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The heterosis of F1 from combining with some homokaryon -alloplasmic sterile lines named KVV 41,KVFuyiA, WAV41A and WAFuyiA were tested and the endogenous hormones of KVV41A, WAV41A and V41Bwere determined. The heterosis of combinations with KV cytoplasm was higher than that with WA cytoplasm,showing significantly positive effects. The contents of IAA and GA1+3+4+7 in sterile line KVV41A, WAV41A wereobviously lower than that in restorer line V41B during panicle initiation stage, the loss of hormones in WA typewas earlier than in KV type and the hormone contents of KV sterile line were more than that of WA sterile line. Itsuggested that KV cytoplasm effected differently from WA cytoplasm on rice hybrids.
The heterosis of F1 from combining with some homokaryon-alloplasmic sterile lines named KVV 41, KVFuyiA, WAV41A and WAFuyiA were tested and the endogenous hormones of KVV41A, WAV41A and V41Bwere determined. The heterosis of combinations with KV cytoplasm was higher than that with WA cytoplasm , showing significant positive effects. The contents of IAA and GA1 + 3 + 4 + 7 in sterile line KVV41A, WAV41A wereobviously lower than that in restorer line V41B during panicle initiation stage, the loss of hormones in WA typewas earlier than in KV type and the hormone contents of KV sterile line were more than that of WA sterile line. Its designed that KV cytoplasm makers differently from WA cytoplasm on rice hybrids.