Breeding Novel Short Grain Rice for Tropical Region to Combine Important Agronomical Traits,Biotic Stress Resistance and Cooking Quality in Koshihikari Background     

Saichompoo Uthomphon  Narumol Possawat  Nakwilai Pawat  Thongyos Peeranut  Nanta Aekchupong  Tippunya Patompong  Ruengphayak Siriphat  Itthisoponkul Teerarat  Bueraheng Niranee  Cheabu Sulaiman  Malumpong Chanate 《水稻科学》2021,28(5):479-492

Breeding program strategies to develop novel short grain white rice varieties such as japonica (short grain) that introgress biotic stress resistance and high grain quality have been developed using indica rice (Pin Kaset + 4 and Riceberry) for applications in japonica rice (Koshihikari) improvement. Four breeding lines showing promising agronomic performance with short grain and low amylose content (< 20%) were obtained. In addition, sensory testing of these breeding lines showed high scores that similar to Koshihikari. Two promising lines, KP48-1-5 and KP48-1-9, which possessed a combination of four genes resistance to different biotic stresses (Bph3 + TPS + Xa21 + Pi-ta) and four genes for grain quality (GS3 + SSIIa + wx^b + badh2), were developed using marker-assisted selection (MAS) with the pedigree method. The current study clearly illustrated the successful use of MAS in combining resistance to multiple biotic stresses while maintaining a high yield potential and preferred grain quality. Moreover, the results indicated that this breeding program, which includes crossing temperate japonica with indica, can create novel short grain rice varieties adapted to a tropical environment, like the japonica type.  相似文献   

Quantification and rep‐PCR characterization of Salmonella spp. in retail meats and hospital patients in Northern Thailand     

Teerarat Prasertsee  Nipa Chokesajjawatee  Pannita Santiyanont  Phongsakorn Chuammitri  Manu Deeudom  Pakpoom Tadee  Prapas Patchanee 《Zoonoses and public health》2019,66(3):301-309

Human salmonellosis is a major public health problem worldwide. Infections can pass to humans by contact with contaminated substances in the food chain. This study aimed to determine the prevalence and contamination levels of Salmonella isolated from pork, chicken and beef sold in different types of retail stores in Chiang Mai and Lamphun provinces and to investigate the genetic relatedness among Salmonella isolates in food chains in that area. A total of 360 meat samples from supermarkets, mini‐grocery stores and fresh markets were obtained. Salmonella Rissen and S. Weltevreden were found in all meat sample types and in human cases. The overall prevalence of Salmonella in the chicken, pork and beef samples was 34.17%, 32.50% and 3.33%, respectively. Quantitatively, Salmonella contamination was highest in pork (1.24 log₁₀MPN/g), followed by chicken (1.08 log₁₀MPN/g), and beef (0.75 log₁₀MPN/g). The highest frequency of Salmonella contamination was found at the fresh markets (85.71%), whereas the highest quantity of contamination level was from mini‐grocery stores (1.27 log₁₀MPN/g). The rep‐PCR analysis results revealed that some of the Salmonella from meat samples and human cases were identical clones.  相似文献