Agrobacterium-Mediated Transformation of Maize of Ukrainian Breeding - Cytology and Genetics

Abstract Since Ukraine is a powerful maize exporter in the world, screening genotypes susceptible to genetic transformation among those cultivated on its territory and the development of an effective technology for the transformation of maize of Ukrainian breeding are relevant. Precultivated immature maize embryos of nine genotypes (inbred lines and hybrids) were subjected to Agrobacterium-mediated transformation. Three strains of A. tumefaciens and three vector constructs, which contained the selective marker gene of neomycin phosphotransferase II, as well as the reporter genes of green fluorescent protein or β-glucuronidase, were used in the work. Transgenic plants were selected on nutrient media with paromomycin. For six genotypes, shoot regeneration was observed after transformation on selective media. The presence of transgenes in 43 clones obtained from four genotypes using all available vectors was revealed by the PCR method. The transformation frequency varied from 0 to 27% in individual experiments. A strong correlation was found between frequencies of the regeneration and the transformation between genotypes and donor plants of the same genotype. The use of the pCB271 vector, which contained monocot nucleotide sequences of gene expression regulation upstream of the selective marker gene, namely the intron of the maize hsp70 gene, significantly increased the frequency of shoot regeneration after transformation. Analysis of T1 generation plants revealed single-locus integration of transgenes into the plant genome. The proposed protocol of genetic transformation using paromomycin as a selective agent is effective in obtaining transgenic maize lines and hybrids of Ukrainian breeding. Three genotypes (inbred line DK232 and hybrids KP7×PRZh5 and KS277×RS15) were selected as the most susceptible among tested genotypes to Agrobacterium-mediated transformation and promising for further research on the production of transgenic maize plants.

SpringerLink
More seed for the corn gene pool brought from the maize country on the other side of the pond by my good corn collaborator @yungleaf

#ZeaMays #Corn #GeneticDiversity #Landrace #AdaptiveAgriculture #FrieFrø
Sorting chinmarked corn from my genetically diverse sweet corn landrace. Will isolate this with chinmarking this year and see if I can get the pattern to express itself more along with high anthocyanin content (coloring) #landracegardening #corn #chinmarking #plantbreeding #zeamays #sweetcorn
Zea Mays, Doctor Deseo, Belako eta Esne Beltza besteak beste Hondarribiko Jaietan - Hondarribia

Gaurkotasuna Lanak eta trafikoko mozketak guztiak Gaurkotasuna Gazteriako albiste guztiak 2024-08-12 Hondarribiko Jaietarako hiru aste falta diren arren, dagoeneko ezagutzen dira...

Hondarribia

Gaur 24 urte ama izan nintzen. Nire amaurtebetetzea da. Neuk ere flipatzen dut horrekin. Eta 🎶poztasun handi batek besarkatzen nau 🎶

Eta 24 urteren ostean hementxe, neskatxiekin, ederto batean pasatzen #AltxaPorrue ren festan #Bira n, #ZeaMays en kontzertuan, aurreko zapatuan⬇️

https://www.instagram.com/p/C5v9iG6NXiz/?igsh=em90ZGM2Y3pzaXV0

@anagalarraga1 @GoizaldeLandabaso
@iratiiciar
@desplazatua

https://youtu.be/01Sp9dtz7L8?si=kBqrgJpMbYR2lQM5

La meva #CançóDelDia per al dimarts 21 de novembre és aquesta de les #ZeaMays #Bilbo #PopRock ➗!

Adore Kemena Kuraia

YouTube

Geordnete Unordnung

#Mais #Futtermais #Natur #ZeaMays