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Sacramento, CA, United States

Khan A.A.,University of Agriculture | Iqbal M.,University of Agriculture | Ali Z.,University of Agriculture | Athar M.,288 Meadowview Road
Plant Biosystems | Year: 2010

A complete diallel study of crosses between eight wheat varieties was carried out to determine the relative magnitude of components of genetic variation and heritability for important grain yield, quality and drought-related traits. The data appeared adequate for the additive-dominance model. The additive effects predominated for most traits, and consequently the narrow-sense heritability was high to moderately high for flag leaf area, weight and venation, stomatal frequency and size, epidermal cell size, biomass, protein content, number of tillers, spike length, spike density, 1000-grain weight and grain yield. These results appear promising for selecting better plants in the segregating populations with some degree of improvement for yield, quality and physiological efficiency. © 2010 Società Botanica Italiana. Source

Naveed A.,University of Agriculture at Faisalabad | Khan A.A.,University of Agriculture at Faisalabad | Rauf S.,University of Sargodha | Athar M.,288 Meadowview Road
Journal of Applied Botany and Food Quality | Year: 2010

Drought susceptibility index was used to screen okra germplasm for drought tolerance. On the basis of fresh pod yield and drought susceptibility index, genotypes were divided into four groups. There was a relative shift in the performance of the genotype across the water levels. Arka Anamika showed the highest fresh pod yield under non-stress condition with high drought susceptibility index while Sanam showed lowest drought susceptibility index with highest yield potential under drought stress condition. Physiological and morphological analyses were carried out to study the mechanisms of drought tolerance. The genotypes showed significant interaction with sampling intervals. However for osmotic adjustment, turgor pressure, relative water contents, harvest index and root/shoot ratio, genotypes' performance were relatively stable over sampling intervals. Among the traits, relative water contents allowed the genotypes to separate into drought tolerant and sensitive groups. Therefore selection for high RWC at 30 days after stress may be useful tool for the selection of drought tolerant genotypes. Furthermore, this trait has also shown very high narrow sense heritability, showing its potential for the selection of drought tolerant breeding material. Segregating generations of the cross Arka Anamika x Sanam was used to establish high yielding progenies. Source

Dowell R.V.,288 Meadowview Road
Pan-Pacific Entomologist | Year: 2015

The attraction of non-target insects to the male fruit fly lures methyl eugenol (1,2-Dimethoxy-4-prop-2-en-1-ylbenzene), cue-lure (4-[4-(acetyloxy)pheny1]-2-butanone), and trimedlure (t-Buty1-2-methy1-4-chlorocyclohexanecarboxylate) was examined in the main plant communities in California, except the desert, in 2012 and 2013. A total of 39,166 non-target insects were trapped during the study. Of these, 27 species or morphospecies in five orders and 20 families were deemed as attracted to one of the male lures. The most common of these were in the Syrphidae (Diptera) genera: Platycheirus Le Peletier & Serville, 1828, Melanostoma Schiner, 1860, Meliscaeva Zetterstadt, 1843, Ferdinandea Latreille, 1802, Hadromyia Verrall, 1901, Blera Billberg, 1820, and Melangyna Williston, 1882, as well as the genus Empis Linnaeus, 1758 (Diptera: Empididae) and the genus Orchesia Latreille, 1807 (Coleoptera: Melandryidae). The low capture rate of these non-target insects (<4/day maximum), combined with the discrete nature of the California Department of Food and Agriculture's trapping and fruit fly eradication programs using the lures, indicates that the use of these lures will not have a significant impact on non-target insects attracted to them. Source

Mahmood A.,University of Karachi | Athar M.,288 Meadowview Road | Siddique M.A.,University of Karachi | Mahmood N.,University of Karachi | Naqvi A.R.,University of Karachi
Agriculturae Conspectus Scientificus | Year: 2012

A pot experiment was conducted to determine the effect of sea water salinity on growth, nodulation and nitrogen content of Acacia nilotica (L.) Delile seedlings. Eight weeks old seedlings were irrigated with 40, 50, 60, 70 and 80% sea water for one month. Aft er 12 weeks the plants were uprooted and the nodules were observed for their frequency, shapes and sizes. Nodules showed morphological alterations in size and shape in different salinity levels. The root-shoot ratio, nitrogen contents in the leaf, stem and root were analyzed. In general salt stress resulted in a decrease of plant growth, nodulation and percent tissue nitrogen in A. nilotica plants. Root-shoot ratio showed gradual increase with increasing sea water concentrations. Nitrogen contents decreased in leaf and stem, whereas it increased in roots. Nodules showed morphological alterations in size and shape with increasing salinity. A. nilotica accumulated NaCl in the xylem of the roots that may be considered as a preliminary salt tolerant mechanism adopted by the plant. Source

Nizami S.M.,Pmas Arid Agriculture University | Mirza S.N.,Pmas Arid Agriculture University | Khan I.A.,Pmas Arid Agriculture University | Athar M.,288 Meadowview Road
African Journal of Biotechnology | Year: 2011

Agri-silicultural system is in vogue for livelihood under prevailing biophysical limitations of the environment in northern areas of Pakistan. Therefore, to make the farmers realise the significance of agroforestry system and to analyse its income, agro ecological effect on agroforestry income of farmers a study was carried out in two villages of two different agro ecological zones of northern areas in Pakistan; Jalalabad and Bagrot valley. A total number of 120 households were randomly selected for survey and data collection. The study revealed that there was significant difference in agro forestry income in the two agro ecological zones. The double cropping zone has more agro forestry income when compared with the single cropping zone. The agro forestry income and cultivated land had linear relationship such that with the increase of farm size, agro forestry income increased. It was observed that, agro forestry increased the production of tree components on farmland and minimised the dependency on natural forest for firewood and timber. © 2011 Academic Journals. Source

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