Loss-of-Function Alleles of Heading date 1 (Hd1) Are Associated With Adaptation of Temperate Japonica Rice Plants to the Tropical Region

Adaptation of temperate rice varieties to tropical regions is impeded by extremely early flowering probably due to photoperiod change from long to short. However, constant breeding efforts led to development of temperate varieties adapted to tropical/subtropical regions, but the genetic factor under...

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Vydáno v:Frontiers in plant science Ročník 9; s. 1827
Hlavní autoři: Kim, Sung-Ryul, Torollo, Gideon, Yoon, Mi-Ra, Kwak, Jieun, Lee, Choon-Ki, Prahalada, G. D., Choi, Il-Ryong, Yeo, Un-Sang, Jeong, O-Young, Jena, Kshirod K., Lee, Jeom-Sig
Médium: Journal Article
Jazyk:angličtina
Vydáno: Switzerland Frontiers Media SA 10.12.2018
Frontiers Media S.A
Témata:
Adaptation
Alleles
Breeding
Cultivars
Data points
Flowering
flowering time
Genes
Genetic analysis
genetic diversity
Germplasm
Hd1
heading date
Plant Science
Rice
Single-nucleotide polymorphism
temperate japonica
Tropical environment
Tropical environments
tropics
Winter
Philippines
Japan
Taiwan
genetic diversity
Hd1
flowering time
tropics
rice
temperate japonica
heading date
ISSN:1664-462X, 1664-462X
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Shrnutí:Adaptation of temperate rice varieties to tropical regions is impeded by extremely early flowering probably due to photoperiod change from long to short. However, constant breeding efforts led to development of temperate varieties adapted to tropical/subtropical regions, but the genetic factor underlying this is still elusive. We analyzed the 45 diverse rice accessions and 12 tropical-adapted temperate lines for the allele types of seven major flowering genes , and and flowering time under three different field conditions in temperate and tropical locations. The accessions originated from the tropical/subtropical regions preferred the non-functional alleles of and not other flowering genes. The genetic effect analysis of each gene showed that only the functional caused early flowering in the tropical location. All 12 temperate breeding lines adapted to the tropics possessed the loss-of-function alleles of with no change of other flowering genes compared to common Korean temperate varieties. A phylogenetic analysis using 2,918 SNP data points revealed that the genome status of the 12 breeding lines were very similar to Korean temperate varieties. These results indicate that the functional alleles of temperate varieties induced extremely early flowering in the tropics and the non-functional alleles brought about the adaptation of temperate rice to tropical regions.
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Edited by: Giampiero Valè, Cereal Research Centre, CRA-CER, Italy
Reviewed by: Fabio Fornara, University of Milan, Italy; Fan Chen, Institute of Genetics and Developmental Biology (CAS), China; Yongzhong Xing, Huazhong Agricultural University, China
This article was submitted to Plant Breeding, a section of the journal Frontiers in Plant Science
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2018.01827