5个新育成粳型光温敏核不育系开花及异交性能的研究  

Studies on Flowering Habits of 5 Newly-developed Japonica Photoperiod Thermo-sensitive Genic Male Sterile Lines

作　　者：贺晓鹏[1] 杨书化[1] 田亚雯[1] 李雪林[2] 

机构地区：[1]华中农业大学植物科学技术学院 [2]河南科技大学,洛阳471003

出　　处：《中国农学通报》2004年第4期104-107,共4页Chinese Agricultural Science Bulletin

基　　金：湖北省"十五"科技攻关项目(2001AA204A01)

摘　　要：以5个新育成的粳型光温敏核不育系为材料,对其开花习性及异交性能进行了研究。结果表明:Y27S的单穗和单株开花历期最短,118S和对照N5088S相近,B30S、116S、117S相对较长。Y27S、116S、118S、117S单穗日开花动态与恢复系41678接近,B30S落后于41678,对照N5088S早于41678。Y27S、B30S和对照N5088S与恢复系41678的花时分布动态较接近;116S虽花时分散,但开花较早,午前花率较高;117S花时集中但开花较晚,118S花时分散且高峰偏迟。张颖时间以116S和118S最长,117S最短。柱头外露率以118S最高,116S最低;118S、B30S和117S柱头外露率都在60%以上。Y27S柱头活力保持时间最长,对照N5088S柱头活力下降最慢。参试不育系包颈率都较高,而闭颖率相对较低。The flowering habits and outcrossing characteristics of 5 newly-developed japonica photoperiod/ thermo-sensitive genic male sterile lines were studied. Results showed: The flowering duration of single plant and single panicle of Y27S is the shortest, the one of similar 118S is to control N5088S, B30S, 116S and 117S which are comparatively longer. Flowering kinesis of every day in a panicle of Y27S, 116S, 118S and 117S are similar to that of restorer line 41678, but B30S lag is behind 41678,while control N5088S is earlier than it. Flowering kinesis in one day in a panicle of Y27S, B30S and control N5088S are similar to that of 41678. Although the anthesis time of 116S is dispersed, its flowering is earlier and forenoon flowering rate is relatively higher. The anthesis time of 117S is concentrated and the flourishing flowering is late, while ones of 118S is dispersed and late. Spikelet opening time of 116S and 118S is the longest, but 117S is relatively short. As for the stigma exsertion rate, 118S is the highest, 116S is the lowest, and that of 118S, B30S and 117S are more than 60%. The duration the stigma vitality of Y27S is the longest. The fall of the stigma vitality of control N5088S is the slowest.All the P(T)GMS have higher wrapround spikelet rates and relatively lower indehiscent spikelet rates.

关 键 词：粳稻 光温敏核不育系 开花习性 异交性能 

分 类 号：S511.22[农业科学—作物学]