Related Experiment Video
Updated: Aug 9, 2026

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis
Published on: July 23, 2014
Duplicated cytosolic malate dehydrogenase genes in Zea mays
1Department of Genetics, North Carolina State University, Raleigh, North Carolina 27650.
Abstract:
Six inbred lines of Zea mays expressing different soluble (cytosolic) malate dehydrogenase (sMDH) zymogram phenotypes were analyzed genetically. sMDH was found to be coded for by unlinked duplicated loci in four of these inbred lines. The remaining two lines were found not to possess these duplicated loci. Furthermore, the duplicated loci, sMdh1 and sMdh2, have been found to be located on different chromosomes: sMdh1 on chromosome 1L linked to Amp1, and sMdh2 on chromosome 5S linked to Cat1 and Amp3. The importance of finding sMDH encoded by duplicated loci is discussed in relation to the role of chromosomal rearrangements, the relationship between the cytoplasmic and mitochondrial enzymes, and the evolution of Z. mays.
Related Concept Videos
C4 Pathway and CAM
C4 Pathway
The C4 pathway is used by plants such as...
Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal chance to...
Animal Mitochondrial Genetics
Dihybrid Crosses
Monohybrid Crosses

