不育胞质对水稻杂种种子活力的效应初探

EFFECT OF STERILE CYTOPLASMS ON SEED VIGOR OF HYBRID RICE

利用湛江海洋大学杂交水稻研究室选育的一批同核异质的不育系及其保持系作母本，与优良的恢复系（品种）按不完全双列杂交模式配制不育系杂种（A／R）和保持系杂种（B／R），研究不育质源对杂种种子活力的影响。初步结果表明：不同胞质对杂种种子活力的影响是不同的，是影响杂种种子活力的重要因素。要选育具商活力的水稻“三系”杂交种，新不育质源的选择利用是关键，同时还应注意不育胞质的一般配合力及其与恢复系的特殊配合力。

To study the effect of sterile cytoplasms on seed vigor, five cytoplasm male sterile lines with the same nuclues and their maintainer lines were mated to four restore lines with incomplete diallel cross mode primary result showed that different cytoplasms have different influences over vigor,and suggested that sterile cytoplasms selecting is a key factor in breeding hybrid rice with high seed vigor.