Characterization of the first dominant dwarf maize mutant carrying a single amino acid insertion in the VHYNP domain of the dwarf8 gene

Evaluation of wheat growth, morphological characteristics, biomass yield and quality in Lunar Palace-1, plant factory, green house and field systems

“…The results showed that the wheat genotype and environmental conditions could both affect plant height, and the effects of environment on plant height decreased gradually with plant development. In recent years great attention has been paid to investigate the mechanisms of plant and ear height for increasing planting density and preventing plants from lodging or breaking [31]. The clear tendency for tall straw and resistance to different environment suggests that this relationship has a genetic basis that could be explained either by linkage, between one or more genes controlling resistance and genes controlling straw height, or by pleiotropy, where genes that promote shorter straw also promote susceptibility.…”

Qualitative and Quantitative Trait Polymorphisms in Maize

“…It was proposed to use isogenic backgrounds to estimate differential allelic effects . Recently, Cassani et al (2009) characterized an amino acid insertion in the VHYNP domain of the maize Dwarf8 gene that also leads to a dwarf phenotype but less severe than other mutants with mutations in DELLA domains. The Dwarf8 gene is one of the limited successful studies to resolve allelic function at the sequence level.…”

Genetic analysis of resistance to maize streak virus disease in dwarf maize germplasm

“…Three dwarf maize hybrids have thus far been released commercially from this programme (AC 71, AC 31 and AC 133). There are numerous dwarfing genes that have hitherto been identified, such as the dwarf mutants (dwarf1-dwarf9; Cassani et al, 2009) and the brachytic mutants (br1-br3; Cassani et al, 2010). Several of the dwarf mutations have not been used to improve yield because of abnormal phenotypes that they produce.…”

“…Mashingaidze and Chinhema (2004) reported that roots of dwarf hybrids were thinner and more fibrous than those of tall hybrids, and hypothesized that fine and fibrous rooting systems can be expected to be more efficient in extracting immobile nutrients and water because there will be more root surface area in contact with the soil. Dwarfing genes have caused plants to be, among other things, resistant to storm damage, lodging, and are therefore more tolerant to high populations when compared to normal-height varieties (Begna et al, 1999;Cassani et al, 2009). While hybrids developed by ACFD might have some of these comparative advantages, they have limited resistance to MSD.…”