Breeding for cold‐tolerant lines of Stylosanthes guianensis in southern China
Stylosanthes guianensis is an important forage legume with high yield and quality,acidity tolerance,and excellent adaptation to low fertility soil in tropical and subtropical areas worldwide.It has also been used as a cover crop in agricultural farming, grown as green manure, cut for either fresh fodder or hay, and sown to rehabilitate the soil fertility of mine site.The low temperature in winter is a key factor limiting its growth and production in the subtropical regions.In order to induce and select chilly‐tolerant mutants of S.guianensis,a total of fifty‐eight thousands seeds of CIANT 184 were irradiated with gamma‐ray at dosage of 400,420,440,460,500,600,700 Gy, respectively, in 2003. The seedlings were exposed to 2-3℃ in growth chambers for 3 days as chilling treatment.The surviving plants were maintained and subjected to a second round of selection after 3 months.M2 and M3 plants were selected in 2004 and 2005, respectively, like the M1 plants.Five mutants with increased chilly tolerance and ten dwarf mutants were selected.
breeding cold tolerance Stylosanthes guianensis
Zhenfei Guo Huashan Tang Guozheng Xie Niu Yuejing Youguang Chen Shaoyun Lu
Biotechnology Laboratory for Forages and Turfgrass,College of Life Science,South China Agricultural Biotechnology Laboratory for Forages and Turf grass,College of Life Science,South China Agricultural
国际会议
呼和浩特
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）