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Science 31 March 1989:
Vol. 243. no. 4899, pp. 1725 - 1728
DOI: 10.1126/science.243.4899.1725
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Articles

Restriction Fragment Length Polymorphisms Associated with Water Use Efficiency in Tomato

BJORN MARTIN 1, JAMES NIENHUIS 1, GRETCHEN KING 1, and ALISON SCHAEFER 1

1 Native Plants, Inc., 417 Wakara Way, Salt Lake City, UT 84108.

Improvement of crop water use efficiency (WUE) has not been successful because evaluation for this component of drought resistance is unreliable in field-grown plants. The composition of stable isotopes of plant carbon (dgr13C) was earlier shown to be an excellent indicator of WUE in tomato and other species. It is now reported that dgr13C can be satisfactorily predicted from three restriction fragment length polymorphisms (RFLPs), which are genetic markers for discrete DNA sequences within the genome. An additive type of gene action was observed for all three RFLP markers, and for one of them there also was a significant nonadditive component. Combining the dgr13C and RFLP technologies may aid in identifying genes associated with WUE and in studying mechanisms contributing to WUE. These technologies will also be useful for crop improvement.

Submitted on September 19, 1988
Accepted on December 28, 1988


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