Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-26T05:51:27.969Z Has data issue: false hasContentIssue false
  • English
  • Français

Inheritance of leaf shape and its association with chlorosis in wheat infested by Russian wheat aphid (Diuraphis noxia)

Published online by Cambridge University Press:  24 October 2001

H. R. DORRY  and
M. T. ASSAD
H. R. DORRY
Affiliation:
Department of Agronomy, College of Agriculture, Shiraz University, Shiraz, Iran
M. T. ASSAD
Affiliation:
Department of Agronomy, College of Agriculture, Shiraz University, Shiraz, Iran
Get access Rights & Permissions [Opens in a new window]

Abstract

Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko) has caused significant losses to wheat and barley in many parts of the world. Two RWA resistant lines with flat leaves were crossed with each other and with two RWA susceptible lines producing rolled leaves when infested with RWA. F1, F2 and BC1F1 seedling leaves were classified according to their leaf shape as flat, longitudinally folded, or rolled after artificial infestation. Leaf chlorosis in the phenotypes of F2 plants was also recorded.

The F2 populations of flat×rolled crosses segregated in 9:3:4 (flat:folded:rolled) ratios, suggesting a two dominant gene model for control of leaf shape. Folded leaves appeared only in F2 seedlings. The F1 seedlings of flat×flat cross showed only flat leaves, while the F2 population segregated in a 13:3 (flat:rolled) ratio. Chlorosis ratings and leaf shape scores of F2 seedlings were not independent. F2 seedlings with lower chlorosis scores were more likely to have flat leaves; however, some susceptible F2 seedlings also had flat leaves. Resistant F2 seedlings may have rolled leaves. It was concluded that recording leaf shape is not a reliable visual rating method to evaluate host plant response to RWA, because the inheritance of resistance and leaf shape in wheat are under two different gene systems.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 137 , Issue 2 , September 2001 , pp. 169 - 172
Copyright
2001 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)