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Phenotypic variation and sampling for leaf conductance in wheat (Triticum aestivum L.) breeding populations

Published on Oct 1, 2001in Euphytica1.53
· DOI :10.1023/A:1012035720423
G. J. Rebetzke27
Estimated H-index: 27
(CSIRO: Commonwealth Scientific and Industrial Research Organisation),
Anthony G. Condon34
Estimated H-index: 34
(CSIRO: Commonwealth Scientific and Industrial Research Organisation)
+ 1 AuthorsJ.J. Read1
Estimated H-index: 1
(ANU: Australian National University)
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Abstract
Recent studies have demonstrated an association between increased stomatal conductance and genetic improvement of yield potential of wheat. However, the sensitivity of stomata to changes in environmental conditions makes screening of large populations for leaf conductance difficult in a breeding program. A rapid and inexpensive viscous air-flow porometer has recently been developed to accurately measure leaf conductance in amphistomatous species. This porometer has potential to assist in the rapid screening of cereal populations aimed at identifying families with high leaf conductance and potentially high yield potential. In this study, random F2:4, BC2F2:4, and BC2F5:7 progeny from crosses between low and high stomatal conductance wheat varieties were assessed for leaf conductance using the viscous air-flow porometer in two field environments. Significant (p< 0.05) genotypic variation was observed for leaf conductance in both the F2:4 and BC2F2:4 populations, and there was some evidence for transgressive segregation towards higher conductance in the BC2F2:4 population. Phenotypic distributions for leaf conductance among progeny were approximately normal suggesting quantitative inheritance, while heritability on a family-mean basis ranged between 26 and 73% indicating potential for genetic gain from selection for leaf conductance. A relatively greater leaf-to-leaf sampling variance highlighted the need for measurements on more leaves per plot in order to increase the precision of comparisons among family means, especially in early generations. Increasing the number of leaves sampled in each plot should pose little problem for plant breeders because successive leaves can be measured rapidly (ca. five leaves/minute) with the viscous air-flow porometer.
  • References (18)
  • Citations (26)
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References18
Newest
#1G. J. Rebetzke (CSIRO: Commonwealth Scientific and Industrial Research Organisation)H-Index: 27
#2John J. Read (MSU: Mississippi State University)H-Index: 20
Last.H. M. Rawson (CSIRO: Commonwealth Scientific and Industrial Research Organisation)H-Index: 1
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#1Zhenmin Lu (UCLA: University of California, Los Angeles)H-Index: 12
#2Richard G. Percy (ARS: Agricultural Research Service)H-Index: 25
Last.Eduardo Zeiger (UCLA: University of California, Los Angeles)H-Index: 32
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#1Richard G. Percy (ARS: Agricultural Research Service)H-Index: 25
#2Zhenmin Lu (UCLA: University of California, Los Angeles)H-Index: 12
Last.Eduardo Zeiger (UCLA: University of California, Los Angeles)H-Index: 32
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Cited By26
Newest
#1Viridiana Silva‐Pérez (ANU: Australian National University)H-Index: 2
#2Gemma Molero (CIMMYT: International Maize and Wheat Improvement Center)H-Index: 14
Last.John R. Evans (ANU: Australian National University)H-Index: 60
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#1Raseela Ashraf (Pir Mehr Ali Shah Arid Agriculture University)
#2Fayyaz-ul-Hassan (Pir Mehr Ali Shah Arid Agriculture University)H-Index: 3
Last.Ghulam Shabbir (Pir Mehr Ali Shah Arid Agriculture University)H-Index: 1
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#1Giosuè Panio (Consiglio per la ricerca e la sperimentazione in agricoltura)H-Index: 3
#2Rosella Motzo (Consiglio per la ricerca e la sperimentazione in agricoltura)H-Index: 19
Last.Pasquale De Vita (Consiglio per la ricerca e la sperimentazione in agricoltura)H-Index: 18
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#1Greg J. Rebetzke (CSIRO: Commonwealth Scientific and Industrial Research Organisation)H-Index: 31
#2Allan R. Rattey (CSIRO: Commonwealth Scientific and Industrial Research Organisation)H-Index: 11
Last.Anthony G. Condon (CSIRO: Commonwealth Scientific and Industrial Research Organisation)H-Index: 34
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#1Pushpendra K. Gupta (Chaudhary Charan Singh University)H-Index: 27
#2H. S. Balyan (Chaudhary Charan Singh University)H-Index: 29
Last.P. L. KulwalH-Index: 18
view all 4 authors...
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