The effect of genotype-temperature interactions on body weight has been studied in a natural population of Drosophila melanogaster using four isogenic strains derived from it, and their hybrid F(1) and F(2) progenies. Measurements were made at four constant temperatures-25 degrees , 21 degrees , 17 degrees and 13 degrees C-and at a temperature oscillating between 17 degrees and 25 degrees C.-Lo...

Abstract: Test cross population of Deli dura parents namely; NIFOR ex UP Malaya, NIFOR ex Serdang Avenue, Ulu Remis Deli ex Sabah, NIFOR ex Serdang Avenue x La Me and Equador Deli were evaluated for bunch yield and fruit quality characters in rainforest ecology of Nigeria. The objective of the experiment is to select new Deli dura parents for inclusion in the next cycle of NIFOR oil palm breedi...

We evaluated the potential of the best linear unbiased predictor (BLUP) along with the relationship coefficient for predicting the performance of untested maize single-cross hybrids. Ninety S(0:2) progenies arising from three single-cross hybrids were used. The 90 progenies were genotyped with 25 microsatellite markers, with nine markers linked to quantitative trait loci for grain yield. Based ...

Endopeptidase allele Ep-D1c and DNA marker-assisted selection have been used for the incorporation of Lr19 + Lr24 leaf rust resistance genes combination into adapted commercial winter wheat cultivars. The first step was the transfer of the gene Lr19 from the donor cultivar Agrus into acceptor cultivars Simona and Lívia. The progenies possessing the null allele Ep-D1c linked to the gene Lr19 hav...

Pre-selection for fruit skin color at the seedling stage would be highly advantageous, with marker-assisted selection offering a potential method for apple pre-selection. A and MdMYB1 alleles are allele-specific DNA markers that are potentially associated with apple skin color, and co-segregate with the Rf and Rni loci, respectively. Here, we assessed the potential application of these 2 allele...

A reciprocal chromosomal transposition was identified in several annual oilseed Brassica napus genotypes used as parents in crosses to biennial genotypes for genetic mapping studies. The transposition involved an exchange of interstitial homeologous regions on linkage groups N7 and N16, and its detection was made possible by the use of segregating populations of doubled haploid lines and codomi...

in the present work we studied the birth order in progenies of lranian survivors of iraqi chemical attacks during a period from 1984 to 1989. then we compared the results with the birth order of the control group. despite a slight difference between the birth order in the two groups of progenies, this was not statistically significant. this does not mean, however, that there are no genetic cons...

Levels, genetic traits and stability of resistance to Bacillus thuringiensis of the Bang Bua Tong (BS) population of the diamondback moth Plutella xylostella collected in Thailand were investigated. The BS population exhibited 668 and 66.5-fold resistance to formulations derived from B. thuringiensis subsp. kurstaki (Toarow CT®), and B. thuringiensis subsp. aizawai (XenTari®), respectively. In ...

A differential outcome results from rapid middle cerebral artery (MCA) occlusion in young normotensive Wistar (NW) rats as compared to the spontaneously hypertensive stroke-prone (SHRSP) rat. The SHRSP invariably infarcts; the NW usually does not. To determine if segregation at a single autosomal locus explains the difference between strains, a NW male was crossed with several SHRSP females to ...

The genetic variability of Scots pine was investigated in six populations from Poland representing two maternal populations and their natural and artificial progenies. Thirteen enzyme systems controlled by 2 allozyme loci were analyzed using starch gel electrophoresis. Progeny populations maintained a high and similar level of genetic variation to that observed in the maternal populations. As e...