Abstract: The heterosis of F₁ from combining with some homokaryon-alloplasmic sterile lines named KVV 41, KV Fuyi A, WAV41A and WA Fuyi A were tested and the endogenous hormones of KVV41A, WAV41A and V41B were determined. The heterosis of combinations with KV cytoplasm was higher than that with WA cytoplasm, showing significantly positive effects. The contents of IAA and GA_1+3+4+7 in sterile line KVV41A, WAV41A were obviously lower than that in restorer line V41B during panicle initiation stage, the loss of hormones in WA type was earlier than in KV type and the hormone contents of KV sterile line were more than that of WA sterile line. It suggested that KV cytoplasm effected differently from WA cytoplasm on rice hybrids.

Key words: cytoplasmic effect, heterosis, homokaryon-alloplasm, sterile line

摘要： 为了探索KV胞质的利用价值，用KVV41A、WAV41A、KV福伊A、WA福伊A与不同类型的恢复系配制18对组合，其F₁的六个农艺性状结果表明,两种不同胞质组合的农艺性状有明显差异，除个别组合少数性状外，总的趋势是KV型组合优于WA型组合。在相同细胞核遗传背景条件下，KV型胞质组合的杂种优势大于WA型胞质组合的杂种优势，这种效应是受细胞质支配的。通过内源激素检测进一步探明：KVV41A、WAV41A和V41B中的内源素IAA、GA_1+3+4+7含量有明显差异。V41B两种内源激素总含量最高，其次是KV型，最低的是WA型。V41B在整个幼穗发育过程中两种内源激素含量也是始终高于WAV41A和KVV41A，不育系的含量都较低，这可能是引起雄性不育的内因之一。而KVV41A中两种内源激素总含量和幼穗发育多数时段的含量介于WAV41A与V41B之间，可能是 KVV41A较WAV41A更容易被恢复的原因之一。

关键词: 同核异质体, 不育系, 杂种优势, 胞质效应