Aflatoxin Accumulation in a Maize Diallel Cross Containing Inbred Lines with Expired Plant Variety Protection

In-field infection of maize (<i>Zea mays</i> L.) ears by the fungus <i>Aspergillus flavus</i> Link:Fr causes pre-harvest aflatoxin contamination of maize grain. Germplasm lines with host-plant resistance to aflatoxin accumulation are available to breeders, but these lines oft...

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Autores principales:	Jesse Spencer Smith, William Paul Williams
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	<i>Aspergillus flavus</i> aflatoxin maize host-plant resistance Agriculture S
Acceso en línea:	https://doaj.org/article/1df10754f734449d87feb187a2fef38f
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spelling	oai:doaj.org-article:1df10754f734449d87feb187a2fef38f2021-11-25T16:10:20ZAflatoxin Accumulation in a Maize Diallel Cross Containing Inbred Lines with Expired Plant Variety Protection10.3390/agronomy111122852073-4395https://doaj.org/article/1df10754f734449d87feb187a2fef38f2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4395/11/11/2285https://doaj.org/toc/2073-4395In-field infection of maize (<i>Zea mays</i> L.) ears by the fungus <i>Aspergillus flavus</i> Link:Fr causes pre-harvest aflatoxin contamination of maize grain. Germplasm lines with host-plant resistance to aflatoxin accumulation are available to breeders, but these lines often possess undesirable agronomic characteristics. Commercial lines with expired plant variety protection (ex-PVP lines) are a potential source of elite germplasm available to public maize breeders. A diallel cross containing three aflatoxin-accumulation-resistant germplasm lines and seven ex-PVP lines were evaluated in replicated trials for aflatoxin contamination after artificial inoculation and for yield. The resistant germplasm lines Mp313E, Mp715, and Mp717 were the only lines with significant general combining ability (GCA) for reduced aflatoxin accumulation. Of the ex-PVP lines evaluated, the Stiff-Stalk line F118 was the most promising line to use in breeding crosses. Based on its GCA, it was the only ex-PVP line that did not significantly increase aflatoxin and the only ex-PVP line that significantly increased yield. Second-cycle breeding lines derived from crosses between F118 and the resistant donor lines will be valuable if they combine the donor lines’ disease resistance with F118’s earlier maturity while introgressing the disease resistance into a genetic background that aligns with the industry’s well-defined heterotic groups.Jesse Spencer SmithWilliam Paul WilliamsMDPI AGarticle<i>Aspergillus flavus</i>aflatoxinmaizehost-plant resistanceAgricultureSENAgronomy, Vol 11, Iss 2285, p 2285 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	<i>Aspergillus flavus</i> aflatoxin maize host-plant resistance Agriculture S
spellingShingle	<i>Aspergillus flavus</i> aflatoxin maize host-plant resistance Agriculture S Jesse Spencer Smith William Paul Williams Aflatoxin Accumulation in a Maize Diallel Cross Containing Inbred Lines with Expired Plant Variety Protection
description	In-field infection of maize (<i>Zea mays</i> L.) ears by the fungus <i>Aspergillus flavus</i> Link:Fr causes pre-harvest aflatoxin contamination of maize grain. Germplasm lines with host-plant resistance to aflatoxin accumulation are available to breeders, but these lines often possess undesirable agronomic characteristics. Commercial lines with expired plant variety protection (ex-PVP lines) are a potential source of elite germplasm available to public maize breeders. A diallel cross containing three aflatoxin-accumulation-resistant germplasm lines and seven ex-PVP lines were evaluated in replicated trials for aflatoxin contamination after artificial inoculation and for yield. The resistant germplasm lines Mp313E, Mp715, and Mp717 were the only lines with significant general combining ability (GCA) for reduced aflatoxin accumulation. Of the ex-PVP lines evaluated, the Stiff-Stalk line F118 was the most promising line to use in breeding crosses. Based on its GCA, it was the only ex-PVP line that did not significantly increase aflatoxin and the only ex-PVP line that significantly increased yield. Second-cycle breeding lines derived from crosses between F118 and the resistant donor lines will be valuable if they combine the donor lines’ disease resistance with F118’s earlier maturity while introgressing the disease resistance into a genetic background that aligns with the industry’s well-defined heterotic groups.
format	article
author	Jesse Spencer Smith William Paul Williams
author_facet	Jesse Spencer Smith William Paul Williams
author_sort	Jesse Spencer Smith
title	Aflatoxin Accumulation in a Maize Diallel Cross Containing Inbred Lines with Expired Plant Variety Protection
title_short	Aflatoxin Accumulation in a Maize Diallel Cross Containing Inbred Lines with Expired Plant Variety Protection
title_full	Aflatoxin Accumulation in a Maize Diallel Cross Containing Inbred Lines with Expired Plant Variety Protection
title_fullStr	Aflatoxin Accumulation in a Maize Diallel Cross Containing Inbred Lines with Expired Plant Variety Protection
title_full_unstemmed	Aflatoxin Accumulation in a Maize Diallel Cross Containing Inbred Lines with Expired Plant Variety Protection
title_sort	aflatoxin accumulation in a maize diallel cross containing inbred lines with expired plant variety protection
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1df10754f734449d87feb187a2fef38f
work_keys_str_mv	AT jessespencersmith aflatoxinaccumulationinamaizediallelcrosscontaininginbredlineswithexpiredplantvarietyprotection AT williampaulwilliams aflatoxinaccumulationinamaizediallelcrosscontaininginbredlineswithexpiredplantvarietyprotection
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Aflatoxin Accumulation in a Maize Diallel Cross Containing Inbred Lines with Expired Plant Variety Protection

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