Tx741, Tx777, Tx779, Tx780, and Tx782 inbred maize lines for yield and southern united states stress adaptation

Seth C. Murray, Kerry Mayfield, Jacob Pekar, Patrick Brown, Aaron Lorenz, Tom Isakeit, Gary Odvody, Wenwei Xu, Javier Betran

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Texas needs maize (Zea mays L.) hybrids with higher yield and better adaptation to the long season and multiple stresses of the state’s environment. Modern commercial inbreds and hybrids have been selected from temperate germplasm that are insufficiently adapted to Texas and other southern US environments. To address this issue, maize inbred lines Tx741 (Reg. No. PL-365, PI 689048), Tx777 (Reg. No. PL-366, PI 689049), Tx779 (Reg. No. PL-367, PI 689050), Tx780 (Reg. No. PL-368, PI 689051), and Tx782 (Reg. No. PL-369, PI 689052) were approved for release by the Texas A&M AgriLife Research breeding program in College Station, TX. These lines were crossed with a variety of commercial testers, and resulting hybrids were grown at multiple locations over several years. Several hybrids from each line produced yields that met or exceeded those of current commercial hybrids. Furthermore, these lines and their hybrids had additional beneficial traits, including high test weight and reduced susceptibility to diseases (including southern rust) and aflatoxin. Derived from unique tropical germplasm or tropical by temperate crosses, these inbred lines were selected under the high day and night temperatures that often cause heat and water stress. Compared with temperate genetics, some of these lines and their hybrids had reduced incidence of southern corn leaf blight and lower susceptibility to Lepidopteran insects. Both lines per se and their hybrids flowered a few days later than commercially available material and had some indications of photoperiod sensitivity. These lines broaden the genetic diversity of US maize, can immediately be used in commercial hybrids, and are useful in breeding new maize lines and hybrids adapted to southern US environments.

Original languageEnglish (US)
Pages (from-to)258-269
Number of pages12
JournalJournal of Plant Registrations
Volume13
Issue number2
DOIs
StatePublished - May 2019

Bibliographical note

Funding Information:
We thank Jim Wilborn, Jeffery Savage, Beto Garza, Jeff Remmers, Nicholas Ace Pugh, and the many graduate students, student workers, and interns who contributed to the collection of this data. We thank Keith Arnold, Quinton Raab, and Bart Hajovsky at BH Genetics for in-kind support of Ganado, TX, yield data. We acknowledge the contributions of Dr. Elizabeth Lee for sharing CG44 and other Guelph, Ontario, lines, Jean Carlo Landivar at Agricomseeds for sharing population germplasm, and Dr. Major Goodman of NC State for sharing germplasm that contributed to some of these lines. For financial support of this research, we thank USDA Hatch Funds, Texas A&M AgriLife Research, the Texas Corn Producers Board, USDA–ARS, and Agriculture and Food Research Initiative Competitive Grant from the USDA National Institute of Food and Agriculture 2014-68004-21836.

Publisher Copyright:
© 2019 Crop Science Society of America. All rights reserved.

Fingerprint

Dive into the research topics of 'Tx741, Tx777, Tx779, Tx780, and Tx782 inbred maize lines for yield and southern united states stress adaptation'. Together they form a unique fingerprint.

Cite this