一个编码丝氨酸/苏氨酸蛋白激酶的基因 KERNEL NUMBER PER ROW6 调控玉米的籽粒产量。
A serine/threonine protein kinase encoding gene KERNEL NUMBER PER ROW6 regulates maize grain yield.
机构信息
National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, P. R. China.
State Key Laboratory of Plant Physiology and Biochemistry, National Maize Improvement Center of China, MOA Key Lab of Maize Biology, Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, 100193, P. R. China.
出版信息
Nat Commun. 2020 Feb 20;11(1):988. doi: 10.1038/s41467-020-14746-7.
Increasing grain yield of maize (Zea mays L.) is required to meet the rapidly expanding demands for maize-derived food, feed, and fuel. Breeders have enhanced grain productivity of maize hybrids by pyramiding desirable characteristics for larger ears. However, loci selected for improving grain productivity remain largely unclear. Here, we show that a serine/threonine protein kinase encoding gene KERNEL NUMBER PER ROW6 (KNR6) determines pistillate floret number and ear length. Overexpression of KNR6 or introgression of alleles lacking the insertions of two transposable elements in the regulatory region of KNR6 can significantly enhance grain yield. Further in vitro evidences indicate that KNR6 can interact with an Arf GTPase-activating protein (AGAP) and its phosphorylation by KNR6 may affect ear length and kernel number. This finding provides knowledge basis to enhance maize hybrids grain yield.
提高玉米（Zea mays L.）的谷物产量是满足对玉米衍生食品、饲料和燃料的快速增长需求的必要条件。培育者通过将理想的大穗特征进行聚合来提高玉米杂交种的谷物生产力。然而，用于提高谷物生产力的基因座在很大程度上仍不清楚。在这里，我们发现一个编码丝氨酸/苏氨酸蛋白激酶的基因 KERNEL NUMBER PER ROW6（KNR6）决定了雌花花序的数量和穗长。KNR6 的过表达或在其调控区缺失两个转座元件插入的等位基因的导入可以显著提高谷物产量。进一步的体外证据表明，KNR6 可以与一个 Arf GTPase 激活蛋白（AGAP）相互作用，并且其磷酸化可能影响穗长和籽粒数量。这一发现为提高玉米杂交种的产量提供了知识基础。
Zotero 插件