In the south part of Ukraine the haplotype of Rht8c and Ppd-D1a genes is highly distributed among modern bread wheat varieties. During the time of breeding program it has been selected as one of the most important adaptive complex for plants of this region. Genetic distance between Rht8c and Ppd-D1a was clarified.
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Investigations of the pleiotropic effects of GA-sensitive (Rht8) and GA-insensitive (Rht-B1, Rht-D1) dwarfing genes and a gene that determines the response of plants to photoperiod--Ppd-D1 were carried out for three years in the southern step region of Black Sea bank on five different genetic backgrounds. It is shown that in addition to direct effects on plant height GA-sensitive and GA-insensitive dwarfing genes have pleiotropic effects on all studied traits except the number of fertile spikelets. Presence of the dwarfing genes in the genotype of tall forms led to the decrease of stem and ear length, and at the same time to the increase of ear density.
View Article and Find Full Text PDFIn the south part of Ukraine the haplotype of Rht8c and Ppd-D1a genes is highly distributed among modern bread wheat varieties. During the time of breeding program it has been selected as one of the most important adaptive complex for plants of this region. Genetic distance between Rht8c and Ppd-D1a was clarified.
View Article and Find Full Text PDFEffects of the Rht8c, Rht-B1b, Rht-B1e and Rht-D1b genes on the plant height of wheat have been investigated. Variations of these effects are significantly modified by genetic background and year conditions. Complex of the alleles Rht8c Rht-B1a Rht-D1b Ppd-D1a is advantageous for the conditions of the South Ukraine region.
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