QTL mapping of coleorhiza length in maize (Zea mays L.) under two germination environmental conditions

Publication Type:Journal Article
Year of Publication:2011
Authors:Jiang, X, Tian, B, Zhang, W, Wang, G, Wang, J
Journal:Plant Breeding
Volume:130
Issue:6
Date Published:2011
ISBN Number:1439-0523
Keywords:coleorhiza length, maize, QTL, Seed germination, SSR
Abstract:

With 2 figures and 3 tablesAbstract In our present study, using molecular marker technology, we aimed to identify the genetic factors controlling the length of coleorhiza during seed germination based on a population of recombinant inbred lines (RILs) derived from Xinzi517 × B73. The genetic linkage map was constructed with 255 simple sequence repeat markers, which covered 2399 cM of maize genome with an average mapping distance of 9.4 cM. We detected a total of 10 putative quantitative trait loci (QTLs) using composite interval mapping, among which six QTLs were detected on chromosomes 1, 2, 7 and 9 (10°C, 28 day), whereas four QTLs were detected on chromosomes 1, 2, 3 and 9 (25°C, 7 day). The percentage of phenotypic variance (R2) explained by QTL ranged from 5.18 to 16.67 (10°C, 28 day) and 6.73–11.46 (25°C, 7 day), respectively. These results provided the foundation for detecting additional QTL and discovering more favourable alleles for high vigour seed of maize in future study.

URL:http://dx.doi.org/10.1111/j.1439-0523.2011.01893.x
Short Title:Plant Breeding
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