Inbred lines have been developed from the high-yielding varieties 2-19IZR [2-19 Institute of
Plant Protection], 75, 85, 107, Sofia A, Zdanov 8281, VNIIMK1646 [Oil Plants Institute 1646] …

Among lines derived from local varieties, Soviet varieties with a high oil content and forms
from the USA, France, Romania, Argentina and Canada, over 200 lines with good general …

Of 125 direct and reciprocal single crosses obtained without emasculation by artificial
hybridization between S3-S4 inbred lines derived mainly from Russian material, 27 gave …

The failure to produce improved varieties by the earlier work on inbreeding sunflowers [VII,
745] is ascribed to the omission of intercrossing between the lines and the work was …

Varieties of Russian and foreign origin which show good combining ability are listed. For the
development of varieties with high oil content it is considered necessary that both parents …

Several promising hybrids have been bred recently in the USSR, notably MS257, MS353
and M127, which exceed the standard, VNIIMK8931, by 18-30% in seed yield. Also …

Abstract Of 520 F1 interline, variety-line and intervarietal hybrids produced by diallel crosses
between short and tall varieties during 1973-76, the highest yielding were those obtained by …

The principal method of breeding new varieties is by selection from polymorphic
populations. The reserve method is highly effective, especially in increasing oil content (from …

The use of heterosis breeding for improving seed yield is reviewed under the following
headings: breeding of inbred lines; breeding of restorer lines; breeding of lines with high …

Nine parents and 36 hybrids of sunflower genotypes were evaluated for heterosis for 10
characters (days to 50% flowering, plant height, head diameter, stem girth, filled seeds …