[A study on breeding of "Ganzaoxian 47" from dry seeds of rice carried by recoverable satellite].
OBJECTIVE
To observe and investigate the variation and heredity of the offspring of dry seeds of rice carried by satellite, hence to select early maturing mutants, and to cultivate directly "Ganzaoxian 47" new varieties for production application. Isozymes analyses and studies of the new varieties and its original CK varieties were made.


METHODS
Dry seeds of rice restorer line were carried to the space on board a recoverable satellite for 7 d in 1992. After recovery the seeds were planted in the field to study the agricultural characters, yield, disease resistance, rice quality and peroxidase isozymes change.


RESULTS
Its agricultural characters, yield, disease resistance, rice quality and peroxidase isozymes all showed distinct changes, and new varieties were cultivate directively for production application.


CONCLUSIONS
It could be considered that certain variations of the rice seeds induced by the space conditions were heritable to the offspring's, and directive cultivation of new varieties is possible for production application. It could be used as a new method for mutagenic seed breeding.
Li
J G
JG
Institute of Genetics, Academia Sinica, Beijing 100101, China.
Li
Y X
YX
Hua
Y J
YJ
Jiang
X C
XC
D018533:Biomass; D005118:Extraterrestrial Environment; D007527:Isoenzymes / Q000378:metabolism; D009154:Mutation; D012275:Oryza / Q000201:enzymology / Q000235:genetics* / Q000254:growth & development; D010544:Peroxidases / Q000378:metabolism; D012639:Seeds / Q000201:enzymology / Q000235:genetics* / Q000254:growth & development; D013026:Space Flight; D014893:Weightlessness
D007527:Isoenzymes; D010544:Peroxidases