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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Koka, K.;
Zeng, L.;
Baird, W. V. |
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| Author Affiliation: | Clemson University, Clemson, SC |
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| Title: | Genetic analysis of dinitroaniline herbicide resistance: Inheritance of oryzalin tolerance in the "intermediately resistant" biotype of goosegrass |
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| Section: | Papers and Abstracts Presented
Other records with the "Papers and Abstracts Presented" Section
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| Meeting Info.: | 49th Annual Meeting, Charlotte, NC, January 15-17, 1996 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 49, 1996, p. 153. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Goosegrass is considered one of the most troublesome weeds in the world. Dinitroaniline herbicide (DNH) resistance in goosegrass is a serious problem, compromising effective control of this weed. There are two distinct DNH tolerant biotypes in goosegrass, a highly resistant (R-) and an intermediately resistant (I-) biotype. These two resistant phenotypes are defined based upon the plants growth and response to specific DNH application rates. The inheritance of DNH tolerance in the intermediately resistant (I-) biotype is unknown. Crosses between the I- biotype and the susceptible (S) biotype or R- biotype were made to understand the inheritance of the herbicide response phenotypes of F1 plants and their progenies. The F1 hypbrids were identified using isozyme markers. The herbicide response phenotype of the F1 plants and F2 seedlings were determined using two root growth bioassays, one for mature plants and another for germinating seeds. The DNH phenotype of F1 plants of S X I was identical to that of the S parental biotype. Similarly the DNH phenotype of the (I X R) F1 plants was identical to the I parental biotype. The F2 progeny from (S X I) F1 segregated S and I parental phenotypes, and the F2 progeny from (I X R) F1 segregated for both the I and R phenotypes. The observed phenotype segregation fit an expected ratio of 3:1 (i.e., S:I and I:R). These findings are consistent with (i) the I- phenotype being controlled by a single nuclear gene and (ii) the I- allele being recessive to the S- allele and dominant to the R- allele. The biochemical and molecular basis for the intermediately resistant phenotype needs to be investigated." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Koka, K., L. Zeng, and W. V. Baird. 1996. Genetic analysis of dinitroaniline herbicide resistance: Inheritance of oryzalin tolerance in the "intermediately resistant" biotype of goosegrass. South. Weed Sci. Soc. Proc. 49:p. 153. |
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MSU catalog number: SB 611 .S6 |
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