Identification of quantitative trait loci for ABA sensitivity at seed germination and seedling stages in rice.

Identification of quantitative trait loci for ABA sensitivity at seed germination and seedling stages in rice. Research Abstract Details 

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Identification of quantitative trait loci for ABA sensitivity at seed germination and seedling stages in rice. Abstract Text:

Jun You,Qiang Li,Bing Yue,Wei-Ya Xue,Li-Jun Luo,Li-Zhong Xiong,

Abscisic acid (ABA) is one of the important plant hormones, which plays a critical role in seed development and adaptation to abiotic stresses. The sensitivity of rice (Oryza sativa L.) to exogenous ABA at seed germination and seedling stages was investigated in the recombinant inbred line (RIL) population derived from a cross between irrigated rice Zhenshan 97 and upland rice IRAT109, using relative germination vigor (RGV), relative germination rate (RGR) and leaf rolling scores of spraying (LRS) or culturing (LRC) with ABA as sensitivity indexes. The phenotypic correlation analysis revealed that only RGV at germination stage was positively correlated to ABA sensitivity at seedling stage. QTL detection using composite interval mapping (CIM) and mixed linear model was conducted to dissect the genetic basis of ABA sensitivity, and the single-locus QTLs detected by both methods are in good agreement with each other. Five single QTLs and six pairs of epistatic QTLs were detected for ABA sensitivity at germination stage. Eight single QTLs and five pairs of epistatic QTLs were detected for ABA sensitivity at seedling stage. Two QTLs were common between LRS and LRC; and one common QTL was detected for RGV, LRS and LRC simultaneously. These results indicated that both single and epistatic loci were involved in the ABA sensitivity in rice, and the genetic basis of ABA sensitivity at seed germination and seedling stage was largely different.

Identification of quantitative trait loci for ABA sensitivity at seed germination and seedling stages in rice. Publishing Authors By Initials

J You,Q Li,B Yue,WY Xue,LJ Luo,LZ Xiong,

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Identification of quantitative trait loci for ABA sensitivity at seed germination and seedling stages in rice. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Yi chuan xue bao = Acta genetica Sinica

VOLUME: 33

Page Numbers: 532-41

Journal Abbreviation: Yi Chuan Xue Bao

ISSN: 0379-4172

DAY: 27

MONTH: Jun

YEAR: 2006

Identification of quantitative trait loci for ABA sensitivity at seed germination and seedling stages in rice. Information

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LANGUAGE: eng

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AFFILIATION: National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, China.

Country: China

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MEDLINETA: Yi Chuan Xue Bao

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