Breeding of Chamaecrista rotundifolia CV. Minyu No.1 by 60Cy γ-rays irradiation

Chamaecrista rotundifoli CV. Minyu No.1 was selected and bred by Agricultural Ecology Institute of Fujian Academy of Agricultural Sciences, which was an improved mutant strain from Chamaecrista rotundifolia cv. Minyin through 60Cs γ-rays irradiation in 2002. It was passed the evaluation of National Grass Variety Approval Committee in 2011. Variety comparison trial, regional test and productive trial were carried out during 2005 to 2010. The results showed that the hay yield was up to 10000 ∼ 15000 kg/hm2, which was 20.70% higher than that of C. rotundifolia cv. Minyin (the control group) (P<0.01). The seed yield reached 220 ∼ 320 kg/hm2, which was increased by 9.01% compared with the control group (P>0.05). The crude protein content was 19.15% when harvested at initial blooming stage. In summary, C. rotundifoli CV. Minyu No.1 was suitable to plant in tropical and sub-tropical red soil regions in Southern China. (authors)