赵天永

一、 简介：

赵天永，教授，博士生导师。1990年本科毕业于河北农业大学园艺系。1998年获中国农业大学作物遗传育种专业博士学位。1998至2011年曾在美国加州大学伯克利分校（U.C.Berkeley）和肯塔基大学（University of Kentucky）从事博士后研究并随后任职Scientist I、Scientist II。2011年3月起就职于西北农林科技大学,主要从事玉米抗逆分子生物学研究工作，发现了棉子糖是控制玉米耐旱耐热的关键因素，通过调控棉子糖代谢能够提高玉米的耐旱和耐热能力。主持国家转基因专项重点项目、国家自然基金面上项目和陕西省自然基金项目。目前承担本科生《分子生物学》英文教学工作以及博士生的《生命科学研究进展》课程。

二、研究方向：玉米抗逆分子生物学

我们鉴定了具有自主知识产权的玉米耐旱、耐热基因，通过转基因技术改良的玉米杂交种在干旱条件下较我国玉米主栽品种郑单958增产40%以上，在浇水条件下较对照未减产。用此项技术可以系统改良我国现有玉米主栽品种，大幅度提高玉米在旱区的产量。

首先通过转基因手段获得了耐旱耐热的转基因玉米综31自交系，之后通过回交转育改良了郑单958的亲本自交系昌7-2并制备了改良杂交种。改良杂交种在干旱条件下表型优于对照郑单958品种（图1）。

图1 改良杂交种在干旱条件下植株表型优于对照郑单958品种。A.育种谱系说明； B.干旱条件下的植株表型比较（2023甘肃景泰）。

2023年在甘肃景泰进行了产量测定。改良品种在浇水条件下产量较对照郑单958增加2.3%，在干旱条件下较对照郑单958增产48.9%（图2）。

图2 改良杂交种和对照郑单958在浇水和干旱条件下的产量比较（2023甘肃景泰）。A. 浇水条件下各半行果穗形态比较；B.浇水条件下产量比较。C.干旱条件下各一行果穗形态比较；D.干旱条件下产量比较。

三、相关论文 （第一或通讯作者论文）

(1)Ying Liu, Tao Li, Chunxia Zhang, Wenli Zhang, Nan Deng,  Lynnette M. Dirk, A. Bruce Downie, Tianyong Zhao*, 2023, Raffinose positively regulates maize drought tolerance by reducing leaf transpiration. The Plant Journal. 114（1）: 55-67.

(2)Yumin Zhang, Xianbo Song, Wenli Zhang, Feijun Liu, Chunmei Wang, Ying Liu, Lynnette M. A. Dirk, A. Bruce Downie, Tianyong Zhao*; Maize PIMT2 repairs damaged 3-METHYLCROTONYL COA CARBOXYLASE in mitochondria, affecting seed vigor. The Plant Journal. 2023 115(1):220-235

(3)Yumin Zhang , Dan Li, Lynnette M. Dirk, A. Bruce Downie, Tianyong Zhao*,2021, ZmAGA1 hydrolyzes rfos late during the lag phase of seed germination, shifting sugar metabolism toward seed germination over seed aging tolerance. Journal of Agricultural and Food Chemistry. 69 (39):11606-11615.

(4)Qinghui Han, Kelu Chen, Dong Yan, Guanglong Hao, Junlong Qi, Chunmei Wang, Lynnette M. Dirk, A. Bruce Downie, Jianhua Gong, Jianhua Wang, Tianyong Zhao*, 2020, ZmDREB2A regulates ZmGH3.2 and ZmRAFS, shifting metabolism towards seed aging tolerance over seedling growth. The Plant Journal. 104(1): 268-282.

(5)Tao Li, Yumin Zhang, Ying Liu, Xudong Li, Guanglong Hao, Qinghui Han, Lynnette M. Dirk, A Bruce Downie, Yong-Ling Ruan, Jianmin Wang, Guoying Wang, Tianyong Zhao*, 2020, Raffinose synthase enhances drought tolerance through raffinose synthesis or galactinol hydrolysis in maize and  Arabidopsis plants. Journal of Biological Chemistry. 2020, 295:8064-8077.

(6)Qinghui Han, Junlong Qi, Guanglong Hao, Chunxia Zhang, Chunmei Wang, Lynnette M. Dirk, A Bruce Downie, Tianyong Zhao*, 2020, ZmDREB1A regulates RAFFINOSE SYNTHASE controlling raffinose accumulation and plant chilling stress tolerance in maize. Plant and Cell Physiology. 61: 331-341.

(7)Lei Gu, Tao Jiang, Chunxia Zhang, Xudong Li, Chunmei Wang, Yumin Zhang, Tao Li, Lynnette Dirk, Bruce Downie, Tianyong Zhao*, 2019, Maize HSFA2 and HSBP2 antagonistically modulate raffinose biosynthesis and heat tolerance in Arabidopsis. The Plant Journal.  100:128-142.

(8)Yumin Zhang, Qichao, Sun, Guanglong Hao, Chunmei Wang, Lynnette, Dirk, Bruce Downie, Tianyong Zhao*, 2019, Maize VIVIPAROUS1 Interacts with ABA INSENSITIVE5 to Regulate GALACTINOL SYNTHASE2 Expression Controlling Seed Raffinose Accumulation. Journal of Agricultural and Food Chemistry. 67(15): 4214-4223.

(9)Tao Li, Yumin Zhang, Dong Wang, Ying Liu, Lynnette Dirk, Jack Goodman, Bruce Downie, Jianmin Wang, Guoying Wang, Tianyong Zhao*, 2017, Regulation of seed vigor by manipulation of raffinose family oligosaccharides (RFOs) in maize and Arabidopsis. Molecular Plant. 10(12): 1540-1555.

(10)Lei Gu, Yumin Zhang, Mingshuai Zhang, Tao Li, Lynnette M.A. Dirk,  Bruce Downie, Tianyong Zhao*, 2016, ZmGOLS2, a target of transcription factor ZmDREB2A, offers similar protection against abiotic stress as ZmDREB2A. Plant Molecular Biology. 90:157-170

(11)Qinghui Han, Tao Li, Lifeng Zhang, Lynnette M.A. Dirk, Bruce Downie, Tianyong Zhao*, 2015, Functional analysis of the 5’ regulatory region of the maize ALKALINE ALPHA-GALACTOSIDASE1 gene. Plant Molecular Biology Reporter. 33:1361-1370.

(12)Lei Gu, Zhaoxue Han, Lifeng Zhang, Bruce Downie, Tianyong Zhao*, 2013, Functional analysis of the 5’ regulatory region of the maize GALACTINOL SYNTHASE2 gene, Plant Science. 213：38-45.

(13)Tianyong Zhao, J. Willis Corum III, Jeffrey Mullen, Robert B. Meeley, Timothy Helentjaris, David Martin, and Bruce Downie, 2006, An alkaline a-galactosidase transcript is present in maize seeds and cultured embryo cells, and accumulates during stress. Seed Science Research. 16:107-121 .

(14)Tianyong Zhao, Richard Thacker, J. Willis Corum III, John C. Snyder, Robert B. Meeley, Ralph Obendorf, and Bruce Downie, 2004, Expression of the maize  GALACTINOL SYNTHASE gene family. I) Expression of two different genes during seed development and germination. Physiol. Plant. 121(4):634-646.

(15)Tianyong Zhao, David Martin, Robert B. Meeley, and Bruce Downie, 2004, Expression of the maize  GALACTINOL SYNTHASE gene family. II) Kernel abscission, environmental stress and  myo -inositol influences accumulation of transcript in developing seeds and callus cells. Physiol. Plant.121 (4): 647-655.

(16)Tianyong Zhao, Robert Meeley, and Bruce Downie, 2003, Aberrant processing of a Maize  GALACTINOL SYNTHASE transcript is caused by heat stress. Plant Science. 165:245-256.

联系方式：tzhao2@nwafu.edu.cn （本实验室招聘有作物遗传育种、生化化学、分子生物学背景的博士后，待遇从优）。