Inheritance of resistance to the pea aphid in alfalfa hybrids
AuthorsL. G. Jones
Fred N. Briggs
R. A. Blanchard
Authors AffiliationsL. G. Jones was Formerly Entomologist, United States Bureau of Entomology and Plant Quarantine, Agricultural Research Administration; Fred N. Briggs was Professor of Agronomy, University of California, and Agronomist in the California Agricultural Experiment Station; R. A. Blanchard was Entomologist, United States Bureau of Entomology and Plant Quarantine, Agricultural Research Administration.
Hilgardia 20(2):9-17. DOI:10.3733/hilg.v20n02p009. June 1950.
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The pea aphid has caused varying amounts of damage in alfalfa fields, the damage often being severe in the Antelope Valley of California.
A number of undamaged alfalfa plants collected in this region proved to be heterozygous for resistance. A homozygous resistant plant derived from one of these was crossed with a susceptible plant, and the inheritance of resistance was studied in the F2 and F3 generations.
Resistance resulted from a dominant and a recessive gene. They were linked, with a crossover value of 28 per cent indicated.
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