Journal
GENETIKA-BELGRADE
Volume 43, Issue 2, Pages 263-276Publisher
SERBIAN GENETICS SOC
DOI: 10.2298/GENSR1102263N
Keywords
drought; grain yield; maize; morphological traits; QTLs
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Nikolic A., V. Andelkovic, D. Dodig, and D. Ignjatovic Micic (2011): Quantitative trait loci for yield and morphological traits in maize under drought stress.- Genetika, Vol 43, No. 2, 263 - 276. Drought is one of the most important factors contributing to crop yield loss. In order to develop maize varieties with drought tolerance, it is necessary to explore the genetic basis. Mapping quantitative trait loci (QTL) that control the yield and associate agronomic traits is one way of understanding drought genetics. QTLs associated with grain yield (GY), leaf width (LW3, LW4) plant height (PH), ear height (EH), leaf number (NL), tassel branch number (TBN) and tassel length (TL) were studied with composite interval mapping. A total of 43 QTLs were detected, distributed on all chromosomes, except chromosome 9. Phenotypic variability determined for the identified QTLs for all the traits was in the range from 20.99 to 87.24%. Mapping analysis identified genomic regions associated with two traits in a manner that was consistent with phenotypic correlation among traits, supporting either pleiotropy or tight linkage among QTLs.
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