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- W137108767 abstract "Plant height has become one of important agronomic traits with the increase of planting densityrecently and the rapid developments of molecular markers have provided powerful tools to localize importantagronomic QTL at the genomic level. The purposes of this investigation are to map plant height QTL with mo-lecular markers and to analyze their genetic effects in maize. An F2:3 population from an elite combination(Zong3 × 87-1) was utilized for evaluating plant height in two locations, Wuhan and Xiangfan, with a ran-domized complete block design. The mapping population included 266 F2:3 family lines. A genetic linkagemap, containing 150 SSR and 24 RFLP markers, was constructed, spanning a total of 2 531.6 cm with an av-erage interval of 14.5 cm. Totally 10 QTL affecting plant height were mapped on six different chromosomeswith the composite interval mapping. Seven of 10 QTL were detected in two locations. The contributions tophenotypic variations for the single QTL varied between 5.3 and 17.1%. Additive, partial dominance, domi-nance, and overdominance actions existed among all detected QTL affecting plant heights. A large number ofdigenic interactions for plant height were detected by two-way analyses of variance. 107 and 98 two-locus com-binations were found to be significant at a 0.01 probability level in two locations respectively. 23 of them weresimultaneously detected in both locations. They accounted for phenotypic variations of 4.5 -11%. It was no-ticed that a locus, umc1122, had digenic interactive effects with other four different loci for plant height,which distributed on three chromosomes. A few of plant height QTL was involved in significant digenic inter-actions, but most significant interactions occurred between markers that are not adjacent to mapped QTL.These results demonstrated that epistatic interactions might play an equal importance role as the single-locuseffects in determining plant height of maize." @default.
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- W137108767 date "2003-01-01" @default.
- W137108767 modified "2023-09-27" @default.
- W137108767 title "QTL Analysis for Plant Height with Molecular Markers in Maize" @default.
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