The home field advantage of modern plant breeding

Autoři: Patrick M. Ewing aff001;  Bryan C. Runck aff002;  Thomas Y. J. Kono aff003;  Michael B. Kantar aff004
Působiště autorů: Department of Crop, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI, United States of America aff001;  GEMS Agroinformatics Initiative, University of Minnesota, Minneapolis, MN, United States of America aff002;  Minnesota Supercomputing Institute, Minneapolis, MN, United States of America aff003;  Department of Tropical Plant and Soil Science, University of Hawaii at Manoa, Honolulu, HI, United States of America aff004
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article


Since the mid-20th century, crop breeding has driven unprecedented yield gains. Breeders generally select for broadly- and reliably-performing varieties that display little genotype-by-environment interaction (GxE). In contrast, ecological theory predicts that across environments that vary spatially or temporally, the most productive population will be a mixture of narrowly adapted specialists. We quantified patterns of broad and narrow adaptation in modern, commercial maize (Zea mays L.) hybrids planted across 216 site-years, from 1999–2018, for the University of Illinois yield trials. We found that location was the dominant source of yield variation (44.5%), and yearly weather was the smallest (1.7%), which suggested a benefit for reliable performance in narrow biophysical environments. Varieties displayed a large “home field advantage” when growing in the location of best performance relative to other varieties. Home field advantage accounted for 19% of GxE and provided a yield increase of 1.01 ± 0.04 Mg ∙ ha-1 (7.6% relative to mean yield), yet was both smaller than predicted by a null model and unchanged across time. This counterfactual suggests that commercial breeding programs have missed an opportunity to further increase yields by leveraging local adaptation. Public breeding programs may pursue this opportunity by releasing specialist varieties that perform reliably in narrow environments. As seed sources are increasingly privatized and consolidated, this alternate strategy may compliment private breeding to support global food security.

Klíčová slova:

Agronomy – Crop genetics – Crops – Maize – Permutation – Plant breeding – Illinois


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2019 Číslo 12
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