Quantitative trait loci analysis of plant height and ear height in maize (Zea mays L.) |
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| Authors: | Z M Zhang M J Zhao H P Ding T Z Rong G T Pan |
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| Institution: | (1) Maize Research Institute, Sichuan Agriculture University, Ya’an, 625014, China;(2) Net Education Colleges, Sichuan Agriculture University, Ya’an, 625014, China |
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| Abstract: | Genetic map containing 103 microsatellite loci obtained on 200 F2 plants derived from the cross R15 × 478 was used for quantitative trait loci (QTL) mapping in maize. QTLs were characterized
in a population of 200 F2:4 lines, derived from selfing the F2 plants, and were evaluated with two replications in two environments. QTL determinations were made from the mean of these
two environments. Plant height (PH) and ear height (EH) were measured. Using composite interval mapping (CIM) method, a total
of 14 distinct QTLs were identified: nine for PH and five for EH. Additive, partial dominance, dominance, and overdominance
actions existed among all detected QTLs affecting plant height and ear height. The QTLs explained 78.27% of the phenotypic
variance of PH and 41.50% of EH. The 14 QTLs displayed mostly dominance or partial dominance gene action and mapped to chromosomes
2, 3, 4, 8, and 9.
The text was submitted by the authors in English. |
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