QTL Mapping for Flowering Duration Stage of Chrysanthemum

ACTA HORTICULTURAE SINICA ›› 2011, Vol. 38 ›› Issue (8): 1557-1564.

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QTL Mapping for Flowering Duration Stage of Chrysanthemum

ZHANG Fei1,2，CHEN Fa-di1,*，FANG Wei-min1，CHEN Su-mei1，ZHANG Xian-yan1，and YIN Dong-mei1

1College of Horticulture，Nanjing Agricultural University，Nanjing 210095，China；2Research & Development Center of Flower，Zhejiang Academy of Agricultural Sciences，Hangzhou 311202，China

Received:2011-01-21 Revised:2011-07-18 Online:2011-08-25 Published:2011-08-25
Contact: CHEN Fa-di1,*

Abstract

Abstract: In this study，flowering duration stage of chrysanthemum were evaluated in 2008 and 2009，and QTL analysis was undertaken for this trait based on the two-year phenotypic data in 142 F1 mapping population derived from a cross between chrysanthemum cultivars of‘Yuhualuoying’and ‘Aoyunhanxiao’and their SRAP-based genetic linkage maps presently published. The QTL analysis based on the single-year data of 2008 and 2009 with Win QTL Cartographer v2.5 and composite interval mapping method indicated that 3 additive QTL were detected in 2008 but none in 2009. The three additive QTL scattered on linkage group Y20 and A42 of‘Yuhualuoying’map and A14 of‘Aoyunhanxiao’map，with a LOD value of 2.65–3.44 and contribution ratio for phenotypic variation ranging from 6.54% to 11.58% for each QTL. The QTL joint analysis based on the two-year phenotypic data of 2008 and 2009 with QTLNetwork v2.2 suggested that 2 additive-additive epsitatic QTL were mapped，with the similar contribution ratio and effect value to additive QTL detected by Win QTL Cartographer v2.5. In addition，there was interaction between the 2 epistatic QTL and environment.

Key words: chrysanthemum, F₁ population, flowering duration stage, QTL mapping

CLC Number:

S 682.1⁺1

ZHANG Fei;CHEN Fa-di;FANG Wei-min;CHEN Su-mei;ZHANG Xian-yan;and YIN Dong-mei. QTL Mapping for Flowering Duration Stage of Chrysanthemum[J]. ACTA HORTICULTURAE SINICA, 2011, 38(8): 1557-1564.

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QTL Mapping for Flowering Duration Stage of Chrysanthemum

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