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Heredity of Race 1 or Race 2 in Heterodera Avenae

Heredity of Race 1 or Race 2 in Heterodera Avenae HEREDITY OF RACE 1 OR RACE 2 IN HETERODERA AVENAE BY S. ANDERSEN Landbrugets Plantekultur, Copenhagen, Denmark Larvae of race 1 and race 2 of Heterodera avenae have been crossed, and the heredity has been studied in Fi and in F2 progenies. The results can be explained if a theory of two dominant genes is accepted. Previous investigations have shown that a female larva of Heterodera avenae Franklin is able to develop into a cyst. Such parthogenetic cysts are empty. A living cyst, e.g. a cyst with eggs and larvae, develops only after the female larva has been fertilized (Andersen 1961 ) . Two races of H. avenae which are found in Denmark, interbreed, and viable progenies are produced. No morphological differences can be found between the two races, but race 2 produces cysts on the barley variety Drost, whereas race 1 does not. The two races are thus separated by growing Drost barley and a variety which is susceptible to both races. In 1959 and 1961 larvae of race 1 and 2 were crossed. In the following years the reproduction of the segregating progenies was investigated in order to study the heredity of the gene for race http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

Heredity of Race 1 or Race 2 in Heterodera Avenae

Andersen, S.
Nematologica , Volume 11 (1): 121 – Jan 1, 1965
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Publisher
Brill
Copyright
© 1965 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529265X00555
Publisher site
See Article on Publisher Site

Abstract

HEREDITY OF RACE 1 OR RACE 2 IN HETERODERA AVENAE BY S. ANDERSEN Landbrugets Plantekultur, Copenhagen, Denmark Larvae of race 1 and race 2 of Heterodera avenae have been crossed, and the heredity has been studied in Fi and in F2 progenies. The results can be explained if a theory of two dominant genes is accepted. Previous investigations have shown that a female larva of Heterodera avenae Franklin is able to develop into a cyst. Such parthogenetic cysts are empty. A living cyst, e.g. a cyst with eggs and larvae, develops only after the female larva has been fertilized (Andersen 1961 ) . Two races of H. avenae which are found in Denmark, interbreed, and viable progenies are produced. No morphological differences can be found between the two races, but race 2 produces cysts on the barley variety Drost, whereas race 1 does not. The two races are thus separated by growing Drost barley and a variety which is susceptible to both races. In 1959 and 1961 larvae of race 1 and 2 were crossed. In the following years the reproduction of the segregating progenies was investigated in order to study the heredity of the gene for race

Journal

Nematologica – Brill

Published: Jan 1, 1965

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