YANGZHOU, CHINA
Jiangsu Agricultural College
Character and inheritance of a new Y-type
cytoplasmic male-sterile line
--Tai-chen Qin and De-xiang Dun
It is a useful approach to create new types
of male-sterile lines by means of combining sterile cytoplasms of restorer
lines with maintainer nuclear backgrounds. In this way, we have bred YII
types of male-sterile lines. Research on their resistant reactions against
HmT, fertility restoration patterns, hereditary traits, light microscopy,
electron microscopic ultrastructure and biochemical character has been
conducted rather systematically for several years. According to the results,
the Y-type sterile line was roughly considered as a new one in maize and
different from C, T and S groups. However, a further testing is needed
before it can be accurately assigned to a group. The Y-type sterile line
has shown some favorable characters, such as the stable inheritance of
pollen abortion, readily being applied in hybrid production, possessing
many restorer lines in multitudinous inbred lines and strong resistance
against HmT and so on. It is regarded as a valuable germplasm source and
has important application value in seed production.
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