木豆胞质雄性不育系柱头活力研究  

Study on Stigma Receptivity of CMS Lines of Pigeonpea [Cajanus cajan(L.) Millsp]

作　　者：Dalvi V.A. 罗高玲[1] 罗瑞鸿[1] 李杨瑞[1] Saxena K.B. 

机构地区：[1]广西农业科学院广西作物遗传改良生物技术重点开放实验室,广西南宁530007 [2]国际半干旱热带地区作物研究所(ICRI-SAT)

出　　处：《西南农业学报》2010年第2期480-482,共3页Southwest China Journal of Agricultural Sciences

基　　金：广西农业科学院科技发展基金项目[2005010(Z)]

摘　　要：在中国南部地区南宁市(位于北纬22°49′、东经107°45′)大田生产条件下对2个木豆胞质雄性不育系ICPA2039和ICPA2043花期柱头活力进行研究,发现柱头活力始于开花前2d并维持至开花后4d,活力峰值出现在开花当日;人工授粉成荚率ICPA2039和ICPA2043分别为84.0%和82.0%;柱头活力期可通过花冠/花萼长度比来判定,ICPA2039和ICPA2043分别为2.75±0.075和2.60±0.283。柱头活力周期越长,获得虫媒授粉的异交机会越多,因此柱头活力周期是杂交育种成功率的一个重要技术参数,长的活力周期也是种子生产获得高产的保证。Stigma receptivity in pigeonpea [ Cajanus cajan （L.） Millsp. ] was studied using two male-sterile lines （ICPA 2039 and ICPA 2043 ） under field conditions. An experiment was conducted to observe the stigma receiptive period at Nanning （22°N, 108° E） ,in Southem China. The study revealed that the stigma was receptive 48 hours before flower opening and continued up to four days after flower opening. The peak stigma receiptivity was on the day of flower opening with 84 and 86 % pod set after hand pollination in the male-sterile lines ICPA 2039 and ICPA 2043 ,respectively. This floral stage was characterized by the corolla to calyx length ratio of 2.75 ± 0. 075 （ICPA 2039 ） and 2.60 ±0. 283 （ ICPA 2043 ）. The long time span of stigma receptivity in pigeonpea encourages insect-aided natural out-crossing. This information would help breeders to carry out hybridization activity with high success rates. Also the longe reeeiptivity would ensure more seed yield in isolated seed production blocks.

关 键 词：木豆 胞质雄性不育系 柱头活力 

分 类 号：S643.6[农业科学—蔬菜学]