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Consumer confidence and consumers’ preferences for infant formulas in China
LI Sai-wei, ZHU Chen, CHEN Qi-hui, LIU Yu-mei
2019, 18 (8): 1793-1803.   DOI: 10.1016/S2095-3119(19)62589-X
Abstract153)      PDF in ScienceDirect      
A series of safety incidents related to domestically-produced infant formulas (DIFs) almost destroyed Chinese consumer confidence in domestic dairy products.  Understanding consumer confidence and its effect on consumption behavior is important to restore consumer confidence and enhance the competitiveness of domestic dairy industry.  This article first measures Chinese consumer confidence in DIFs safety using a two-dimension scale (optimism and pessimism) and then investigates its effect on consumers’ preferences for DIFs through a choice experiment.  Involving 450 consumers residing in Beijing, Tianjin and Shijiazhuang, the experiment elicited information on their preferences for DIFs with six attributes (organic raw milk, farm-to-table traceability, region of origin, quality certification, animal welfare, and price).  Our analysis yields four findings.  First, Chinese consumers still lack confidence in DIFs safety.  Second, quality certification is the most preferred product characteristic, followed by organic raw milk and farm-to-table traceability.  Third, serving as a signal of high quality, price exerts a positive impact on choices of DIFs for pessimistic consumers.  Finally, consumer preferences for farm-to-table traceability and region of origin are significantly influenced by consumer confidence.
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A Co-Dominant Marker BoE332 Applied to Marker-Assisted Selection of Homozygous Male-Sterile Plants in Cabbage (Brassica oleracea var. capitata L.)
CHEN Chen, ZHUANG Mu, FANG Zhi-yuan, WANG Qing-biao, ZHANG Yang-yong, LIU Yu-mei
2013, 12 (4): 596-602.   DOI: 10.1016/S2095-3119(13)60277-4
Abstract1193)      PDF in ScienceDirect      
The dominant genic male sterility (DGMS) gene CDMs399-3 derived from a spontaneous mutation in the line 79-399-3 of spring cabbage (Brassica oleracea var. capitata L.), has been successfully applied in hybrid seed production of several cabbage cultivars in China. During the development of dominant male sterility lines in cabbage, the conventional identification of homozygous male-sterile plants (CDMs399-3/CDMs399-3) is a laborious and time-consuming process. For marker-assisted selection (MAS) of the gene CDMs399-3 transferred into key spring cabbage line 397, expressed sequence tag-simple sequence repeats (EST-SSR) and SSR technology were used to identify markers that were linked to CDMs399-3 based on method of bulked segregant analysis (BSA). By screening a set of 978 EST-SSRs and 395 SSRs, a marker BoE332 linked to the CDMs399-3 at a distance of 3.6 cM in the genetic background of cabbage line 397 were identified. 7 homozygous male-sterile plants in population P1170 with 20 plants were obtained finally via MAS of BoE332. Thus, BoE332 will greatly facilitate the transferring of the gene CDMs399-3 into the key spring cabbage line 397 and improve the application of DGMS in cabbage hybrid breeding.
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Transformation of Cabbage (Brassica oleracea L. var. capitata) with Bt cry1Ba3 Gene for Control of Diamondback Moth 
YI Deng-xia, CUI Lei, LIU Yu-mei, ZHUANG Mu, ZHANG Yang-yong, FANG Zhi-yuan , YANG Li-mei
2011, 10 (11): 1693-1700.   DOI: 10.1016/S1671-2927(11)60167-3
Abstract2358)      PDF in ScienceDirect      
To obtain transgenic cabbage line with broad insect resistance, a new synthetic Bacillus thuringiensis cry1Ba3 gene was introduced into white cabbage via Agrobacterium tumefaciens-mediated transformation and 37 transformants were obtained. Polymerase chain reaction (PCR) and Southern blot analyses confirmed that cry1Ba3 was successfully inserted into the genome of cabbage. Reverse transcription-polymerase chain reaction (RT-PCR) demonstrated that cry1Ba3 was expressed. Western blot results confirmed the production of insecticidal protein encoded by cry1Ba3. Insect bioassays showed that transgenic cabbages effectively controlled both susceptible and Cry1Ac-resistant diamondback moth (DBM) larvae.
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