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Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (8): 1582-1588.DOI: 10.3969/j.issn.1000-2561.2020.08.011

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Flowering and Fruiting Characteristics of Cassava Diploid and Its Autotetraploid

LI Hengrui1,CHEN Huixian1,YANG Haixia1,ZHANG Xiufen1,HE Wen1,LIANG Zhenhua1,GUO Suyun1,LIU Lianjun1,LI Ping1,CHEN Haisheng1,YAN Huabing2,**()   

  1. 1. Guangxi South Subtropical Agricultural Science Research Institute, Longzhou, Guangxi 532415, China
    2. Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China
  • Received:2019-10-14 Revised:2019-11-29 Online:2020-08-25 Published:2020-09-17
  • Contact: YAN Huabing


In this study, the diploid and its autotetraploid of ‘Xinxuan 048’ and ‘SC205’ were used as the test variety, and the differences of flowering and fruiting characteristics in the diploid and autotetraploid were compared using the method of fixed-plant observation to explore the effect of cassava chromosome doubling on flowering and fruiting characteristics, and provide scientific reference for the creation and identification of cassava polyploid material. The flowering and fruiting phenotypes of the tetraploids of the two cassava varieties were later than that of the diploid, and the size of the male and female flowers, anthers, fruits and seeds of the tetraploid was larger than that of the diploid. There were differences in anther distribution between different ploidy varieties of the two cassava varieties, and there were significant differences in the color of different ploidy female flowers in ‘Xinxuan 048’. Bisexual flowers appeared in the tetraploids of ‘Xinxuan 048’. There were also differences in the number of flowering and fruit setting between different ploidy cassava. The total single flower mass and total number of female or male flowers of the tetraploid of ‘Xinxuan 048’ were significantly larger than those of the diploid, but the difference of ‘SC205’ was not significant. Therefore, doubling the chromosome of cassava can delay the flowering time, increase the size of the reproductive organs, change the flower morphological characteristics and the number of male and female flowers and the total amount of flowers, but the change is different due to variety difference.

Key words: cassava, diploid, tetraploid, flowering and fruiting characteristics, difference

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