Thai rice is favored by large numbers of consumers of all continents because of its excellenttaste,fragrant aroma and fine texture.Among all Thai rice varieties,Thai Hommal rice is themost preferred.Classification of ...Thai rice is favored by large numbers of consumers of all continents because of its excellenttaste,fragrant aroma and fine texture.Among all Thai rice varieties,Thai Hommal rice is themost preferred.Classification of rice as premium quality requires that almost all grain kernels ofthe rice be perfectly whole with only a small quantity of foreign particles.Of all the foreignpartidles found in rice,rice weevils can wreck severest havoc on the quality and quantity of ricesuch thatpremiumitograde rice.It is widely known that ricemillers adoptt the birth and propagation of riceweevils,rice which end up inthebodyweevilscould beapproxilplied and thereby nooverdosantity of rice weevilsinboth Inear infrared spec-TRtroscop)spectrometer was usedinthis researchal 2500 nm.A total of 20 levels of riceweevil infestational mature rice weevils were appliedto 1680 rice samples.The spectral data and quantity of weevils are analyzed by partial leastsquare regression(PLSR)to establish the model for prediction.The results show that the modelis able to estimate the quantity of weevils in milled Hommali rice and brown Hommali rice withhigh Ral of 0.96 and 0.90,high RPD of 6.07 and 3.26 and smalil bias of 2.93 and 2.94,respectively.展开更多
Insects of the genus Sitophilus are among the most destructive pests in rice storage, and the best strategy to control it is to use resistant genotypes. In this study, 26 upland rice elite lines were evaluated for Sit...Insects of the genus Sitophilus are among the most destructive pests in rice storage, and the best strategy to control it is to use resistant genotypes. In this study, 26 upland rice elite lines were evaluated for Sitophilus weevil reaction on grain weight. The seeds were placed in plastic recipients stored in a room with temperature and lightning simulating a warehouse environment. The number of living weevils and the grain weight were obtained in two evaluations, one 35 days after storage, and the other 35 days after infestation. The lines differed statistically for number of living weevils and for grain weight in both evaluations. The correlations between these two characters were -?0.99 and -?0.47 for the first and the second evaluation (P < 0.05), respectively. The lines BRS Pepita, AB 112089 and AB 112090 were the most susceptible. Seventeen of the twenty-six elite lines were resistant in both evaluations and could be successfully used in upland rice breeding programs.展开更多
文摘Thai rice is favored by large numbers of consumers of all continents because of its excellenttaste,fragrant aroma and fine texture.Among all Thai rice varieties,Thai Hommal rice is themost preferred.Classification of rice as premium quality requires that almost all grain kernels ofthe rice be perfectly whole with only a small quantity of foreign particles.Of all the foreignpartidles found in rice,rice weevils can wreck severest havoc on the quality and quantity of ricesuch thatpremiumitograde rice.It is widely known that ricemillers adoptt the birth and propagation of riceweevils,rice which end up inthebodyweevilscould beapproxilplied and thereby nooverdosantity of rice weevilsinboth Inear infrared spec-TRtroscop)spectrometer was usedinthis researchal 2500 nm.A total of 20 levels of riceweevil infestational mature rice weevils were appliedto 1680 rice samples.The spectral data and quantity of weevils are analyzed by partial leastsquare regression(PLSR)to establish the model for prediction.The results show that the modelis able to estimate the quantity of weevils in milled Hommali rice and brown Hommali rice withhigh Ral of 0.96 and 0.90,high RPD of 6.07 and 3.26 and smalil bias of 2.93 and 2.94,respectively.
文摘Insects of the genus Sitophilus are among the most destructive pests in rice storage, and the best strategy to control it is to use resistant genotypes. In this study, 26 upland rice elite lines were evaluated for Sitophilus weevil reaction on grain weight. The seeds were placed in plastic recipients stored in a room with temperature and lightning simulating a warehouse environment. The number of living weevils and the grain weight were obtained in two evaluations, one 35 days after storage, and the other 35 days after infestation. The lines differed statistically for number of living weevils and for grain weight in both evaluations. The correlations between these two characters were -?0.99 and -?0.47 for the first and the second evaluation (P < 0.05), respectively. The lines BRS Pepita, AB 112089 and AB 112090 were the most susceptible. Seventeen of the twenty-six elite lines were resistant in both evaluations and could be successfully used in upland rice breeding programs.
