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《Acta Agriculturae Boreali-Occidentalis Sinica》 2013-02
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Analysis of Heterosis of Winter Brassica rapa in Gansu Province,Northern China

ZHAO Caixia,SUN Wancang and WU Junyan(Gansu Provincial Key Laboratory of Arid land Crop Sciences,Lanzhou 730070,China)  
Twelve hybrids produced by 9 parents were used to analyze heterosis of winter rapeseed.The results showed that cold tolerance,agronomic traits and yield potentiality had higher heterosis,but there were significant differences among different combinations.Compared with the parents,hybrids had better cold tolerance represented by winter survival rates;plant height and number of branches had significant heterosis and the average of over-high parent heterosis rate was 3.72%(0.34%-14.29%) for plant height and 8.56%(0.00%-18.75%) for number of branches.For the yield components,8 crosses gave 12.79% of over-high parent heterosis for siliques per plant.Four crosses showed over-high parent heterosis on seeds per silique,but only 3 crosses showed over-high parent heterosis on 1 000-seed mass(0.00%-1.68%).Eleven' crosses gave 22.34% of over-high parent heterosis for seed yield on average.The results showed that winter survival rates,plant height and numbers of branches had significant heterosis,The heterosis of siliques number per plant made the biggest contribution to heterosis of seed yield,while 1 000-seed mass and seeds per silique made little to seed yield.
【Fund】: 国家现代农业产业技术体系(北方寒旱区冬油菜育种岗位科学家)(CARS-13);; 国家行业科技项目(北方旱寒区冬油菜北移集成技术研究与示范)(200903002-4);; 国家自然基金 芸芥自交亲和基因的克隆及功能分析(3ZS061-A25-076);; 国家863计划专项(强优势油菜杂交种的创制与应用)(2011AA10A104)
【CateGory Index】: S565.4
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