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Acta Prataculturae Sinica ›› 2016, Vol. 25 ›› Issue (3): 108-119.DOI: 10.11686/cyxb2015103

• Orginal Article • Previous Articles     Next Articles

Analysis of botanical traits and self-compatibility in winter rapeseed Brassica napus and Brassica rapa and F1 hybrid populations

ZHAO Yan-Ning1, MI Chao1, SUN Wan-Cang1, *, LIU Zi-Gang1, WU Jun-Yan1, FANG Yan1, LI Xue-Cai1, LIU Hai-Qing1, Dong Yun2   

  1. 1.Improvement and Key Laboratory of Crop Genetics and Germplasm Enhancement, Gansu Province Key Laboratory of Arid Land Crop Sciences, Rapeseed Engineering Research Center of Gansu Province, Gansu Province, Lanzhou 730070, China;
    2.Crop Institute of Gansu Academy of Agriculture Science, Gansu Province, Lanzhou 730070, China
  • Received:2015-02-25 Online:2016-03-20 Published:2016-03-20

Abstract: Changes in cold tolerance, botanical morphology (BM), growth habit (GH) and self-compatibility (SC) of Brassica napus, Brassica rapa and their hybrids were compared. Vision (B. napus), Longyou 9 (B. rapa) and their reciprocal crosses progenies were used in the study. The cold tolerance, BM, GH and SC of the hybrids were evaluated by comparing BM, winter performance, bagging selfing and pollen-stigma interactions with that of the parent lines. The BM and dry matter accumulation of F1 hybrids (Vision×Longyou 9) was intermediate while GH was similar to B. rapa. Winter survival of F1 plants in reciprocal crosses were 68.75% and 65.00%. Root length of reciprocal crosses in F1 plants were 14.83 and 14.30 cm. Crown diameter of F1 hybrids from reciprocal crosses were 6.08 and 5.67 mm. The SC was highest in Vision and declined in order; F1 (Vision×Longyou 9), F1 (Longyou 9×Vision), Longyou 9 with SC indices being 20.83, 1.09, 1.06 and 0.87, respectively. The self-compatibility of parents and F1 plants was consistent with the level of pollen germination. The cold tolerance of hybrids was stronger than B. napus but weaker than B. rapa. The F1 hybrids were self-compatible, but the degree of the SC was much less than that of B. napus.