Articles

Maize core collection for increased grain quality


Abstract


Formation of the maize (Zea mays L) core collection for increased macronutrient content is presented. Among
3,443 populations from Maize Research Institute (MRI), Zemun Polje (ZP), a total of 352 accessions (around 10.2%) were chosen for the core collection. The criteria were increased protein, oil and/or starch content in the kernel of the accessions, as well as good combining ability (CA) that was tested with two Lancaster and one each BSSS and Iodent testers. Average values for protein, oil and starch content for the whole collection were 11.5%, 4.2% and 68.9%, respectively. On the other hand, averages for the core collection were 13.6% for proteins, 7.7% for oil and 74.1% for starch, and they were significantly higher than for the whole collection (p<0.001). Small negative, but highly significant correlations were found for protein content and latitude (-0.119; p<0.01), as well as for starch content and altitude (-0.090; p<0.01) of the collection sites for Western Balkan landraces. Positive small significant correlations were obtained for oil and altitude (0.069; p<0.05) and starch and latitude of (0.077; p<0.05) collection site, while medium highly significant positive correlation was found for protein content and altitude of collection site (0.237; p<0.01). Eighteen populations with increased protein and/or oil content and with good universal com- bining ability (with Lancaster, BSSS, and Iodent testers) were chosen to form the mini-core collection for grain quality, and they are planned for further detailed biochemical, phenotypic and genetic characterisation.

Keywords

grain quality, macronutrient, maize

Full Text:

PDF