Evaluation of temperate quality protein maize (QPM) hybrids for field performance and grain quality

ABSTRACT Quality protein maize (QPM) (Zea mays L.) is primarily used for food in countries of tropical and sub-tropical regions where maize is the main source of protein. Although its cultivation in temperate regions is hampered by residues of exotic germplasm, it could be beneficial for use in live...

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Autores principales:	Ignjatovic-Micic,Dragana, Kostadinovic,Marija, Bozinovic,Sofija, Djordjevic-Melnik,Olivera, Stankovic,Goran, Delic,Nenad, Vancetovic,Jelena
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2020
Materias:	Adapted QPM grain yield kernel modifications protein content tryptophan content Zea mays
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392020000400598
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spelling	oai:scielo:S0718-583920200004005982020-11-22Evaluation of temperate quality protein maize (QPM) hybrids for field performance and grain qualityIgnjatovic-Micic,DraganaKostadinovic,MarijaBozinovic,SofijaDjordjevic-Melnik,OliveraStankovic,GoranDelic,NenadVancetovic,Jelena Adapted QPM grain yield kernel modifications protein content tryptophan content Zea mays ABSTRACT Quality protein maize (QPM) (Zea mays L.) is primarily used for food in countries of tropical and sub-tropical regions where maize is the main source of protein. Although its cultivation in temperate regions is hampered by residues of exotic germplasm, it could be beneficial for use in livestock feeds as it was shown that substitution of standard maize with QPM can improve livestock characteristics and decrease dietary lysine supplementation. The aim of this study was to test 11 QPM hybrids obtained by crossing adapted QPM inbred lines for their performance in field trials in 2 yr at four locations, as well as to determine their relevant biochemical components. The main reason for rejecting nine QPM hybrids was low grain yield, standard hybrids had higher yields on average for 37.8%. Hybrid ZPQPM6 had good agronomic characteristics, but its biochemical components were nonsignificantly different from the standard hybrid. Only hybrid ZPQPM13 met necessary criteria, grain yield comparable with standard hybrids, high tryptophan content in different environments (average 0.083%) and hard endosperm (average score 1.87). Lysine content, measured after mercantile production, was 0.44%. Quality index, although below the QPM threshold (which is 0.80%) was significantly higher (p < 0.05) in ZPQPM13 in comparison with standard hybrid, indicating improved nutritional quality of the protein. The results indicated that presence of exotic germplasm in these QPM hybrids is a consequential difficulty and that in their parental inbred lines at least one more backcross with temperate germplasm should be done to select better adapted QPM.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.80 n.4 20202020-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392020000400598en10.4067/S0718-58392020000400598
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Adapted QPM grain yield kernel modifications protein content tryptophan content Zea mays
spellingShingle	Adapted QPM grain yield kernel modifications protein content tryptophan content Zea mays Ignjatovic-Micic,Dragana Kostadinovic,Marija Bozinovic,Sofija Djordjevic-Melnik,Olivera Stankovic,Goran Delic,Nenad Vancetovic,Jelena Evaluation of temperate quality protein maize (QPM) hybrids for field performance and grain quality
description	ABSTRACT Quality protein maize (QPM) (Zea mays L.) is primarily used for food in countries of tropical and sub-tropical regions where maize is the main source of protein. Although its cultivation in temperate regions is hampered by residues of exotic germplasm, it could be beneficial for use in livestock feeds as it was shown that substitution of standard maize with QPM can improve livestock characteristics and decrease dietary lysine supplementation. The aim of this study was to test 11 QPM hybrids obtained by crossing adapted QPM inbred lines for their performance in field trials in 2 yr at four locations, as well as to determine their relevant biochemical components. The main reason for rejecting nine QPM hybrids was low grain yield, standard hybrids had higher yields on average for 37.8%. Hybrid ZPQPM6 had good agronomic characteristics, but its biochemical components were nonsignificantly different from the standard hybrid. Only hybrid ZPQPM13 met necessary criteria, grain yield comparable with standard hybrids, high tryptophan content in different environments (average 0.083%) and hard endosperm (average score 1.87). Lysine content, measured after mercantile production, was 0.44%. Quality index, although below the QPM threshold (which is 0.80%) was significantly higher (p < 0.05) in ZPQPM13 in comparison with standard hybrid, indicating improved nutritional quality of the protein. The results indicated that presence of exotic germplasm in these QPM hybrids is a consequential difficulty and that in their parental inbred lines at least one more backcross with temperate germplasm should be done to select better adapted QPM.
author	Ignjatovic-Micic,Dragana Kostadinovic,Marija Bozinovic,Sofija Djordjevic-Melnik,Olivera Stankovic,Goran Delic,Nenad Vancetovic,Jelena
author_facet	Ignjatovic-Micic,Dragana Kostadinovic,Marija Bozinovic,Sofija Djordjevic-Melnik,Olivera Stankovic,Goran Delic,Nenad Vancetovic,Jelena
author_sort	Ignjatovic-Micic,Dragana
title	Evaluation of temperate quality protein maize (QPM) hybrids for field performance and grain quality
title_short	Evaluation of temperate quality protein maize (QPM) hybrids for field performance and grain quality
title_full	Evaluation of temperate quality protein maize (QPM) hybrids for field performance and grain quality
title_fullStr	Evaluation of temperate quality protein maize (QPM) hybrids for field performance and grain quality
title_full_unstemmed	Evaluation of temperate quality protein maize (QPM) hybrids for field performance and grain quality
title_sort	evaluation of temperate quality protein maize (qpm) hybrids for field performance and grain quality
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392020000400598
work_keys_str_mv	AT ignjatovicmicicdragana evaluationoftemperatequalityproteinmaizeqpmhybridsforfieldperformanceandgrainquality AT kostadinovicmarija evaluationoftemperatequalityproteinmaizeqpmhybridsforfieldperformanceandgrainquality AT bozinovicsofija evaluationoftemperatequalityproteinmaizeqpmhybridsforfieldperformanceandgrainquality AT djordjevicmelnikolivera evaluationoftemperatequalityproteinmaizeqpmhybridsforfieldperformanceandgrainquality AT stankovicgoran evaluationoftemperatequalityproteinmaizeqpmhybridsforfieldperformanceandgrainquality AT delicnenad evaluationoftemperatequalityproteinmaizeqpmhybridsforfieldperformanceandgrainquality AT vancetovicjelena evaluationoftemperatequalityproteinmaizeqpmhybridsforfieldperformanceandgrainquality
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Evaluation of temperate quality protein maize (QPM) hybrids for field performance and grain quality

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