不同收获期对杂交水稻F_(1)代种子质量的影响

Effect of different harvest periods on the quality of F_(1) hybrid rice seeds

为探究杂交水稻F_(1)代不同收获期对种子质量的影响,选择3个杂交水稻制种组合,分别是晶4155S/R534、荃9311A/五山丝苗和隆臻36S/钰占作为试验材料,在喷施赤霉素后设置8个不同收获期,研究不同收获时间对杂交水稻F_(1)代种子质量的影响,考察相关农艺性状。结果表明,晶4155S/R534在喷施赤霉素后33 d左右种子综合质量较好,适宜收获;荃9311A/五山丝苗,在喷施赤霉素后30 d左右种子综合质量较好,适宜收获;而隆臻36S/钰占在喷施九二〇后35 d左右适宜收获。因此,选择适宜的收割时期可显著提高杂交水稻种子发芽率和发芽势,增加千粒重,降低种子粉质化程度和裂颖率,提升杂交水稻种子质量,确保杂交水稻产量稳收。

In order to investigate the effect of different harvest periods on seed quality of hybrid rice F_(1) generation,this study selected three hybrid rice seed production combinations,namely Jing 4155S/R534,Quan 9311A/Wushansimiao,and Longzhen 36S/Yuzhan,as experimental materials.After spraying gibberellin,8 different harvest periods were set to study the effect of different harvest times on the seed quality of hybrid rice F_(1) generation.By examining relevant agronomic traits,the results showed that Jing 4155S/R534 has good comprehensive seed quality and is suitable for harvesting around 33 days after spraying gibberellin;Quan 9311A/Wushansimiao seedlings have good comprehensive seed quality and are suitable for harvesting around 30 days after spraying gibberellin;Longzhen 36S/Yuzhan is suitable for harvesting around 35 days after spraying Jiuerling.Therefore,selecting an appropriate harvesting period can significantly improve the germination rate and vigor of hybrid rice seeds,increase thousand grain weight,reduce the degree of seed powdering and glume cracking,improve the quality of hybrid rice seeds,and ensure stable yield of hybrid rice.