甜玉米乳熟期籽粒维生素A源和维生素E组分的变异  

Variation of Provitamin A and Vitamin E Components at Milk Stage of Kernel Development in Sweet Corn

作　　者：冯发强[1] 王国华[1] 王青峰[1] 杨瑞春[1] 李小琴[1,2] 

机构地区：[1]华南农业大学农学院,广东广州510642 [2]亚热带农业生物资源保护与利用国家重点实验室/华南农业大学,广东广州510642

出　　处：《作物学报》2014年第7期1227-1234,共8页Acta Agronomica Sinica

基　　金：国家自然科学基金项目(31071427);高等学校博士学科点专项科研基金项目(20114404110005)资助

摘　　要：维生素A和维生素E是人与动物必须从食物中摄取的微量营养物质。甜玉米是人类直接食用的一种鲜食玉米类型。本研究利用高效液相色谱法测定了47份甜玉米自交系籽粒乳熟期的维生素A源和维生素E各组分的含量。结果表明,不同基因型甜玉米材料间维生素A源和维生素E各组分及α/γ-生育酚存在显著差异。非维生素A源的叶黄素和玉米黄质为维生素A组分中的主要成分,γ-生育酚为维生素E组分中的主要成分。相关分析表明多数性状间表现为显著正相关或不相关,其中β-胡萝卜素极显著正相关于玉米黄质、β-隐黄质和α-类胡萝卜素,维生素E各组分两两极显著相关,α/γ-生育酚极显著负相关于δ-生育酚和γ-生育酚,极显著正相关于玉米黄质和α-生育酚,β-胡萝卜素与α-生育酚呈正相关。这些数据为进一步研究甜玉米籽粒中维生素A源和维生素E的代谢和微营养品质的改良提供了有益的表型数据。Vitamin A and Vitamin E are two kinks of micronutrients that must be acquired regularly from dietary sources. Sweet corn is a type of fresh corn for direct consumption by human beings. The content of provitamin A and vitamin E components at milk stage of kernels development were measured by HPLC in 47 sweet corn lines. The results showed that the contents of caro tenoids and tocopherols and the a/y tocopherol ratio were extremely different among 47 sweet corn lines. The non-provitamin A, including lutein and zeaxanthin, are the main components of the total carotenoids. The main component of vitamin E is γ-tocopherol. The pearson correlation analysis showed that significantly positive correlation and non-correlation were detected among most traits. β-carotene was significantly positive correlated with zeaxanthin, β-cryptoxanthin and a-carotenoids, respec- tively. Three isomers of vitamin E were significantly correlated between each other. The ratio of a/y tocopherol had a significantly negative correlation with δ-tocopherol and y-tocopherol and a significantly positive correlation with zeaxanthin and a-tocopherol. A significantly positive association was found between β-carotene and a-tocopherol. These results provide useful information for the research on provitamin A and vitamin E metabolism and nutritional improvement in sweet corn.

关 键 词：甜玉米 乳熟期 维生素A源 维生素E 高效液相色谱 

分 类 号：S513[农业科学—作物学]