilization rate was significantly lower than artificial cross-fertilization regardless of ventilation type. Conclusion : When it was cultivated in rain-shelter plastic greenhouse, the reasons for the lowering of the fertilization rate were as follows. Density of flower visiting insect was low. Boxthorn, which was insect pollination crop, was needed sufficient flower visiting insect on flowering period. But it was insufficiency especially in rain-shelter plastic greenhouse of side vents. Another reason was decrease in pollen germination and pollen tube elongation. Pollen germination was suppressed in the high temperature.

As the farmers who grow Chinese matrimony vine (Lycium chinense Miller) in rain-shelter greenhouses increase, it is necessary to develop a cultivar with early-flowering. In addition, the new varieties should be continuously selected in order to adapt to climate change and to respond to future demands. The new line, CB07423-104, was selected from the cross between Cheongmyeong (IT232706) and CB04341-286 in 2007 to breed a cultivar with early flowering and high yielding. Its preliminary yield tests were performed from 2009 to 2010 and the selected line was named Cheongyang 17. Its regional yield trial was carried out in Cheongyang, Yesan and Jindo from 2011 to 2013 and Cheongyang 17 was registered as the new variety, ‘Cheonghong’ (Certificate on grant of plant variety rights: Grant number No.5642, Protection period 06/07/2015 ~ 05/07/2035) in 2013. The major characteristics were summarized as follows; The plant shape was spreading type. Leaf had ellipsoidal small sizes and 3~5 leaves on a node. The fruit was oblong and yellowish red. The flowering time was June 17 and faster about 11 days than the check ‘Cheongmyeong’. The branching was generated less than the check variety. This cultivar has a lot of flowers bloom per a node and many fruits per a plant. The resistances to anthracnose and eriophyidae mite were a little better than that of the check variety. The content of betaine of dried-fruit and brix degree of fresh fruit were higher than those of the check. The dried-fruit yield was 16 percent higher than the check at regional yield trials conducted at Cheongyang, Yesan and Jindo. Applications are customarily available in both medicinal and edible. This variety has self-incompatibility. So, the companion variety, Cheongmyeong, was required as pollinizer and recommended to plant 1 : 1.