Association analysis of photoperiodic flowering time genes in west and central African sorghum [Sorghum bicolor (L.) Moench]

被引：19

作者：

Bhosale, Sankalp U. ^{[1
]}

Stich, Benjamin ^{[2
]}

Rattunde, H. Frederick W. ^{[3
]}

Weltzien, Eva ^{[3
]}

Haussmann, Bettina I. G. ^{[1
,4
]}

Hash, C. Thomas ^{[4
,5
]}

Ramu, Punna ^{[5
]}

Cuevas, Hugo E. ^{[6
,7
]}

Paterson, Andrew H. ^{[6
]}

Melchinger, Albrecht E. ^{[1
]}

Parzies, Heiko K. ^{[1
]}

机构：

[1] Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, Germany

[2] Max Planck Inst Plant Breeding Res, D-50829 Cologne, Germany

[3] Int Crops Res Inst Semiarid Trop ICRISAT Bamako, Bamako, Mali

[4] ICRISAT Sadore, Niamey, Niger

[5] ICRISAT Patancheru, Hyderabad 502324, Andhra Pradesh, India

[6] Univ Georgia, Plant Genome Mapping Lab, Athens, GA 30602 USA

[7] Agr Res Serv, USDA, Trop Agr Res Stn, Mayaguez, PR 00680 USA

来源：

BMC PLANT BIOLOGY | 2012年 / 12卷

关键词：

NATURAL-SELECTION; CIRCADIAN CLOCK; BLUE-LIGHT; ARABIDOPSIS; PHYTOCHROME; MATURITY; PROTEIN; CRYPTOCHROMES; POLYMORPHISM; PATTERNS;

D O I：

10.1186/1471-2229-12-32

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Background: Photoperiod-sensitive flowering is a key adaptive trait for sorghum (Sorghum bicolor) in West and Central Africa. In this study we performed an association analysis to investigate the effect of polymorphisms within the genes putatively related to variation in flowering time on photoperiod-sensitive flowering in sorghum. For this purpose a genetically characterized panel of 219 sorghum accessions from West and Central Africa was evaluated for their photoperiod response index (PRI) based on two sowing dates under field conditions. Results: Sorghum accessions used in our study were genotyped for single nucleotide polymorphisms (SNPs) in six genes putatively involved in the photoperiodic control of flowering time. Applying a mixed model approach and previously-determined population structure parameters to these candidate genes, we found significant associations between several SNPs with PRI for the genes CRYPTOCHROME 1 (CRY1-b1) and GIGANTEA (GI). Conclusions: The negative values of Tajima's D, found for the genes of our study, suggested that purifying selection has acted on genes involved in photoperiodic control of flowering time in sorghum. The SNP markers of our study that showed significant associations with PRI can be used to create functional markers to serve as important tools for marker-assisted selection of photoperiod-sensitive cultivars in sorghum.

引用

页数：10

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