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Introgression of phenoxy herbicide resistance from Raphanus raphanistrum into Raphanus sativus
Author(s) -
Jugulam Mithila,
Walsh Michael,
Hall John Christopher
Publication year - 2014
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12168
Subject(s) - raphanus , introgression , mcpa , biology , backcrossing , brassicaceae , hybrid , weed , agronomy , trifluralin , botany , weed control , genetics , gene
Phenoxy herbicides such as 2,4‐dichlorophenoxy acetic acid (2,4‐ D ) and 4‐chloro‐2‐methylphenoxy acetic acid ( MCPA ) are selective herbicides used extensively in agriculture for weed control. Wild radish ( R aphanus raphanistrum) is a problem weed across the globe and heavily infests crop fields in Australia. Phenoxy herbicides are used to selectively control dicot weeds, including wild radish. As a result of selection, phenoxy‐resistant wild radish populations evolved in Western Australia. In this research, introgression of phenoxy resistance from wild radish to cultivated radish ( R aphanus sativus ) was investigated following classical breeding procedures. F 1 progeny were generated by crossing MCPA ‐resistant R . raphanistrum and MCPA ‐susceptible R . sativus . F 1 hybrids were screened for MCPA resistance. The MCPA ‐resistant F 1 hybrids were used to produce three generations of backcross progeny. Genetic analyses of F 1 and backcross progeny demonstrated introgression of the MCPA ‐resistant trait from wild radish to cultivated radish. Implications of phenoxy resistance introgression into cultivated radish include potential development of herbicide‐tolerant radish cultivars or other members of the Brassicaceae family.