Abscisic acid (ABA) concentration is a quantitatively inherited trait which plays a pivotal role in the response of plants to drought stress. A recent study identified 17 quantitative trait loci (QTLs) controlling bulk-leaf ABA concentration (L-ABA) in a maize (Zea mays L.) population of 80 F4 random families tested for two years under droughted field conditions. Sixteen of the QTL regions influencing L-ABA also harboured QTLs for one or more of the following traits: stomatal conductance, a drought sensitivity index, leaf temperature, leaf relative water content, anthesis-silking interval, and grain yield. The analysis of the effects of each QTL region on the investigated traits indicated that L-ABA mainly represented an indicator of the level of drought stress experienced by the plant at the time of sampling because an increase in L-ABA was most commonly associated with a decrease in both stomatal conductance and grain yield as well as an increase in leaf temperature. Opposite results were observed at one QTL region on chromosome 7 near the RFLP locus asg8. A model is presented to interpret these contrasting results in terms of pleiotropic effects.

QTL analysis of drought-related traits and grain yield in relation to genetic variation for leaf abscisic acid concentration in field-grown maize / Sanguineti M.C.; Tuberosa R.; Landi P.; Salvi S.; Maccaferri M.; Casarini E.; Conti S.. - In: JOURNAL OF EXPERIMENTAL BOTANY. - ISSN 0022-0957. - ELETTRONICO. - 50:337(1999), pp. 1289-1297. [10.1093/jxb/50.337.1289]

QTL analysis of drought-related traits and grain yield in relation to genetic variation for leaf abscisic acid concentration in field-grown maize

Sanguineti M. C.;Tuberosa R.;Landi P.;Salvi S.;Maccaferri M.;Casarini E.;Conti S.
1999

Abstract

Abscisic acid (ABA) concentration is a quantitatively inherited trait which plays a pivotal role in the response of plants to drought stress. A recent study identified 17 quantitative trait loci (QTLs) controlling bulk-leaf ABA concentration (L-ABA) in a maize (Zea mays L.) population of 80 F4 random families tested for two years under droughted field conditions. Sixteen of the QTL regions influencing L-ABA also harboured QTLs for one or more of the following traits: stomatal conductance, a drought sensitivity index, leaf temperature, leaf relative water content, anthesis-silking interval, and grain yield. The analysis of the effects of each QTL region on the investigated traits indicated that L-ABA mainly represented an indicator of the level of drought stress experienced by the plant at the time of sampling because an increase in L-ABA was most commonly associated with a decrease in both stomatal conductance and grain yield as well as an increase in leaf temperature. Opposite results were observed at one QTL region on chromosome 7 near the RFLP locus asg8. A model is presented to interpret these contrasting results in terms of pleiotropic effects.
1999
QTL analysis of drought-related traits and grain yield in relation to genetic variation for leaf abscisic acid concentration in field-grown maize / Sanguineti M.C.; Tuberosa R.; Landi P.; Salvi S.; Maccaferri M.; Casarini E.; Conti S.. - In: JOURNAL OF EXPERIMENTAL BOTANY. - ISSN 0022-0957. - ELETTRONICO. - 50:337(1999), pp. 1289-1297. [10.1093/jxb/50.337.1289]
Sanguineti M.C.; Tuberosa R.; Landi P.; Salvi S.; Maccaferri M.; Casarini E.; Conti S.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/901644
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