Quantitative effects of the genes Lf, Sn, E, and Hr on time to flowering in pea (Pisum sativum L.)

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dc.contributor.authorAlcalde, J.A.
dc.contributor.authorWheeler, T.R.
dc.contributor.authorSummerfield, R.J.
dc.contributor.authorNorero, A.L.
dc.date.accessioned2024-01-10T13:16:57Z
dc.date.available2024-01-10T13:16:57Z
dc.date.issued1999
dc.description.abstractFlowering time in pea (Pisum sativum L.) is determined by genetically controlled responses to photoperiod and temperature. To investigate these responses, 11 lines homozygous for the flowering genes Lf, Sn, E, and Hr were grown under contrasting semi-controlled photothermal environments and the durations (d) from sowing to first flower (f) were recorded. The effects of the four genes were quantified using a two-plane photothermal model which linearly relates the rate of progress from sowing to flowering (1/f) with the mean pre-flowering values of temperature (T) and/or photoperiod (P), based on 1/f=a+bT (when P is longer than the critical photoperiod, P,) and 1/f=a'+b'T+c'P (when P<P-c). The main effect of Lf alleles was on temperature sensitivity (b) when P > P-c, which increased in the sequence Lf(d)<Lf<lf<lf(a). Gene Hr, when together with Sn, increased photoperiod sensitivity (c') and reduced the intercept (a') when P<P-c. Allele sn determined a single plane response to temperature alone (i.e. a day-neutral response), Gene E, when present with If Sn, increased 1/f in both the thermal (P>P-c) and photothermal (P less than or equal to P-c) domains, mainly by increasing a and b', respectively. Variations in the coefficients of the thermal and photothermal responses determined that the critical photoperiod varied with temperature in all photoperiod-sensitive genotypes. A common base temperature of 0.2 degrees C was determined amongst Day-Neutral Class genotypes (sn) and thermal time from sowing to flowering increased in the sequence If(a) < If <Lf < Lf(d). lntra-Class variations attributed to the Lf alleles were also detected in the Late (Sn hr) and Late High Response (Sn Hr) Classes. The linear photothermal model provided a sound basis for studying the quantitative effects of flowering genes in pea.
dc.format.extent10 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1093/jexbot/50.340.1691
dc.identifier.issn0022-0957
dc.identifier.urihttps://doi.org/10.1093/jexbot/50.340.1691
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78625
dc.identifier.wosidWOS:000083652400009
dc.information.autorucAgronomía e Ing. Forestal;Alcalde J;S/I;59411
dc.issue.numero340
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final1700
dc.pagina.inicio1691
dc.publisherOXFORD UNIV PRESS
dc.revistaJOURNAL OF EXPERIMENTAL BOTANY
dc.rightsacceso restringido
dc.subjecttemperature
dc.subjectphotoperiod
dc.subjectflowering genes
dc.subjectMaturity Classes
dc.subjectmodels
dc.subjectPHOTOPERIOD
dc.subject.ods02 Zero Hunger
dc.subject.ods13 Climate Action
dc.subject.odspa02 Hambre cero
dc.subject.odspa13 Acción por el clima
dc.titleQuantitative effects of the genes Lf, Sn, E, and Hr on time to flowering in pea (Pisum sativum L.)
dc.typeartículo
dc.volumen50
sipa.codpersvinculados59411
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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