נגישות
menu      
Advanced Search
Syntax
Search...
Volcani treasures
About
Terms of use
Manage
Community:
אסיף מאגר המחקר החקלאי
Powered by ClearMash Solutions Ltd -
Mass selection of wheat for grain filling without transient photosynthesis
Year:
1991
Source of publication :
Euphytica
Authors :
Golan, Gil
;
.
Shpiler, Lev
;
.
Sinmena, Bebi
;
.
Volume :
54
Co-Authors:
Blum, A., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Shpiler, L., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Golan, G., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Mayer, J., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Sinmena, B., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Facilitators :
From page:
111
To page:
116
(
Total pages:
6
)
Abstract:
Post-anthesis chemical desiccation of wheat (Triticum aestivum L.) plants in the field eliminates transtent photosynthesis by killing all green tissues, thus revealing the plant's capacity for grain filling from stored stem reserves, as the case is for post-anthesis stress such as drought or leaf diseases. This study was conducted to investigate whether mass selection for large kernels under chemical desiccation would lead to the improve ment of grain filling in the absence of transient photosynthesis. Six crosses of common spring wheat were subjected to three cycles of mass selection from F2 through F1 when selection was performed for large kernels by sieving grains from plants that were erther chemically desiccated after anthesis, or not (controls). The resulting 36 bulks (six crosses by three selection cycles by two selection environments) were compared with their respective F2 base populations, when tested with and without chemical desiccation. Selection for large kernels under potential conditions (without chemical desiccation) did not improve kernel weight under potnetial conditions, evidently because these materials were lacking in genetic variation for kernel weight under potential conditions. In four of the crosses, 3rd cycle selection for large kernels under potential conditions decreased kernel weight under chemical desiccation. On the other hand, selection for large kernels under chemical desiccation was effective in improving kernel weight and test weight under chemical desiccation, depending on the cross and the selection cycle, with no genetic shift in mean days to heading or mean plant height. Selection for large kernels under chemical desiccation was also effective in some cases in increasing kernel weight under potential conditions. The results are interpreted to show that selection under potential conditions and under chemical desiccation operate on two different sources for grain filling, namely transient photosynthesis and stem reserve utilization, respectively. In order to expose genetic variability for stem reserve utilization to selection pressure, transient photosynthesis must be eliminated, as done by chemical desiccation in this study. © 1991 Kluwer Academic Publishers.
Note:
Related Files :
drought resistance
Grain filling
Kernel
selection
Triticum aestivum
wheat
yield
Show More
Related Content
More details
DOI :
10.1007/BF00145637
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29775
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:49
Scientific Publication
Mass selection of wheat for grain filling without transient photosynthesis
54
Blum, A., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Shpiler, L., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Golan, G., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Mayer, J., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Sinmena, B., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Mass selection of wheat for grain filling without transient photosynthesis
Post-anthesis chemical desiccation of wheat (Triticum aestivum L.) plants in the field eliminates transtent photosynthesis by killing all green tissues, thus revealing the plant's capacity for grain filling from stored stem reserves, as the case is for post-anthesis stress such as drought or leaf diseases. This study was conducted to investigate whether mass selection for large kernels under chemical desiccation would lead to the improve ment of grain filling in the absence of transient photosynthesis. Six crosses of common spring wheat were subjected to three cycles of mass selection from F2 through F1 when selection was performed for large kernels by sieving grains from plants that were erther chemically desiccated after anthesis, or not (controls). The resulting 36 bulks (six crosses by three selection cycles by two selection environments) were compared with their respective F2 base populations, when tested with and without chemical desiccation. Selection for large kernels under potential conditions (without chemical desiccation) did not improve kernel weight under potnetial conditions, evidently because these materials were lacking in genetic variation for kernel weight under potential conditions. In four of the crosses, 3rd cycle selection for large kernels under potential conditions decreased kernel weight under chemical desiccation. On the other hand, selection for large kernels under chemical desiccation was effective in improving kernel weight and test weight under chemical desiccation, depending on the cross and the selection cycle, with no genetic shift in mean days to heading or mean plant height. Selection for large kernels under chemical desiccation was also effective in some cases in increasing kernel weight under potential conditions. The results are interpreted to show that selection under potential conditions and under chemical desiccation operate on two different sources for grain filling, namely transient photosynthesis and stem reserve utilization, respectively. In order to expose genetic variability for stem reserve utilization to selection pressure, transient photosynthesis must be eliminated, as done by chemical desiccation in this study. © 1991 Kluwer Academic Publishers.
Scientific Publication
You may also be interested in