Five early growth characters were examined in six races of Arabidopsis thaliana (L.) Heynh, their reciprocal F(1) hybrids (1974) and F(1) by tester hybrids, using a seventh race as a paternal tester. Three of the five characters were also examined at two nutrient levels in reciprocal F(1) hybrids (1972) of all seven races. Analyses of F(1) and F(1) by tester hybrids revealed significant materna...

The diploid Mexican species S. bulbocastanum (blb) was used as a source of late blight resistance in somatic hybridization with the potato (S. tuberosum, tbr) dihaploid H-8105. The produced 2x blb (+) 2x tbr H-8105 somatic hybrids did not retain the blb parent's characteristic high resistance to P. infestans. The revealed aneuploidy of blb (+) tbr H-8105 hybrids indicated a possible loss of ind...

The genetic basis of hybrid vigor or heterosis has been debated for more than a century. A popular hypothesis to explain this phenomenon is that there are different slightly deleterious recessive homozygous alleles in the two parents and that these alleles are complemented in the hybrid so that the biomass and fertility exceed both parents. To address the complementation hypothesis in a direct ...

The studies on the correlation of the traits and their relative direct and indirect effects on yield are important, as they are helpful to adopt suitable selection procedure for yield improvement in inter-racial breeding programmes. In the present study, 15 wide compatible genotypes (11 tropical japonicas and four indicas) were crossed with six non-wide compatible genotypes (three each of indic...

Photosensitization properties of coronene-purine (Cor-P) hybrids for photodynamic therapy (PDT) have been investigated in this work. Eight hybrid Cor-P models have been designed by the additional of adenine (A) and guanine (G) nucleobase to Cor species. The evaluated absorption and emission energies indicated that the singular models are not good at all for PDT process whereas their hybrid mode...

Leaves of 13 interspecific and intergeneric citrus somatic allotetraploid hybrids were analysed and compared with those of their respective parents (lime, lemons, citron, orange, kumquat, poncirus and mandarin) with regards to their sesquiterpenoid contents (μg/g dry weight). The hybrids do not fully retain their parental traits. Sesquiterpenoid production is much reduced (by ~65–90%) in hybrid...

1. The main aim of the present review is to raise awareness of the molecular complexity of single skeletal muscle fibres from "normal" and "transforming" muscles, in recognition of the many types of hybrids that have been observed in vertebrate skeletal muscle. The data used to illustrate various points made in the review were taken from studies on mammalian (mostly rat) and amphibian muscles. ...

Interspecific hybridization in Tecoma Juss. was conducted to develop novel forms for the nursery industry. We report fertile hybrids from the cross T. garrocha Hieron. (pistillate parent) × T. stans (L.) Juss. ex Kunth. Leaf morphology of the F(1) hybrids of T. garrocha × T. stans was intermediate between the parents. GISH also confirmed hybridity. The F(1) hybrids were successfully backcross...

Interspecific hybrids of Pleurotus florida PF-5 (MTCC 1801) and Pleurotus sajor-caju PSC3 (ATCC 62887) were developed using electrofusion. A concentration of 2mM vanillin and 1000ppm carbendazim were selected as screening markers for the hybrids of the two Pleurotus spp. The electrofusion using an exponential decay was best with 1000 V (2 pulses with an interval of 5 sec). With square wave disc...