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本文研究了按４×４不完全双列杂交估算籼型杂交稻碾米品质配合力在５个播期的表现，结果表明：不育系的糙米率、精米率及恢复系的整精米率ＧＣＡ（一般配合力）×播期工作显著，精米率和整精米率ＳＣＡ（特殊配合力）×播期互作也显著。碾米品质配合力的稳定性中等偏低。糙米率和整精米率配合力的稳定性主要受加性基因与播期互作的影响，而精米率配合力的稳定性同时受加性和非加性基因与播期互作的影响。
In this paper, we evaluated the performance of combining ability of rice grain quality in 5 sowing date by 4 × 4 incomplete diallens. The results showed that the brown rice rate, milled rice rate and the milled rice rate GCA (General combining ability) × sowing date was significant, milled rice rate and milled rice rate SCA (special combining ability) × sowing date was also significant. The stability of milling ability of rice milling is medium and low. The stability of the combining ability of brown rice rate and head milled rice rate is mainly affected by the interaction between additive gene and sowing date, while the stability of combining ability of milled rice rate is affected by the interaction between additive and non-additive genes and sowing date.