PJB-2023-368
STUDY ON RESISTANCE MECHANISM OF WHEAT (TRITICUM AESTIVUM L.) GENOTYPES AGAINST BIRD CHERRY OAT APHID (RHOPALOSIPHUM PADI), HEMIPTERA: APHIDADAE
ASAD KHAN
Abstract
The study on categories of resistance in selected wheat genotypes against wheat aphid (Rhopalosiphum padi) was conducted in the field as well as under laboratory conditions at Agriculture Research Institute (ARI) Tarnab, Peshawar, Pakistan during, 2021-2022. During this study, a total of four different experiments were carried out where the initial population trend of aphid was studied to observe the initial appearance, peak position and departure of aphid from the field on selected wheat advanced lines. The lines used in Population Trend the same advanced lines were exposed for antixenosis experiment. In tested wheat lines, only advanced line ‘TRB-14-116’ proved as antixenosis resistant against the aphid compared to the tested wheat lines and ‘TRB-02-138’ proved susceptible compared to tested wheat lines. The third experiment trial was conducted to find out the tolerance characteristics of the selected advanced lines against R. padi based on proportional plant dry weight change (DWT) and tolerance index (TI). During tolerance study of selected wheat advanced lines against aphid, ‘TRB-32-123’ and ‘TRB-14-116’ proved reasonable tolerance characteristics based on more number of aphids produced as compared to ‘TRB-32-123’ and ‘TRB-14-116’ showed vigor against wheat aphid and no symptoms of damages were observed. The forth experiment was conducted for grain yield and its components against (R. padi). The aphid density was recorded significantly greater on ‘TRB-02-138’ (8.14 aphid plant-1) and lower on advanced line ‘TRB-14-116’ (1.25 aphid plant-1). The reaction of the tested advanced lines was significantly different against R. padi as compared to susceptible advanced line. The average yield of control plants was maximum (4324 kg/ha) in ‘TRB-32-123’ as compared to ‘TRB-02-138’ (3901 kg/ha). The biological yield of ‘TRB-32-123’ (12601 kg/ha) was maximum and the advanced line ‘TRB-02-138’ (11701 kg/ha) yield significantly higher as compared to ‘TRB-02-138’ (11701 kg/ha). The 1000 grain weight of TRB-32-123 (44.0 g/ha) per line was maximum and lower in advanced line ‘TRB-02-138’ (35.0 g/ha).
Key words: Wheat Advanced Line, Wheat Aphid, Antixenosis Test, Tolerance Test, Yield Components.
To Cite this article:
Download
