Identification of stable QTLs causing chalk in rice grains in nine environments

Zhao, Xiangqian, Daygon, Venea D., McNally, Kenneth L., Hamilton, Ruaraidh Sackville, Xie, Fangming, Reinke, Russell F. and Fitzgerald, Melissa A. (2015) Identification of stable QTLs causing chalk in rice grains in nine environments. Theoretical and Applied Genetics, 129 1: 141-153. doi:10.1007/s00122-015-2616-8

Author Zhao, Xiangqian
Daygon, Venea D.
McNally, Kenneth L.
Hamilton, Ruaraidh Sackville
Xie, Fangming
Reinke, Russell F.
Fitzgerald, Melissa A.
Title Identification of stable QTLs causing chalk in rice grains in nine environments
Journal name Theoretical and Applied Genetics   Check publisher's open access policy
ISSN 0040-5752
Publication date 2015-10-24
Sub-type Article (original research)
DOI 10.1007/s00122-015-2616-8
Open Access Status Not Open Access
Volume 129
Issue 1
Start page 141
End page 153
Total pages 13
Place of publication Heidelberg, Germany
Publisher Springer
Collection year 2016
Language eng
Formatted abstract
Key message: A novel QTL cluster for chalkiness on Chr04 was identified using single environment analysis and joint mapping across 9 environments in Asia and South American. QTL NILs showed that each had a significant effect on chalk.

Abstract: Chalk in rice grains leads to a significant loss in the proportion of marketable grains in a harvested crop, leading to a significant financial loss to rice farmers and traders. To identify the genetic basis of chalkiness, two sets of recombinant inbred lines (RILs) derived from reciprocal crosses between Lemont and Teqing were used to find stable QTLs for chalkiness. The RILs were grown in seven locations in Asia and Latin American and in two controlled environments in phytotrons. A total of 32 (21) and 46 (22) QTLs for DEC and PGWC, most of them explaining more than 10 % of phenotypic variation, were detected based on single environment analysis in T/L (L/T) population, respectively. Seven (2) and 7 (3) QTLs for DEC and PGWC were identified in the T/L (L/T) population using joined analysis across all environments, respectively. Six major QTLs clusters were found on five chromosomes: 1, 2, 4, 5 and 11. The biggest cluster at id4007289-RM252 on Chr04 was a novelty, including 16 and 4 QTLs detected by single environment analysis and joint mapping across all environments, respectively. The detected digenic epistatic QTLs explained up to 13 % of phenotypic variation, suggesting that epistasis play an important role in the genetic control of chalkiness in rice. QTL NILs showed that each QTL cluster had a significant effect on chalk. These chromosomal regions could be targets for MAS, fine mapping and map-based cloning for low chalkiness breeding.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Agriculture and Food Sciences
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
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