doi:

DOI: 10.3724/SP.J.1006.2018.00208

Acta Agronomica Sinica (作物学报) 2018/44:2 PP.208-217

Regeneration Capacity Evaluation of Some Largely Popularized Wheat Varieties in China


Abstract:
Strong genotype dependence exists in wheat doubling haploid and genetic engineering breeding, in which high regeneration ability is a main restrain. In this study, we evaluated the regeneration abilities of various explants of 24 commercial popularized wheat varieties and a new breeding line (CB037) with high powdery mildew resistance. The explants used in the two-year experiment were anther, immature embryo, and mature embryo. The regeneration potential was assessed based on callus induction rate, callus differentiation rate, and shoot induction rate. The plantlet regeneration rates of the all genotypes tested were 0-41.75% for anther culture, 2.25%-531.92% for immature embryo culture, and 3.24%-84.34% for mature embryo culture, showing significant differences among genotypes. Generally, immature embryos had stronger regeneration ability (119.79%) than mature embryos (36.23%) and anthers (4.91%). Among all the used genotypes, CB037 showed the highest regeneration rates for the three explant types. Lunxuan 987, Yangmai 16, Neimai 836, Kenong 199, Xinchun 6, Zhengmai 366, Zhengmai 9023, Xindong 20, Yannong 19, and Chuanmai 42 exhibited ideal regeneration abilities in immature embryo culture; Xinchun 6, Jingdong 8, Shimai 4185, Kenong 199, and Luanxun 987 performed good in mature embryo culture; and Shimai 4185 and Han 6172 were characterized with high regeneration rate of green plantlet in anther culture. Plant regeneration efficiency of wheat was closely associated with genotype and explant type. The same explant type from different genotypes showed significantly different regeneration abilities, and different explants of the same genotype showed different regeneration abilities. However, there was no correlation among regeneration abilities of the three types of explants. The selected genotypes with high regeneration potential are recommended for application in genetic and cell engineering breeding of wheat.

Key words:wheat,anther,immature embryo,mature embryo,tissue culture

ReleaseDate:2018-03-08 10:13:39



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