Interactions between two QTLs for time to anthesis on spike development and fertility in wheat
Interactions between two QTLs for time to anthesis on spike development and fertility in wheat
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小麦穗发育和育性开花时间两个 QTL 之间的相互作用
DOI：
10.1101/2020.11.11.378208
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Basavaraddi P
中科院分区：
文献类型：
--
作者：
Basavaraddi P
据报道，早熟本身（Eps）基因在微调小麦开花时间中是重要的，不依赖于光周期（Ppd）和春化作用（Vrn）。与Ppd和Vrn基因不同，Eps具有相对小的作用，并且它们的生理作用沿着染色体位置没有很好地确定。以春化不敏感品系Paragon和Baj（分别为晚花和早花）杂交的8个株系为材料，研究了田间条件下新发现的两个QTL Eps-7和Eps-2的效应及其互作效应。这两个QTL的影响是轻微的，并受到其他等位基因状态。虽然这些QTL对开花的影响程度相似，Eps-7 D对终末小穗前后的持续时间都有影响，但对终末叶片数（FLN）无影响，而Eps-7 D-early的出叶速度较快，Eps-7 D-early的出叶速度较慢。2 Bac在生殖生长早期表现出更强的特异性，对FLN的影响较小，但不影响叶片的出现率。两个QTL均通过改变小花发育速率和死亡率来影响穗育性。Eps-2B的效应很小，但一致的是，-晚等位基因倾向于产生更多的可育小花。
Earliness per se (Eps) genes are reported to be important in fine-tuning flowering time in wheat independently of photoperiod (Ppd) and vernalisation (Vrn). UnlikePpdandVrngenes,Epshave relatively small effects and their physiological effect along with chromosomal position are not well defined. We evaluated eight lines derived from crossing two vernalisation insensitive lines, Paragon and Baj (late and early flowering respectively), to study the detailed effects of two newly identified QTLs,Eps-7DandEps-2Band their interactions under field conditions. The effect of both QTLs was minor and was affected by the allelic status of the other. While the magnitude of effect of these QTLs on anthesis was similar, they are associated with very different profiles of pre-anthesis development which also depends on their interaction.Eps-7Daffected both duration before and after terminal spikelet while not affecting final leaf number (FLN) soEps-7D-earlyhad a faster rate of leaf appearance.Eps-2Bacted more specifically in the early reproductive phase and slightly altered FLN without affecting the leaf appearance rate. BothQTLsaffected the spike fertility by altering the rate of floret development and mortality. The effect of Eps-2B was very small but consistent in that -lateallele tended to produce more fertile florets.
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影响因子：
7.4
作者：
Ejaz, Mahwish;von Korff, Maria
通讯作者：
von Korff, Maria
小麦 5A 和 5D 染色体缺失系对春化的发育反应
DOI：
--
发表时间：
2003
期刊：
影响因子：
--
作者：
E. Whitechurch;J. Snape
通讯作者：
J. Snape
田间条件下 Ppd 基因影响小麦穗育性的小花萌生/死亡动态
影响因子：
6.9
作者：
P. Prieto;H. Ochagavía;R. Savin;S. Griffiths;G. Slafer
通讯作者：
G. Slafer
小麦中 Ppd 等位基因的对比：不同阶段对光周期敏感性的影响
DOI：
--
发表时间：
2002
期刊：
影响因子：
--
作者：
E. Whitechurch;G. Slafer
通讯作者：
G. Slafer
影响因子：
5.8
作者：
Ochagavia, Helga;Prieto, Paula;Slafer, Gustavo A.
通讯作者：
Slafer, Gustavo A.