@article{tarter_holland_2006, title={Gains from selection during the development of semiexotic inbred lines from Latin American maize accessions}, volume={51}, number={1}, journal={Maydica}, author={Tarter, J. A. and Holland, J. B.}, year={2006}, pages={15–23} }
 @article{tarter_goodman_holland_2004, title={Recovery of exotic alleles in semiexotic maize inbreds derived from crosses between Latin American accessions and a temperate line}, volume={109}, ISSN={["0040-5752"]}, DOI={10.1007/s00122-004-1660-6}, abstractNote={Genetic diversity of elite maize germplasm in the United States is narrow relative to the species worldwide. Tropical maize represents the most diverse source of germplasm. To incorporate germplasm from tropical maize landraces into the temperate gene pool, 23 Latin American maize accessions were crossed to temperate inbred line Mo44. During inbred line development, selection was practiced in temperate environments, potentially resulting in the loss of substantial proportions of tropical alleles. Genotyping 161 semiexotic inbreds at 51 simple sequence repeat (SSR) loci permitted the classification of their alleles as either Mo44 or tropical and allowed estimation of the proportion of detectable tropical alleles retained in these lines. On average, the percentage of detectable tropical alleles ranged among lines from 15% to 56%, with a mean of 31%. These are conservative, lower-bound estimates of the proportion of tropical germplasm within lines, because it is not known how frequently Mo44 and the tropical maize accession parental populations shared SSR alleles. These results suggest that substantial proportions of exotic germplasm were recovered in the semiexotic lines, despite their selection in temperate environments. The percent of tropical germplasm in semiexotic lines was not correlated to grain yield or moisture of lines testcrossed to a Corn Belt Dent tester, indicating that the incorporation of a substantial percentage of tropical germplasm in an inbred line does not necessarily negatively impact its combining ability. Thus, tropical maize accessions represent a good source of exotic germplasm to broaden the genetic base of temperate maize without hindering agronomic performance.}, number={3}, journal={THEORETICAL AND APPLIED GENETICS}, author={Tarter, JA and Goodman, MM and Holland, JB}, year={2004}, month={Aug}, pages={609–617} }
 @article{tarter_goodman_holland_2003, title={Testcross performance of semiexotic inbred lines derived from Latin American maize accessions}, volume={43}, ISSN={["1435-0653"]}, DOI={10.2135/cropsci2003.2272}, abstractNote={Tropical maize (Zea mays L.) represents the most diverse readily available source of germplasm to broaden the limited genetic base of temperate maize in the USA. One objective of this study was to determine if exotic‐derived alleles contributing to enhanced testcross agronomic performance were maintained in semiexotic lines created by inbreeding and pedigree selection. A second objective was to determine if first‐generation semiexotic lines could produce hybrids with agronomic performance comparable to commercial U.S. hybrids. One hundred sixty‐four semiexotic inbred lines were developed from crosses between temperate‐adapted inbred line Mo44 and 23 Latin American maize accessions. Mo44 and each semiexotic line were testcrossed to temperate hybrid LH132 × LH51 for evaluations. In first‐stage replicated yield trials, testcrosses of 18 semiexotic lines, representing six different races, had significantly greater grain yields than the Mo44 testcross. Advanced yield evaluations were performed on check entries and 33 selected semiexotic line testcrosses in three additional environments. Across 10 environments, 12 semiexotic line testcrosses exhibited significantly greater grain yield than the Mo44 testcross, indicating recovery of favorable exotic alleles. Semiexotic testcrosses were not competitive with commercial hybrids for grain yield but were similar to or better than commercial hybrids for grain moisture and lodging resistance. Many superior accessions represent relatively recent introductions into regions from which they were collected. Tropical landraces seem to be a good source of exotic germplasm that can be used to broaden the genetic base of modern U.S. maize production and improve productivity.}, number={6}, journal={CROP SCIENCE}, author={Tarter, JA and Goodman, MM and Holland, JB}, year={2003}, pages={2272–2278} }