interspecific or intergenus hybridization in sugarbeet (b. vulgaris l.) is usually failed due to non fertilization, embryo death or absence of connection between embryo and endosperm. consequently invitro embryo rescue technique is of value to save hybrid embryos before annihilation. sugar beet inter-specific crosses with wild species is impossible in classical breeding because of no chromosoma...

Polyethylene glycol (PEG) is effective as a fusing agent for the rescue of virus from Rous sarcoma virus-transformed mammalian cells. The procedure of PEG-mediated rescue of virus from virogenic cell lines is described, and the technique is compared with that of Sendai virus-mediated rescue. Virus may be rescued quantitatively from virogenic cell lines by plating mitomycin C-killed transformed ...

Auxinic herbicides (e.g. dicamba) are extensively used in agriculture to selectively control broadleaf weeds. Although cultivated species of Brassicaceae (e.g. Canola) are susceptible to auxinic herbicides, some biotypes of Sinapis arvensis (wild mustard) were found dicamba resistant in Canada. In this research, dicamba tolerance from wild mustard was introgressed into canola through embryo res...

Variability in the cultivated germplasm for economic traits such as resistance to rice tungro virus, sheathblight, yellow stem borer, drought and salt tolerance is limited. This necessitated search for the genes in secondary and tertiary gene pool of genus Oryza. Fortunately, wild species are an important reservoir ofuseful genes for resistance to major disease, pest and tolerance t...

A cytoplasmic component(s), previously shown to rescue the 'blocked' 2-cell mouse embryo in vitro, has been demonstrated to peak in activity during the transition between G2 and M phase and decline thereafter. The possible significance of this component(s) in the regulation of cleavage of the cultured mouse embryo is discussed.

Hybrids as various resources have valuable importance in tree breeding. Today, improvement programs by using poplar and willows and their hybrids play basic role in supplying wood and decreasing pressure on natural forests. This research was carried out in order to study inter-generic hybridization possibility between Salix aegyptica and Populus caspica species from Salicaceae to achieve new hy...

The experiments described here were designed to reveal the distribution in the frog early embryo of components which are sufficient for specification of the dorsal structures of the embryonic body axis. The approach was to allow cleavage planes to divide the embryo into various well-defined regions and to transplant cells from each region into recipient embryos which would otherwise fail to for...