| a new gene for resistance to dysaphis pyri in pear and identification of flanking microsatellite markers. | dysaphis pyri is an important aphid pest of european pear (pyrus communis) cultivars, none of which are currently reported to be resistant. in this study, we produced a progeny of the european pear comice crossed with an accession of snow pear (pyrus nivalis) that segregated for resistance to d. pyri in a mendelian fashion, indicating the presence of a major gene, dp-1. following screening of the parents and seedlings with microsatellite markers, cosegregation analysis indicated that dp-1 is fla ... | 2008 | 19088815 |
| population growth of dysaphis pyri (hemiptera: aphididae) on different pear cultivars with discussion on curve fitting in life table studies. | population growth parameters of the dysaphis pyri (boyer de fonscolombe) (hemiptera: aphididae) were evaluated on four different cultivars (coscia, ankara, williams, and santa-maria) of pear (pyrus communis l.) under field conditions in the van region of turkey. aphids were kept on leaves of 10-yr-old pear trees in plexiglas clip-cells (20 mm in diameter and 10 mm in height, with the upper side covered with muslin). for the description of the stage differentiation during population growth, we an ... | 2017 | 28854662 |