Identifying Quality Protein Maize Inbred Lines for Improved Nutritional Value of Maize in Southern Africa

被引:12
|
作者
Amegbor, Isaac [1 ,2 ]
van Biljon, Angeline [1 ]
Shargie, Nemera [3 ]
Tarekegne, Amsal [4 ]
Labuschagne, Maryke [1 ]
机构
[1] Univ Free State, Dept Plant Sci, ZA-9300 Bloemfontein, South Africa
[2] CSIR Savanna Agr Res Inst, Tamale 00233, Ghana
[3] Agr Res Council Grain Crops, ZA-2520 Potchefstroom, South Africa
[4] Zamseeds, 6483 Mugoti Rd, Lusaka 10101, Zambia
基金
新加坡国家研究基金会;
关键词
maize inbred lines; nutritional value; protein quality; QPM; TRYPTOPHAN; YIELD;
D O I
10.3390/foods11070898
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Malnutrition, as a result of deficiency in essential nutrients in cereal food products and consumption of a poorly balanced diet, is a major challenge facing millions of people in developing countries. However, developing maize inbred lines that are high yielding with enhanced nutritional traits for hybrid development remains a challenge. This study evaluated 40 inbred lines: 26 quality protein maize (QPM) lines, nine non-QPM lines, and five checks (three QPM lines and two non-QPM lines) in four optimum environments in Zimbabwe and South Africa. The objective of the study was to identify good-quality QPM inbred lines for future hybrid breeding efforts in order to increase the nutritional value of maize. The QPM lines had a lower protein content (7% lower) than that of the non-QPM lines but had 1.9 times more tryptophan and double the quality index. The lysine- and tryptophan-poor alpha-zein protein fraction was 41% lower in QPM than in non-QPM, with a subsequent increase in gamma-zein. There was significant variation within the QPM inbred lines for all measured quality characteristics, indicating that the best lines can be selected from this material without a yield penalty. QPM lines that had both high protein and tryptophan levels, which can be used as parents for highly nutritious hybrids, were identified.
引用
收藏
页数:10
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