Preliminary comparisons of early generation individual selection efficiency of a local wheat landrace under different experimental field designs

ABSTRACT Wheat (Triticum aestivum L.) landraces are traditional adapted varieties developed and used by farmers but not usually improved by breeders. The objective of our study was to compare the efficiency of three different methods (arrangements) of homogeneity blocks to produce high-yield progeni...

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Auteurs principaux:	Greveniotis,Vasileios, Sioki,Evangelia, Ipsilandis,Constantinos G.
Langue:	English
Publié:	Instituto de Investigaciones Agropecuarias, INIA 2019
Sujets:	Evaluation gridding heterogeneity honeycomb Triticum aestivum.
Accès en ligne:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000200210
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spelling	oai:scielo:S0718-583920190002002102019-05-14Preliminary comparisons of early generation individual selection efficiency of a local wheat landrace under different experimental field designsGreveniotis,VasileiosSioki,EvangeliaIpsilandis,Constantinos G. Evaluation gridding heterogeneity honeycomb Triticum aestivum. ABSTRACT Wheat (Triticum aestivum L.) landraces are traditional adapted varieties developed and used by farmers but not usually improved by breeders. The objective of our study was to compare the efficiency of three different methods (arrangements) of homogeneity blocks to produce high-yield progenies during the breeding procedure of a local bread wheat landrace. This original genetic material underwent a mass selection scheme in F2 individual plants in three different experimental designs to reduce soil heterogeneity (honeycomb, gridding, double rows); selection was based on individual plant grain weight. In F3 lines, bulk density was the selection criterion in a specific arrangement that divided the experimental field into three plots for 12 subplots to reduce soil heterogeneity. The F4 lines were evaluated in randomized complete block trials for 2 yr based on grain yield, 1000-kernel weight, and bulk density. Progenies from the three different experimental designs were compared. The gridding method seemed more efficient for evaluating sister lines because it maximized yields, provided a greater number of promising lines, and F3/F4 correlations were high and significant. Wheat plants did not perform well under the double row system (mean bulk density 756 g L-1). Heritability was high for all studied traits (0.93) and bulk density was a reliable criterion for selecting promising genetic materials (90.1% genotype contribution in variability) and revealed differences between methods. The local landrace was unstable and exhibited specific adaptability to the cultivated environment. Selected lines (from the most efficient method) improved yield performance by 11% on the average compared with the original population.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.79 n.2 20192019-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000200210en10.4067/S0718-58392019000200210
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Evaluation gridding heterogeneity honeycomb Triticum aestivum.
spellingShingle	Evaluation gridding heterogeneity honeycomb Triticum aestivum. Greveniotis,Vasileios Sioki,Evangelia Ipsilandis,Constantinos G. Preliminary comparisons of early generation individual selection efficiency of a local wheat landrace under different experimental field designs
description	ABSTRACT Wheat (Triticum aestivum L.) landraces are traditional adapted varieties developed and used by farmers but not usually improved by breeders. The objective of our study was to compare the efficiency of three different methods (arrangements) of homogeneity blocks to produce high-yield progenies during the breeding procedure of a local bread wheat landrace. This original genetic material underwent a mass selection scheme in F2 individual plants in three different experimental designs to reduce soil heterogeneity (honeycomb, gridding, double rows); selection was based on individual plant grain weight. In F3 lines, bulk density was the selection criterion in a specific arrangement that divided the experimental field into three plots for 12 subplots to reduce soil heterogeneity. The F4 lines were evaluated in randomized complete block trials for 2 yr based on grain yield, 1000-kernel weight, and bulk density. Progenies from the three different experimental designs were compared. The gridding method seemed more efficient for evaluating sister lines because it maximized yields, provided a greater number of promising lines, and F3/F4 correlations were high and significant. Wheat plants did not perform well under the double row system (mean bulk density 756 g L-1). Heritability was high for all studied traits (0.93) and bulk density was a reliable criterion for selecting promising genetic materials (90.1% genotype contribution in variability) and revealed differences between methods. The local landrace was unstable and exhibited specific adaptability to the cultivated environment. Selected lines (from the most efficient method) improved yield performance by 11% on the average compared with the original population.
author	Greveniotis,Vasileios Sioki,Evangelia Ipsilandis,Constantinos G.
author_facet	Greveniotis,Vasileios Sioki,Evangelia Ipsilandis,Constantinos G.
author_sort	Greveniotis,Vasileios
title	Preliminary comparisons of early generation individual selection efficiency of a local wheat landrace under different experimental field designs
title_short	Preliminary comparisons of early generation individual selection efficiency of a local wheat landrace under different experimental field designs
title_full	Preliminary comparisons of early generation individual selection efficiency of a local wheat landrace under different experimental field designs
title_fullStr	Preliminary comparisons of early generation individual selection efficiency of a local wheat landrace under different experimental field designs
title_full_unstemmed	Preliminary comparisons of early generation individual selection efficiency of a local wheat landrace under different experimental field designs
title_sort	preliminary comparisons of early generation individual selection efficiency of a local wheat landrace under different experimental field designs
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000200210
work_keys_str_mv	AT greveniotisvasileios preliminarycomparisonsofearlygenerationindividualselectionefficiencyofalocalwheatlandraceunderdifferentexperimentalfielddesigns AT siokievangelia preliminarycomparisonsofearlygenerationindividualselectionefficiencyofalocalwheatlandraceunderdifferentexperimentalfielddesigns AT ipsilandisconstantinosg preliminarycomparisonsofearlygenerationindividualselectionefficiencyofalocalwheatlandraceunderdifferentexperimentalfielddesigns
_version_	1714205387421384704

Preliminary comparisons of early generation individual selection efficiency of a local wheat landrace under different experimental field designs

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