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Acta Agron Sin ›› 2014, Vol. 40 ›› Issue (12): 2203-2209.doi: 10.3724/SP.J.1006.2014.02203

• RESEARCH NOTES • Previous Articles    

Screening of Germplasm with Resistance to Pod Shattering in Rapeseed (Brassica napus L.)

DONG Jun-Gang,DONG Zhen-Sheng,MENG Qian,ZHANG Bo   

  1. College of Agronomy, Northwest A&F University, Yangling 712100, China
  • Received:2014-03-13 Revised:2014-09-16 Online:2014-12-12 Published:2014-10-16


Shattering resistance is an important trait for rapeseed varieties suitable for mechanical harvesting, therefore screening of germplasm with pod shattering resistance is the basic work for the breeding of shattering resistance. In the present paper, we employed two methods, including random impact test (RIT) and shattering percentage test in the field, to evaluate pod shattering resistance of 75 accessions of B. napus. These accessions displayed wide variation in shattering resistance index (SRI) and shattering percentage (SP) in the field, which ranged from 0.01 to 0.70 with the variance coefficient (CV) of 70.70% for SRI, and from 1.58% to 55.51% with CV of 62.53% for SP in the field. The simple correlation analysis showed there was no correlation between pod SRI and SP in the field when all accessions included. However, for the accessions with strong or weak shattering resistance, there was no different between two methods, except for the accessions with the shattering resistance between strong and weak ones. The SP and the wall thickness of pod had significantly negative correlation (r = −0.429), pod SRI and the wall thickness of pod had significantly positive correlation (r = 0.687). Thus, the pod wall thickness can be used as an auxiliary index to screen shatter resistant germplasm. A germplasm Ny with high pod shattering resistance was identified in this study. Ny has thicker wall and smoother surface of pod. The shattering percentage of Ny was 7.74% under adverse condition (two weeks after the maturity), and 1.58% under normal condition (one week after maturity). The pod SRI of Ny was 0.70 in 2011 and 0.48 in 2013, higher than that of rest materials. Ny will be a valuable resource for rapeseed breeding for pod shattering resistance in the future.

Key words: Brassica nupus L, Pod shattering resistance, Germplasm screening

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