Inheritance of herbicide resistance in two germplasm lines of Clearfield rice (Oryza sativa L.)

Inheritance of imidazolinone resistance in two germplasms of Clearfield rice lines, 93AS3510 and PWC-16, was studied using parents, F 1 hybrids, F 2 populations , and F 2:3 families. Germination tests were conducted in Petri dishes under controlled environments to reveal any discrete phenotypic resp...

Full description

Saved in:
Bibliographic Details
Published in:Canadian journal of plant science 2007-07, Vol.87 (3), p.659-669
Main Authors: Wenefrida, I, Utomo, H.S, Meche, M.M, Nash, J.L
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
chemical concentration
Chemical control
Fundamental and applied biological sciences. Psychology
genes
genetic resistance
Genetics of eukaryotes. Biological and molecular evolution
herbicide resistance
heritability
imidazolinone herbicides
incomplete dominance
microsatellite repeats
Oryza sativa
Parasitic plants. Weeds
Phytopathology. Animal pests. Plant and forest protection
red rice
seedling growth
Weeds
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Inheritance of imidazolinone resistance in two germplasms of Clearfield rice lines, 93AS3510 and PWC-16, was studied using parents, F 1 hybrids, F 2 populations , and F 2:3 families. Germination tests were conducted in Petri dishes under controlled environments to reveal any discrete phenotypic responses to herbicide treatments. PWC-16 has a herbicide resistance level 4.9 times higher than that of 93AS3510. A concentration of 1 mg L -1 a.i. (active ingredient) of imazethapyr herbicide produced three distinctive response types in 93AS3510 crosses, while a concentration of 10 mg L -1 was required to differentiate the three response types in PWC-16 crosses. The segregation of the herbicide-resistant gene from both Clearfield rice lines fit into the Mendelian 1:2:1 (susceptible:intermediate:resistant) ratio. There was no maternal effect associated with the inheritance of the trait. The imidazolinone resistance, therefore, is governed by a single incomplete dominant nuclear gene. The F 1 hybrid from a cross between resistant and non-resistant lines will produce resistant plants. Clearfield rice provides an effective use of imidazolinone herbicides to control red rice, the most troublesome weed of rice, along with other rice weeds. Preventing transfer of the herbicide-resistant gene into red rice is crucial to maintain its effectiveness. Key words: Rice, Oryza sativa, imazethapyr, herbicide resistance, imidazolinone, incomplete dominance, heritability
ISSN:0008-4220
1918-1833
DOI:10.4141/P05-086