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Swedish spring wheat varieties with the rare high grain protein allele of NAM-B1 differ in leaf senescence and grain mineral content

Asplund, Linnéa and Bergkvist, Göran and Leino, Matti W. and Westerbergh, Anna and Weih, Martin (2013). Swedish spring wheat varieties with the rare high grain protein allele of NAM-B1 differ in leaf senescence and grain mineral content. PloS one. 8:3, 1-11
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Official URL: http://dx.doi.org/10.1371/journal.pone.0059704

Abstract

Some Swedish spring wheat varieties have recently been shown to carry a rare wildtype (wt) allele of the gene
NAM-B1, known to affect leaf senescence and nutrient retranslocation to the grain. The wt allele is believed to increase grain protein concentration and has attracted interest from breeders since it could contribute to higher grain quality and more nitrogen-efficient varieties. This study investigated whether Swedish varieties with the wt allele differ from varieties with one of the more common, non-functional alleles in order to examine the effect of the gene in a wide genetic background, and possibly explain why the allele has been retained in Swedish varieties. Forty varieties of spring wheat differing in NAM-B1 allele type were cultivated under controlled conditions. Senescence was monitored and grains were harvested and analyzed for mineral nutrient concentration. Varieties with the wt allele reached anthesis earlier and completed senescence faster than varieties with the non-functional allele. The wt varieties also had more ears, lighter grains and higher yields of P and K. Contrary to previous information on effects of the wt allele, our wt varieties did not have increased grain N concentration or
grain N yield. In addition, temporal studies showed that straw length has decreased but grain N yield has remained
unaffected over a century of Swedish spring wheat breeding. The faster development of wt varieties supports the hypothesis of NAM-B1 being preserved in Fennoscandia, with its short growing season, because of accelerated development conferred by the NAM-B1 wt allele. Although the possible effects of other gene actions were impossible to
distinguish, the genetic resource of Fennoscandian spring wheats with the wt NAM-B1 allele is interesting to investigate further for breeding purposes.

Authors/Creators:Asplund, Linnéa and Bergkvist, Göran and Leino, Matti W. and Westerbergh, Anna and Weih, Martin
Title:Swedish spring wheat varieties with the rare high grain protein allele of NAM-B1 differ in leaf senescence and grain mineral content
Series/Journal:PloS one (1932-6203)
Year of publishing :21 March 2013
Volume:8
Number:3
Page range:1-11
Publisher:PLOS ONE
Associated Programs and Other Stakeholders:SLU - Research Areas for the Future > Future Agriculture
ISSN:1932-6203
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:F Plant production > F30 Plant genetics and breeding
F Plant production > F61 Plant physiology - Nutrition
F Plant production > F62 Plant physiology - Growth and development
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Genetics (medical genetics to be 30107 and agricultural genetics to be 40402)
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Agrovoc terms:Breeding, Triticum aestivum, Growth, Experiments, Nutrients, Nitrogen
Keywords:NAM-B1, GPC-B1, breeding, Senescence, Triticum aestivum, Growth experiment, macronutrients, micronutrients, nitrogen
URN:NBN:urn:nbn:se:slu:epsilon-e-1883
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1883
Additional ID:
Type of IDID
DOI10.1371/journal.pone.0059704
Othere59704
ID Code:11146
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
NL - Faculty of Natural Resources and Agricultural Sciences (until 2013)
Department:(NL, NJ) > Dept. of Crop Production Ecology
(NL, NJ) > Dept. of Plant Biology and Forest Genetics (until 131231)
Deposited By: Linnéa Asplund
Deposited On:29 Apr 2014 12:34
Metadata Last Modified:28 Dec 2014 03:05

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