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| Construction of Watermelon Genetic Map and Fruit Shape Index QTL
Analysis |
| WANG Zhao-ji，GAO Peng，LUAN Fei-shi *，LIU Shi |
| （Horticulture College， Northeast Agricultural University， Harbin 150030， Heilongjiang， China） |
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Abstract Taking round shape watermelon line‘ Huayuanmuben’ as female parent and oval
shape line‘LSW-177’as male parent，we crossed them and obtained F2 population constructed with
180 single plants．We measured the length and width of the ripened watermelon〔Citrullus lanatus
（Thunb.）Matsum. et Nakai〕，obtained fruit shape index from the ratio between fruit length and width，
constructed the genetic map and analyzed the QTLs of relevant characteristics．The constructed genetic
map contains 45 SSR-markers belonging to 13 linkage groups．The covering genome length was 547.3
cM．The average distance between markers was 12.44 cM．The one QTL closely associated with fruit
shape index was located in the 3rd linkage group between MCPI-12 and CMN05_69．This QTL was
named as Fsi3.1．Its contribution rate was 2.8%，and its additive effect was negative，which showed
synergia additive effect in reducing fruit shape index.
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Received: 24 January 2013
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