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Accession Number:
AD0835276
Title:
PRODUCTION OF SEEDS OF F1 HYBRIDS OF TOBACCO (NICOTIANA TABACUM L.) RESISTANT TO TOBACCO DOWNY MILDEW (PERONOSPORA TABACINA ADAM)
Corporate Author:
ARMY BIOLOGICAL LABS FREDERICK MD
Report Date:
1964-12-22
Abstract:
For a number of years, many tobacco-producing countries have been pursuing studies on a large scale concerning the production value of F1 variations of tobacco hybrids. Certain hybrids show clearly a heterozygous effect under certain conditions. As a result of catastrophic spreading of tobacco downy mildew Peronospora tabacina Adam in Europe, many countries started to cultivate varieties of tobacco which resist the disease. However, it takes a number of years 6-8 to obtain results of the cultivation, and the problem is particularly difficult because it is possible to obtain varieties which resist the tobacco downy mildew only by crossbreeding. These difficulties led tobacco growers to study the possibility of using for the cultivation of the first generation of F1 hybrids to local varieties together with varieties which resist the tobacco downy mildew.
Supplementary Note:
Trans. of Postepy Nauk Rolniczych (Poland) v86 n2 p93-98, 1964.
Pages:
0009
Distribution Statement:
Approved for public release; distribution is unlimited.
File Size:
0.38MB
