COMPARISON OF RECURRENT SELECTION METHODS IN WHEAT: I. DESCRIPTION OF METHODS AND EXPECTED RESPONSE
Eleven recurrent selection methods were applied and compared in wheat (Triticum aestivum L.) breeding for grain yield (R). The original population was formed from balanced mixture of seeds from 28 F2 crosses of eight parental lines, where environmental and genetic parameters were estimated with design II of Griffing from the combined analyses of three contrasting environments, and the use of the parameters to compare expected genetic gains (DG). Supposing equal selection intensity, the selection method with greater DG for R per agricultural cycle was that of the S2 families. From the practical point of view of genetic efficiency per cycle and the feasibility in wheat of applying recurrent selection, the method which produced the maximum DG for R in the recombinant population was the alternate selection of selfed lines with S0 individual plant evaluation, with combined selection in S1, and family selection in S2. Selection for spike length increased the expected R by 7 % per selection cycle, compared to direct selection.
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Colegio de Postgraduados
1998
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oai:ojs.pkp.sfu.ca:article15232020-05-14T06:04:46Z COMPARISON OF RECURRENT SELECTION METHODS IN WHEAT: I. DESCRIPTION OF METHODS AND EXPECTED RESPONSE COMPARACION DE METODOS DE SELECCION RECURRENTE EN TRIGO: I. DESCRIPCION DE METODOS Y RESPUESTA ESPERADA Benítez-Riquelme, Ignacio Triticum aestivum L. recurrent selection selection response grain yield spike length plant breeding Triticum aestivum L selección recurrente respuesta a la selección rendimiento de grano longitud de espiga genotecnia vegetal Eleven recurrent selection methods were applied and compared in wheat (Triticum aestivum L.) breeding for grain yield (R). The original population was formed from balanced mixture of seeds from 28 F2 crosses of eight parental lines, where environmental and genetic parameters were estimated with design II of Griffing from the combined analyses of three contrasting environments, and the use of the parameters to compare expected genetic gains (DG). Supposing equal selection intensity, the selection method with greater DG for R per agricultural cycle was that of the S2 families. From the practical point of view of genetic efficiency per cycle and the feasibility in wheat of applying recurrent selection, the method which produced the maximum DG for R in the recombinant population was the alternate selection of selfed lines with S0 individual plant evaluation, with combined selection in S1, and family selection in S2. Selection for spike length increased the expected R by 7 % per selection cycle, compared to direct selection. Se aplican y comparan once métodos de selección recurrente en el mejoramiento genético del rendimiento de grano (R) en trigo (Triticum aestivum L.). Se partió de una población formada con la mezcla balanceada de semilla de las F2 de 28 cruzas de ocho progenitores, a la cual se le estimaron los parámetros genéticos y ambientales mediante el diseño II de Griffing con base en el análisis combinado de sendos experimentos en tres condiciones ambientales contrastantes, y el uso de tales parámetros para comparar ganancias genéticas esperadas (DG). Si se supone igual intensidad de selección, el método de selección que produjo mayor DG para R por ciclo agrícola fue el de familias S2. Desde un punto de vista práctico, de eficiencias genéticas por ciclo agrícola y de viabilidad de aplicación de la selección recurrente en trigo, el diseño genotécnico que produjo el mayor DG para R en la población recombinante fue la selección alternante de líneas autofecundadas con evaluación individual en la generación S0, combinada en S1 y familial en S2. La selección de plantas de mayor longitud de espiga incrementó 7 % el R esperado por ciclo de selección, respecto a la selección directa. Colegio de Postgraduados 1998-03-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares application/pdf https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1523 Agrociencia; Vol. 32 No. 1 (1998): 1998-ene-mar; 29-38 Agrociencia; Vol. 32 Núm. 1 (1998): 1998-ene-mar; 29-38 2521-9766 1405-3195 spa https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1523/1523 |
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Benítez-Riquelme, Ignacio |
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Benítez-Riquelme, Ignacio COMPARISON OF RECURRENT SELECTION METHODS IN WHEAT: I. DESCRIPTION OF METHODS AND EXPECTED RESPONSE |
| author_facet |
Benítez-Riquelme, Ignacio |
| author_sort |
Benítez-Riquelme, Ignacio |
| title |
COMPARISON OF RECURRENT SELECTION METHODS IN WHEAT: I. DESCRIPTION OF METHODS AND EXPECTED RESPONSE |
| title_short |
COMPARISON OF RECURRENT SELECTION METHODS IN WHEAT: I. DESCRIPTION OF METHODS AND EXPECTED RESPONSE |
| title_full |
COMPARISON OF RECURRENT SELECTION METHODS IN WHEAT: I. DESCRIPTION OF METHODS AND EXPECTED RESPONSE |
| title_fullStr |
COMPARISON OF RECURRENT SELECTION METHODS IN WHEAT: I. DESCRIPTION OF METHODS AND EXPECTED RESPONSE |
| title_full_unstemmed |
COMPARISON OF RECURRENT SELECTION METHODS IN WHEAT: I. DESCRIPTION OF METHODS AND EXPECTED RESPONSE |
| title_sort |
comparison of recurrent selection methods in wheat: i. description of methods and expected response |
| description |
Eleven recurrent selection methods were applied and compared in wheat (Triticum aestivum L.) breeding for grain yield (R). The original population was formed from
balanced mixture of seeds from 28 F2 crosses of eight parental lines, where environmental and genetic parameters were estimated with design II of Griffing from the combined analyses of three
contrasting environments, and the use of the parameters to compare expected genetic gains (DG). Supposing equal selection intensity, the selection method with greater DG for R per
agricultural cycle was that of the S2 families. From the practical point of view of genetic efficiency per cycle and the feasibility in wheat of applying recurrent selection, the method which
produced the maximum DG for R in the recombinant population was the alternate selection of selfed lines with S0 individual plant evaluation, with combined selection in S1, and family
selection in S2. Selection for spike length increased the expected R by 7 % per selection cycle, compared to direct selection. |
| publisher |
Colegio de Postgraduados |
| publishDate |
1998 |
| url |
https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1523 |
| work_keys_str_mv |
AT benitezriquelmeignacio comparisonofrecurrentselectionmethodsinwheatidescriptionofmethodsandexpectedresponse AT benitezriquelmeignacio comparaciondemetodosdeseleccionrecurrenteentrigoidescripciondemetodosyrespuestaesperada |
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1819154832917790720 |