United Nations Secretary-General Ban Ki-moon will present a free public talk at Stanford on Thursday, Jan. 17.

Ban, who is the eighth secretary-general of the UN, will speak about the UN's role in creating opportunities out of the challenges posed by today's rapidly transitioning world.

"Times of transition are times of profound opportunity," he recently said during his acceptance speech for the Seoul Peace Prize. "The decisions we make in this period will have an impact for generations to come.”

Ban's initiatives as UN secretary-general have focused on promoting sustainable development; empowering women; supporting countries in crisis or instability; generating new momentum on disarmament, arms control, and nonproliferation; and strengthening the UN. Among his many activities as secretary-general, he has successfully raised major pledges and financing packages for aid and crisis response, established the agency UN Women, and introduced new measures to promote UN transparency and efficiency.

"I grew up in war," Ban has said, "and saw the United Nations help my country to recover and rebuild. That experience was a big part of what led me to pursue a career in public service. As secretary-general, I am determined to see this organization deliver tangible, meaningful results that advance peace, development, and human rights."

Ban was born in the Republic of Korea in 1944, and he served for 37 years with the ROK Foreign Ministry, in roles including that of minister of foreign affairs and trade, foreign policy adviser to the president, and chief national security adviser to the president. He took office as UN secretary-general in January 2007, and was re-elected for a second term by the UN General Assembly in June 2011. Ban will serve as secretary-general until December 2016.

"We are deeply honored to have UN Secretary-General Ban Ki-moon visit Stanford," said Gi-Wook Shin, a professor of sociology and director of the Walter H. Shorenstein Asia-Pacific Research Center (Shorenstein APARC). "There are few people who understand global trends and dynamics more deeply than he does."

Ban's Jan. 17 talk will take place at 4:30 p.m. in Stanford's Dinkelspiel Auditorium, 471 Lagunita Drive. Tickets for the event, which are required for admission, will become available through the Stanford Ticket Office on Monday, Jan. 7.

Shorenstein APARC and the Freeman Spogli Institute for International Studies are co-sponsoring the event. Ban's talk, part of the Asia-Pacific Leaders Forum, will kick off a series of activities commemorating Shorenstein APARC's thirtieth anniversary.

Founded in 2005, Shorenstein APARC's Asia-Pacific Leaders Forum regularly convenes senior leaders from across Asia and the Pacific to exchange ideas on current political, economic, and social dynamics in the region.

Scientists are making progress in helping millions of wheat farmers adapt to hotter conditions, but the gains have been uneven, reports a new study led by Stanford University. New approaches to breeding are needed to withstand increasingly common heat waves and keep pace with growing global food demand.

Wheat is the most widely grown crop in the world; unfortunately it is also one of the most sensitive to future global warming. Scientists around the world strive to develop new wheat varieties each year that incorporate improved features, much like car companies release new models each year. Different strategies are commonly used; some target fully irrigated conditions that favor very high yields, while others focus on dry and hot conditions where yield maintenance under stress is a priority.

The team, which includes scientists from Stanford and the International Maize and Wheat Improvement Center (known as CIMMYT), evaluated 25 years of data from historical trials around the globe and analyzed the outcome of different past breeding approaches to help prioritize future strategies. The fully irrigated nursery, known as the elite spring wheat yield trials, produces varieties that are released for the majority of wheat farmers in countries like India and Egypt each year. While cultivars selected under stressed conditions showed significant yield progress at higher temperatures, the elite trials did not.

“There has been very impressive progress in improving yields for the elite varieties at the cooler temperatures that wheat prefers,” explains lead author Sharon Gourdji, a post-doctoral scholar in Stanford’s department of Environmental Earth System Science and Center on Food Security and the Environment (FSE).

“However, to date, our analysis shows a lack of yield gains for these varieties in hot environments over the past 25 years. Along with the gains in cool conditions, this means that the yield difference between cool and hot conditions is getting larger.”

A CIMMYT researcher plants wheat seed in pots in the center's greenhouse facilities. Photo credit: X. Fonseca/CIMMYT

"I think we have learned that the current main approach to breeding won't quite cut it in terms of adapting wheat to climate change,” said co-author David Lobell, assistant professor in Environmental Earth System Science and FSE center fellow. “That is useful information as breeding centers try to raise their game to contend with long-term warming."

Lobell notes that there are good reasons why improved heat tolerance for the elite varieties has not happened naturally.

“Breeding is tough since scientists are aiming for so many traits at once – for example, disease resistance, high yields, and good quality for bread making. Adding heat tolerance is like telling a scout looking for a superstar athlete, ‘by the way, make sure he’s a straight A student’,” said Lobell.

One important lesson from the study is that sifting through historical data can help identify what works and what does not.

“It can often be a hard sell to have breeders take the time to send their data back once they have selected their varieties and moved on,” explains CIMMYT wheat physiologist and co-author Matthew Reynolds. “This study clearly demonstrates the advantage of having these data to assess progress. It shows the genetic potential of wheat to adapt to warmer-than-usual conditions, and reinforces the value of screening under stress as a strategy for adaptation to climate change.”

The progress in the nursery targeted towards stress conditions shows that it is possible to make sizable gains in improving heat tolerance. But whether this can be combined with continued high performance under cooler conditions remains to be seen.

“It is critically important for farmers that they not only survive the bad or hot years, but that they can take full advantage of the favorable years” says Gourdji. “What is needed is a breeding strategy that can successfully achieve both.”

This work was supported by a grant from the Rockefeller Foundation. Additional co-authors of the study include CIMMYT’s Ky Mathews and Jose Crossa.