Rossi, Nicola; Powell, Wayne; Mackay, Ian J.; Hickey, Lee; Maurer, Andreas; Pillen, Klaus; Halliday, Karen; Sharma, Rajiv Investigating the genetic control of plant development in spring barley under speed breeding conditions Artikel In: THEORETICAL AND APPLIED GENETICS, Bd. 137, Nr. 5, 2024, ISSN: 0040-5752. @article{WOS:001220771900001,
title = {Investigating the genetic control of plant development in spring barley under speed breeding conditions},
author = {Nicola Rossi and Wayne Powell and Ian J. Mackay and Lee Hickey and Andreas Maurer and Klaus Pillen and Karen Halliday and Rajiv Sharma},
doi = {10.1007/s00122-024-04618-9},
issn = {0040-5752},
year = {2024},
date = {2024-05-01},
urldate = {2024-05-01},
journal = {THEORETICAL AND APPLIED GENETICS},
volume = {137},
number = {5},
abstract = {Key message This study found that the genes, PPD-H1 and ELF3, control
the acceleration of plant development under speed breeding, with
important implications for optimizing the delivery of climate-resilient
crops.Abstract Speed breeding is a tool to accelerate breeding and
research programmes. Despite its success and growing popularity with
breeders, the genetic basis of plant development under speed breeding
remains unknown. This study explored the developmental advancements of
barley genotypes under different photoperiod regimes. A subset of the
HEB-25 Nested Association Mapping population was evaluated for days to
heading and maturity under two contrasting photoperiod conditions: (1)
Speed breeding (SB) consisting of 22 h of light and 2 h of darkness, and
(2) normal breeding (NB) consisting of 16 h of light and 8 h of
darkness. GWAS revealed that developmental responses under both
conditions were largely controlled by two loci: PPDH-1 and ELF3. Allelic
variants at these genes determine whether plants display early flowering
and maturity under both conditions. At key QTL regions, domesticated
alleles were associated with late flowering and maturity in NB and early
flowering and maturity in SB, whereas wild alleles were associated with
early flowering under both conditions. We hypothesize that this is
related to the dark-dependent repression of PPD-H1 by ELF3 which might
be more prominent in NB conditions. Furthermore, by comparing
development under two photoperiod regimes, we derived an estimate of
plasticity for the two traits. Interestingly, plasticity in development
was largely attributed to allelic variation at ELF3. Our results have
important implications for our understanding and optimization of speed
breeding protocols particularly for introgression breeding and the
design of breeding programmes to support the delivery of
climate-resilient crops.},
keywords = {Cereal Crops, Developmental Genetics, Plant Breeding, Plant genetics, Quantitative trait},
pubstate = {published},
tppubtype = {article}
}
Key message This study found that the genes, PPD-H1 and ELF3, control
the acceleration of plant development under speed breeding, with
important implications for optimizing the delivery of climate-resilient
crops.Abstract Speed breeding is a tool to accelerate breeding and
research programmes. Despite its success and growing popularity with
breeders, the genetic basis of plant development under speed breeding
remains unknown. This study explored the developmental advancements of
barley genotypes under different photoperiod regimes. A subset of the
HEB-25 Nested Association Mapping population was evaluated for days to
heading and maturity under two contrasting photoperiod conditions: (1)
Speed breeding (SB) consisting of 22 h of light and 2 h of darkness, and
(2) normal breeding (NB) consisting of 16 h of light and 8 h of
darkness. GWAS revealed that developmental responses under both
conditions were largely controlled by two loci: PPDH-1 and ELF3. Allelic
variants at these genes determine whether plants display early flowering
and maturity under both conditions. At key QTL regions, domesticated
alleles were associated with late flowering and maturity in NB and early
flowering and maturity in SB, whereas wild alleles were associated with
early flowering under both conditions. We hypothesize that this is
related to the dark-dependent repression of PPD-H1 by ELF3 which might
be more prominent in NB conditions. Furthermore, by comparing
development under two photoperiod regimes, we derived an estimate of
plasticity for the two traits. Interestingly, plasticity in development
was largely attributed to allelic variation at ELF3. Our results have
important implications for our understanding and optimization of speed
breeding protocols particularly for introgression breeding and the
design of breeding programmes to support the delivery of
climate-resilient crops. |
