摘要
水稻抽穗期是重要的农艺性状。随着水稻基因组学和分子遗传学研究的快速发展,水稻抽穗期的遗传学研究近年来取得了较大进展。在水稻抽穗期QTLs研究方面,目前已经定位了536个QTLs,抽穗期QTL的发现与材料、群体类型及环境均有关,在抽穗期遗传中上位性及QTL与环境互作同样具有重要作用;在基因克隆方面,有5个与水稻抽穗期有关的基因已被克隆,其中4个与长日植物拟南芥开花相关基因之间具有保守性;在水稻抽穗期信号传导路径研究方面,拟南芥的相关研究结果为水稻提供了很好的借鉴,研究发现水稻中存在与拟南芥类似的生物钟和光周期调控抽穗期的模式,并且水稻中生物钟调控抽穗期的路径有多条。植物成花分子遗传学研究主要集中在光周期及春化作用上,关于感温性的遗传研究很少。
Heading date (HD) is an important agronomy trait in rice. With the rapid development of genomics and molecular genetics in rice, a great progress has been made in the studies on genetic basis of HD in rice in recent years. Up to now, 536 QTLs for HD in rice have been reported. QTLs detection is not only dependent on materials, populations, but also dependent on environments. Besides QTL, epistasis and QTL×environment also play important roles in the genetic control of HD in rice. By far, five HD genes have been cloned, and four of them are conserved between Arabidopsis and rice. Studies on signal transduction pathway of HD in Arabidopsis are very helpful to conduct the similar research in rice. The model controlling HD in rice is similar to the ones in Arabidopsis, which circadian clock together with photoperiod control HD; and several circadian clock related pathways have been found in rice recently. Molecular genetic studies on HD have been mainly focusing on photoperiod and vernalization, very few studies have involved thermosensory.
出处
《分子植物育种》
CAS
CSCD
2005年第2期222-228,共7页
Molecular Plant Breeding
