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Variation for Photoperiod and Temperature Sensitivity in the Global Mini Core Collection of Sorghum

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Relation http://oar.icrisat.org/11886/
https://doi.org/10.3389/fpls.2021.571243
doi:10.3389/fpls.2021.571243
 
Title Variation for Photoperiod and Temperature Sensitivity in the Global Mini Core Collection of Sorghum
 
Creator Upadhyaya, H D
Vetriventhan, M
Azevedo, V C R
 
Subject Crop Physiology
Sorghum
Gene Bank
 
Description Information on photoperiod and temperature sensitivity of sorghum germplasm is
important to identify appropriate sources for developing cultivars with a broad
adaptation. The sorghum mini core collection consisting of 242 accessions along
with three control cultivars were evaluated for days to 50% flowering (DFL) and plant
height in two long-day rainy and two short-day post-rainy seasons, and for grain
yield and 100-seed weight in the two post-rainy seasons. Differences in DFL and
cumulative growing degree days (CGDD) in the rainy and post-rainy seasons were used
to classify the accessions for photoperiod and temperature sensitivity. Results revealed
18 mini core landraces as photoperiod and temperature insensitive (PTINS), 205 as
photoperiod sensitive and temperature insensitive (PSTINS), and 19 as photoperiod
and temperature-sensitive (PTS) sources. The 19 PTS sources and 80 PSTINS sources
took less DFL in the long-day rainy seasons than in the short-day post-rainy season
indicating their adaptation to the rainy season and a possible different mechanism than
that trigger flowering in the short-day sorghums. In all three groups, several accessions
with desirable combinations of agronomic traits were identified for use in the breeding
programs to develop climate-resilient cultivars and for genomic studies to identify genes
responsible for the photoperiod and temperature responses.
 
Publisher Frontiers Media
 
Date 2021-06
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11886/1/fpls-12-571243.pdf
Upadhyaya, H D and Vetriventhan, M and Azevedo, V C R (2021) Variation for Photoperiod and Temperature Sensitivity in the Global Mini Core Collection of Sorghum. Frontiers in Plant Science (TSI), 12. pp. 1-15. ISSN 1664-462X