Inheritance of resistance to the pea aphid in alfalfa hybrids

Jones, L; Briggs, F; Blanchard, R

Inheritance of resistance to the pea aphid in alfalfa hybrids

Authors

L. G. Jones
Fred N. Briggs
R. A. Blanchard

Authors Affiliations

L. 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.

Publication Information

Hilgardia 20(2):9-17. DOI:10.3733/hilg.v20n02p009. June 1950.

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Abstract

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.

Literature Cited

Bigger John H. Insect resistance in corn. Amer. Soc. Agron. Jour. 1943. 35:689-94.

Blanchard Ralph A. Insect resistance in forage plants. Amer. Soc. Agron. Jour. 1943. 35:716-24.

Blanchard Ralph A., Dudley John E. Alfalfa plants resistant to the pea aphid. Jour. Econ. Ent. 1934. 27:262-64.

Dahms R. G. Insect resistance in sorghum and cotton. Amer. Soc. Agron. Jour. 1943. 35:704-15. DOI: 10.2134/agronj1943.00021962003500080007x [CrossRef]

Jones Elmer T. Insect resistance in wheat. Amer. Soc. Agron. Jour. 1943. 35:695-703.

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