Genetic control of B chromosome transmission rate in Zea mays ssp. mays (Poaceae)

We selected genotypes of high and low B chromosome transmission rate (TR) in a native race of maize (Pisingallo) from northwest Argentina. We made 20 female 0B x male 1B and 20 f.1B x m.0B crosses. The former (G0m) showed a large variation of B TR, with a mean of TR ± SE = 0.52 ± 0.06, ranging from...

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Autores principales: Rosato, M., Chiavarino, A.M., Naranjo, C.A., Puertas, M.J., Poggio, L.
Formato: JOUR
Materias:
B chromosome transmission rate
B chromosomes
genetic control of B transmission
maize
maize native races
Zea mays ssp. mays
Zea mays
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00029122_v83_n9_p1107_Rosato
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00029122_v83_n9_p1107_Rosato2023-10-03T13:54:38Z Genetic control of B chromosome transmission rate in Zea mays ssp. mays (Poaceae) Rosato, M. Chiavarino, A.M. Naranjo, C.A. Puertas, M.J. Poggio, L. B chromosome transmission rate B chromosomes genetic control of B transmission maize maize native races Zea mays ssp. mays Zea mays We selected genotypes of high and low B chromosome transmission rate (TR) in a native race of maize (Pisingallo) from northwest Argentina. We made 20 female 0B x male 1B and 20 f.1B x m.0B crosses. The former (G0m) showed a large variation of B TR, with a mean of TR ± SE = 0.52 ± 0.06, ranging from 0.17 to 0.98. In the latter (G0f) the mean was TR = 0.47 ± 0.02 ranging from 0.31 to 0.58. Plants showing the highest and the lowest TR were selected to constitute the progenitors of the G1 generations. We made 19 f.0B x m.2B crosses, studying 24-30 plants per cross. The TR of the high (H) and low (L) lines in G1m (G1mH and G1mL) significantly differed (TRH = 0.65 ± 0.03, TRL = 0.40 ± 0.01), indicating that the H and L lines are different groups. The large variation in male TR suggests that preferential fertilization of gametes carrying B chromosomes does not always occur. We also selected plants showing high and low TR in the progenies of f.1B x m.0B crosses (G0f), and made 24 f.1B x m.0B crosses, studying 23-30 plants per cross. The TRs of the H and L lines in G1f (G1fH and G1fL) were significantly different (TRH = 0.48 ± 0.025, TRL = 0.40 ± 0.02). The TRs in G0f and G1fL were significantly different (TR = 0.47 ± 0.02 and 0.40 ± 0.02, respectively), while this was not the case between G0f and G1fH. Our results demonstrate the existence of genotypes controlling B TR in this native population of maize. Fil:Rosato, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Chiavarino, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Naranjo, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Poggio, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00029122_v83_n9_p1107_Rosato
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic B chromosome transmission rate
B chromosomes
genetic control of B transmission
maize
maize native races
Zea mays ssp. mays
Zea mays
spellingShingle B chromosome transmission rate
B chromosomes
genetic control of B transmission
maize
maize native races
Zea mays ssp. mays
Zea mays
Rosato, M.
Chiavarino, A.M.
Naranjo, C.A.
Puertas, M.J.
Poggio, L.
Genetic control of B chromosome transmission rate in Zea mays ssp. mays (Poaceae)
topic_facet B chromosome transmission rate
B chromosomes
genetic control of B transmission
maize
maize native races
Zea mays ssp. mays
Zea mays
description We selected genotypes of high and low B chromosome transmission rate (TR) in a native race of maize (Pisingallo) from northwest Argentina. We made 20 female 0B x male 1B and 20 f.1B x m.0B crosses. The former (G0m) showed a large variation of B TR, with a mean of TR ± SE = 0.52 ± 0.06, ranging from 0.17 to 0.98. In the latter (G0f) the mean was TR = 0.47 ± 0.02 ranging from 0.31 to 0.58. Plants showing the highest and the lowest TR were selected to constitute the progenitors of the G1 generations. We made 19 f.0B x m.2B crosses, studying 24-30 plants per cross. The TR of the high (H) and low (L) lines in G1m (G1mH and G1mL) significantly differed (TRH = 0.65 ± 0.03, TRL = 0.40 ± 0.01), indicating that the H and L lines are different groups. The large variation in male TR suggests that preferential fertilization of gametes carrying B chromosomes does not always occur. We also selected plants showing high and low TR in the progenies of f.1B x m.0B crosses (G0f), and made 24 f.1B x m.0B crosses, studying 23-30 plants per cross. The TRs of the H and L lines in G1f (G1fH and G1fL) were significantly different (TRH = 0.48 ± 0.025, TRL = 0.40 ± 0.02). The TRs in G0f and G1fL were significantly different (TR = 0.47 ± 0.02 and 0.40 ± 0.02, respectively), while this was not the case between G0f and G1fH. Our results demonstrate the existence of genotypes controlling B TR in this native population of maize.
format JOUR
author Rosato, M.
Chiavarino, A.M.
Naranjo, C.A.
Puertas, M.J.
Poggio, L.
author_facet Rosato, M.
Chiavarino, A.M.
Naranjo, C.A.
Puertas, M.J.
Poggio, L.
author_sort Rosato, M.
title Genetic control of B chromosome transmission rate in Zea mays ssp. mays (Poaceae)
title_short Genetic control of B chromosome transmission rate in Zea mays ssp. mays (Poaceae)
title_full Genetic control of B chromosome transmission rate in Zea mays ssp. mays (Poaceae)
title_fullStr Genetic control of B chromosome transmission rate in Zea mays ssp. mays (Poaceae)
title_full_unstemmed Genetic control of B chromosome transmission rate in Zea mays ssp. mays (Poaceae)
title_sort genetic control of b chromosome transmission rate in zea mays ssp. mays (poaceae)
url http://hdl.handle.net/20.500.12110/paper_00029122_v83_n9_p1107_Rosato
work_keys_str_mv AT rosatom geneticcontrolofbchromosometransmissionrateinzeamayssspmayspoaceae
AT chiavarinoam geneticcontrolofbchromosometransmissionrateinzeamayssspmayspoaceae
AT naranjoca geneticcontrolofbchromosometransmissionrateinzeamayssspmayspoaceae
AT puertasmj geneticcontrolofbchromosometransmissionrateinzeamayssspmayspoaceae
AT poggiol geneticcontrolofbchromosometransmissionrateinzeamayssspmayspoaceae
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