Kernel color is an important trait for assessing the commercial and nutritional quality of foxtail millet. Yellow pigment content （YPC） and carotenoid components （lutein and zeaxanthin） of 270 foxtail millet acces...Kernel color is an important trait for assessing the commercial and nutritional quality of foxtail millet. Yellow pigment content （YPC） and carotenoid components （lutein and zeaxanthin） of 270 foxtail millet accessions, including 50 landraces and 220 improved cultivars, from four different eco-regions in China were surveyed using spectrophotometry and high performance liquid chromatography methods. Results indicated that YPC had rich variance, ranging from 1.91 to 28.54 mg kg-1, with an average value of 17.80 mg kg-1. The average YPC of improved cultivars （18.31 mg kg-1） was significantly higher than that of landraces （15.51 mg kg-l）. The YPC in cultivars from the Loess Plateau spring sowing region （LPSSR） was the highest （20.59 mg kg-~）, followed by the North China summer sowing region （NCSSR, 18.25 mg kg-1）, the northeast spring sowing region （NSSR, 17.25 mg kg-1）, and the Inner Mongolia Plateau spring sowing region （IMPSSR, 13.92 mg kg-1）. The variation coefficients of YPC in cultivars from NSSR, LPSSR, and IMPSSR were higher than that from NCSSR. A similar carotenoid profile was also obtained for 270 foxtail millet cultivars. Lutein and zeaxanthin accounted for approximately 55-65% of YPC in accessions. The lutein content was higher than zeaxanthin content in all cultivars. The ratio of lutein to zeaxanthin ranged from 1.51 to 6.06 with an average of 3.34. YPC was positively correlated with lutein （r=0.935, P〈0.01）, zeaxanthin （r=0.808, P〈0.01 ）, and growth duration （t=0.488, P〈0.01 ）, whereas it was negatively correlated with grain protein （t=-0.332, P〈0.01） and 1 000-kernel weight （t=-0.153, P〈0.05）. Our study is useful for screening and selecting cultivars with high levels of yellow pigment and for enhancing phytochemical concentrations in breeding programs.展开更多
以小米副产物小米糠为原料,在单因素试验的基础上,采用响应面法优化小米糠黄色素的超声波提取工艺,研究超声功率、超声液料比、提取温度、提取时间对提取效果的影响。结果表明:超声功率384 W,液料比30∶1 m L·g-1,提取温度42℃,提...以小米副产物小米糠为原料,在单因素试验的基础上,采用响应面法优化小米糠黄色素的超声波提取工艺,研究超声功率、超声液料比、提取温度、提取时间对提取效果的影响。结果表明:超声功率384 W,液料比30∶1 m L·g-1,提取温度42℃,提取时间34.6 min,小米糠黄色素OD值达到3.5±0.2。展开更多
基金supported by the Natural Science Foundation of Shandong,China(ZR2014YL021)the earmarked fund for China Agricultural Research System(CARS-06)+1 种基金the Shandong Agricultural Research System Innovation Team,China(SDAIT-14-03)the Key Projects of Science and Technology Innovation of Shandong Academy of Agricultural Sciences,China(2014CXZ-4)
文摘Kernel color is an important trait for assessing the commercial and nutritional quality of foxtail millet. Yellow pigment content （YPC） and carotenoid components （lutein and zeaxanthin） of 270 foxtail millet accessions, including 50 landraces and 220 improved cultivars, from four different eco-regions in China were surveyed using spectrophotometry and high performance liquid chromatography methods. Results indicated that YPC had rich variance, ranging from 1.91 to 28.54 mg kg-1, with an average value of 17.80 mg kg-1. The average YPC of improved cultivars （18.31 mg kg-1） was significantly higher than that of landraces （15.51 mg kg-l）. The YPC in cultivars from the Loess Plateau spring sowing region （LPSSR） was the highest （20.59 mg kg-~）, followed by the North China summer sowing region （NCSSR, 18.25 mg kg-1）, the northeast spring sowing region （NSSR, 17.25 mg kg-1）, and the Inner Mongolia Plateau spring sowing region （IMPSSR, 13.92 mg kg-1）. The variation coefficients of YPC in cultivars from NSSR, LPSSR, and IMPSSR were higher than that from NCSSR. A similar carotenoid profile was also obtained for 270 foxtail millet cultivars. Lutein and zeaxanthin accounted for approximately 55-65% of YPC in accessions. The lutein content was higher than zeaxanthin content in all cultivars. The ratio of lutein to zeaxanthin ranged from 1.51 to 6.06 with an average of 3.34. YPC was positively correlated with lutein （r=0.935, P〈0.01）, zeaxanthin （r=0.808, P〈0.01 ）, and growth duration （t=0.488, P〈0.01 ）, whereas it was negatively correlated with grain protein （t=-0.332, P〈0.01） and 1 000-kernel weight （t=-0.153, P〈0.05）. Our study is useful for screening and selecting cultivars with high levels of yellow pigment and for enhancing phytochemical concentrations in breeding programs.
文摘以小米副产物小米糠为原料,在单因素试验的基础上,采用响应面法优化小米糠黄色素的超声波提取工艺,研究超声功率、超声液料比、提取温度、提取时间对提取效果的影响。结果表明:超声功率384 W,液料比30∶1 m L·g-1,提取温度42℃,提取时间34.6 min,小米糠黄色素OD值达到3.5±0.2。
