Journal
JOURNAL OF CEREAL SCIENCE
Volume 55, Issue 3, Pages 305-311Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jcs.2012.01.003
Keywords
Rht; wheat; Hagberg falling number; Ppd
Categories
Funding
- UK Biotechnology and Biological Sciences Research Council (BBSRC) [BB/H018824/1]
- Felix Trust
- Eastern University, Sri Lanka
- Biotechnology and Biological Sciences Research Council [BB/H018824/1, BBS/E/J/000C0628, BB/I01800X/1] Funding Source: researchfish
- BBSRC [BB/H018824/1, BB/I01800X/1, BBS/E/J/000C0628] Funding Source: UKRI
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Near-isogenic lines varying for alleles for reduced height (Rht) and photoperiod insensitivity (Ppd-D1) in cv. Mercia (2005/6-2010/11; rht (tall), Rht-B1b, Rht-D1b, Rht-B1c, Rht8c+Ppd-D1a, Rht-D1c, Rht12) and cvs Mans Huntsman and Mans Widgeon (2007/8-2010/11; rht (tall). Rht-B1b, Rht-D1b, Rht-B1c, Rht-B1b+Rht-D1b, Rht-D1b+Rht-B1c) were compared at one field site, but within different systems ('organic', O, 2005/6-2007/8 v. 'intensive', I, 2005/6-2010/11). Further experiments at the site (2006/7-2008/9) compared 64 lines of a doubled-haploid (DH) population [Savannah (Rht-D1b) x Renesansa (Rht-8c+Ppd-D1a)]. Gibberellin (GA) insensitive dwarfing alleles (Rht-B1b; Rht-B1c; Rht-D1b; Rht-D1c) could reduce alpha-amylase activity and/or increase Hagberg falling number (HFN) but effects depended greatly on system, background and season. Only Rht-B1c increased grain dormancy despite producing plants taller than Rht-D1c. The GA-sensitive Rht8c+Ppd-D1a in Mercia was associated with reduced HFN but analysis of the DH population suggested this was more closely linked with Ppd-D1a, rather than Rht8c. The GA-sensitive severe-dwarfing allele Rht12 was associated with reduced HFN. Instability in HFN over season tended to increase with degree of dwarfing. There was a negative association between mean grain weight and HFN that was in addition to effects of Rht and Ppd-D1 allele. (C) 2012 Elsevier Ltd. All rights reserved.
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