ALTERNATE COMBINED SELECTION OF S1 AND S2 LINES

ALTERNATE COMBINED SELECTION OF S1 AND S2 LINES

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A plant breeding method called Alternate combined selection of S1 and S2 lines (SCA) is proposed and described, including its genetic response. It alternates one cycle of combined selection of S1 lines (SCS1) with one cycle of combined selection of S2 lines (SCS2), through two successive generations of self-pollination. One cycle of SCA requires three planting seasons: S1 lines development, evaluation and self-pollination on SCS1, and evaluationrecombination on SCS2. According to the derived genetic response (R) and comparing efficiencies per year with respect to the modified ear-to-row selection response(L), computed with the formula (RSCA-RL)/RL in populations with p=q=0.5, the SCA method was 1.47 times more efficient per year than L when the recombination of S2 lines is with a common pollinator, and 2.15 times higher when the recombination of S2 lines is plant to plant or by mass crossing at flowering.

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Main Author: Benítez-Riquelme, Ignacio
Format: Digital revista
Language:spa
Published: Colegio de Postgraduados 1996
Online Access:https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1420
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spelling oai:ojs.pkp.sfu.ca:article14202020-05-14T05:46:53Z ALTERNATE COMBINED SELECTION OF S1 AND S2 LINES SELECCION COMBINADA ALTERNANTE DE LINEAS S1 Y S2 Benítez-Riquelme, Ignacio Triticum aestivum L. Zea mays L. S1 lines S2 lines combined selection genetic advance Triticum aestivum L. Zea mays L. líneas S1 líneas S2 selección combinada avance genético A plant breeding method called Alternate combined selection of S1 and S2 lines (SCA) is proposed and described, including its genetic response. It alternates one cycle of combined selection of S1 lines (SCS1) with one cycle of combined selection of S2 lines (SCS2), through two successive generations of self-pollination. One cycle of SCA requires three planting seasons: S1 lines development, evaluation and self-pollination on SCS1, and evaluationrecombination on SCS2. According to the derived genetic response (R) and comparing efficiencies per year with respect to the modified ear-to-row selection response(L), computed with the formula (RSCA-RL)/RL in populations with p=q=0.5, the SCA method was 1.47 times more efficient per year than L when the recombination of S2 lines is with a common pollinator, and 2.15 times higher when the recombination of S2 lines is plant to plant or by mass crossing at flowering. Se hace la descripción y derivación del método de mejoramiento genético vegetal denominado Selección combinada alternante de líneas S1 y S2 (SCA), en la que en dos generaciones sucesivas de autofecundación se alternan la selección combinada de líneas S1 (SCS1) con la selección combinada de líneas S2 (SCS2). Un ciclo completo de SCA requiere de tres ciclos de siembra: formación de líneas S1, evaluación-autofecundación en SCS1 y evaluación-recombinación en SCS2. Con base en el avance genético esperado (R) y comparando eficiencias por año respecto a la respuesta que se obtiene con la selección modificada mazorca por surco (L), mediante (RSCA-RL)/RL, en poblaciones con p=q=0.5, se encontró que la SCA fue 1.47 veces más eficiente por año que L, cuando la recombinación es con un polinizador común y 2.15 veces cuando se recombina en la forma planta a planta o cruzas masivas a la floración. Colegio de Postgraduados 1996-09-30 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/1420 Agrociencia; Vol. 30 No. 3 (1996): 1996-jul-sep; 361-367 Agrociencia; Vol. 30 Núm. 3 (1996): 1996-jul-sep; 361-367 2521-9766 1405-3195 spa https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1420/1420
institution COLPOS
collection OJS
country México
countrycode MX
component Revista
access En linea
databasecode rev-agrociencia-mx
tag revista
region America del Norte
libraryname Departamento de documentación y biblioteca de COLPOS
language spa
format Digital
author Benítez-Riquelme, Ignacio
spellingShingle Benítez-Riquelme, Ignacio
ALTERNATE COMBINED SELECTION OF S1 AND S2 LINES
author_facet Benítez-Riquelme, Ignacio
author_sort Benítez-Riquelme, Ignacio
title ALTERNATE COMBINED SELECTION OF S1 AND S2 LINES
title_short ALTERNATE COMBINED SELECTION OF S1 AND S2 LINES
title_full ALTERNATE COMBINED SELECTION OF S1 AND S2 LINES
title_fullStr ALTERNATE COMBINED SELECTION OF S1 AND S2 LINES
title_full_unstemmed ALTERNATE COMBINED SELECTION OF S1 AND S2 LINES
title_sort alternate combined selection of s1 and s2 lines
description A plant breeding method called Alternate combined selection of S1 and S2 lines (SCA) is proposed and described, including its genetic response. It alternates one cycle of combined selection of S1 lines (SCS1) with one cycle of combined selection of S2 lines (SCS2), through two successive generations of self-pollination. One cycle of SCA requires three planting seasons: S1 lines development, evaluation and self-pollination on SCS1, and evaluationrecombination on SCS2. According to the derived genetic response (R) and comparing efficiencies per year with respect to the modified ear-to-row selection response(L), computed with the formula (RSCA-RL)/RL in populations with p=q=0.5, the SCA method was 1.47 times more efficient per year than L when the recombination of S2 lines is with a common pollinator, and 2.15 times higher when the recombination of S2 lines is plant to plant or by mass crossing at flowering.
publisher Colegio de Postgraduados
publishDate 1996
url https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1420
work_keys_str_mv AT benitezriquelmeignacio alternatecombinedselectionofs1ands2lines
AT benitezriquelmeignacio seleccioncombinadaalternantedelineass1ys2
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