Journal of Plant Biochemistry and Biotechnology
  • Year: 2005
  • Volume: 14
  • Issue: 2

Isoproturon Resistance in Phalaris minor : Study of Physio-biochemical Parameters in Isoproturon Susceptible and Resistant Biotypes and Their Hybrids

  • Author:
  • Dilipkumar Kachare, AK Gaur, Sanjeev Agrawal, RS Verma, DP Mishra
  • Total Page Count: 4
  • Page Number: 219 to 222

Department of Biochemistry, College of Basic Sciences and Humanities, G.B. Pant University of Agriculture and Technology, Pantnagar 263 145 (Uttaranchal), India

*Corresponding author

Abbreviations: DAS, days after sowing; IRGA, Intra Red Gas Analyzer; PAR, photosynthetically active radiations; R, isoproturon resistant; S, isoproturon susceptible.

Abstract

An experiment was conducted to study physio-biochemical parameters to delineate the molecular basis of resistance against isoproturon in Phalaris minor. The reciprocal crosses of isoproturon resistant and susceptible biotypes of P. minor were made during the first year of an experiment and during the next year, these F1 hybrids with their respective parents were evaluated for physio-biochemical and growth parameters after spraying the weed @ 0.0, 0.5, 1.0 and 1.5 kg ha–1 with isoproturon at 22nd and 30th DAS. The F1s showed heterosis and the order of resistance against isoproturon in the four biotypes was R×S > R > S×R > S. This indicated that the resistance against isoproturon in P. minor is predominantly governed by cytoplasmic inheritance, but the nuclear inheritance also has some contribution.

Keywords

Phalaris minor, isoproturon resistance, reciprocal hybrids