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Acta Agron Sin ›› 2013, Vol. 39 ›› Issue (04): 632-641.doi: 10.3724/SP.J.1006.2013.00632

• CROP GENETICS & BREEDING · GERMPLASM RESOURCES · MOLECULAR GENETICS • Previous Articles     Next Articles

Stability and Importance of Morphological Characteristics in Example Varieties Based on DUS Test

TANG Hao1,2,LIU Hong3,YU Han-Yong4,ZHANG Zhe-Feng5,XIAO Ying-Hui1,YANG Yi-Shan6,CHEN Li-Yun1   

  1. 1 Hunan Agricultural University, Changsha 410128, China; 2 Development Center for Science & Technology of Ministry of Agriculture, Beijing 100122, China; 3 South China Agricultural University, Guangzhou 510642, China; 4 China National Rice Research Institute, Hangzhou 310006, China; 5 Sichuan Academy of Agricultural Sciences, Chengdu 610066, China; 6 Hunan Hybrid Rice Research Center, Changsha 410125, China
  • Received:2012-10-22 Revised:2012-12-11 Online:2013-04-12 Published:2013-01-28

Abstract:

In order to further improve the accuracy of distinctness, uniformity and stability (ab. DUS) test of rice varieties, the AMMI model was used to analyse the stability and Random Forest algorithm was used to evalue the importance for 50 charcacteristics of 49 rice example varieties listed in DUS test guideline. The results showed that stability is largely different amony different characteristics, and visual characteristics are highly stable for main qualitive characteristics and pseudo-qualitive characteristics, and measurement characteristics had low stability for quantitative characteristics . On the whole, the importance parameter difference was very big among different characteristics, which is larger for measurement characteristics, and relatively smaller for visual characteristics. Some characteristics with low stability and low importance could be excluded from DUS guideline, for example “panicle: exsertion”, “panicle: type”, “panicle: attitude”, “Spikelet: pubescence of lemma”, “leaf: pubescence”, while those with low stability, but very important in practice, for example “time of maturity” and “time of heading” could be only in the location of applicants tested to avoid misjustice and use example varieties for correction.

Key words: Rice, DUS test, Visual observation, Measurement observation, Stability, Importance

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