多叶型紫花苜蓿不同生育阶段多叶性状表达的观测分析
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摘要
对选育的多叶型紫花苜蓿群体SAG-Ma08不同生育阶段多叶率的表达水平进行了研究。结果表明:在结实期多叶表达率最小,仅14.89%;在现蕾期多叶表达率明显恢复达48.98%;在营养体生长期多叶表达恢复正常水平,达到55.21%;说明开花结实生育过程明显干扰制约多叶苜蓿多叶率的表达水平,这种干扰制约因素随生育生长阶段的转换,即获恢复。同时,对不同生育阶段的叶面积测定结果表明:在开花结实过程叶面积明显缩小,平均叶面积仅4.4783cm~2,在营养体生长期叶面积恢复到16.4401cm~2。可见,多叶型紫花苜蓿在开花结实生育阶段过程会同时明显制约多叶的表达和叶面积的生长。
In this study,we observed and analyzed the multi-leaf trait expression of multifoliate alfalfa population SAG-Ma08 in different growing stage,the results showed that the multi-leaf expression rate was the lowest in ripening period,only 14. 89%; and in squaring period,the expression rate recovered to 48. 98%; In vegetative period,multi-leaf expression was returned to a normal level,reached55. 21%; This means that the expression level of multi-leaf rate was obviously interfered with the process of flowering and fruiting,and this interference was restored with the transformation of the growth stage. Meanwhile,the leaf area of different growth stage determination results showed that the leaf area was significantly smaller during the flowering and fruiting stage,the average was 4. 4783 cm~2,but in vegetative period,this number recovered to 16. 4401 cm~2. So,both the multi-leaf trait expression and leaf area of multifoliate alfalfa were obviously restricted by the flowering and fruiting stage.
In this study,we observed and analyzed the multi-leaf trait expression of multifoliate alfalfa population SAG-Ma08 in different growing stage,the results showed that the multi-leaf expression rate was the lowest in ripening period,only 14. 89%; and in squaring period,the expression rate recovered to 48. 98%; In vegetative period,multi-leaf expression was returned to a normal level,reached55. 21%; This means that the expression level of multi-leaf rate was obviously interfered with the process of flowering and fruiting,and this interference was restored with the transformation of the growth stage. Meanwhile,the leaf area of different growth stage determination results showed that the leaf area was significantly smaller during the flowering and fruiting stage,the average was 4. 4783 cm~2,but in vegetative period,this number recovered to 16. 4401 cm~2. So,both the multi-leaf trait expression and leaf area of multifoliate alfalfa were obviously restricted by the flowering and fruiting stage.
引文
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[2]Lamb J A F S,Sheaffer C C,Samac D A.Population density and harvest maturity effectson leaf and stem yield in alfalfa[J].Agronomy journal,2003,95(3):635-641.
[3]Smith J G,Mott G O,Bula R J.Ecological parameters of an alfalfa community under fields conditions[J].Crop Science,1964,(4):577-580.
[4]于林青,等.多叶苜蓿的生物学特性[J].中国草地,1995,(4):68-69,72.
[5]Bander W W.Inheritence of odd-leaf character in Medicago sp.M.S.thesis[J].University Nebraska,1938.
[6]Bingham E T.Registration of alfalfa inbred parental line MAG7[J].Crop Science,1993,33(6):1427.
[7]杨红善,等.航苜1号紫花苜蓿多叶性状遗传特性及分子标记检测[J].中国草业学报,2014,(5):46-50.
[8]Juan N A,Sheaffer C C,Barnes D K.Temperature and photoperiod effects on multifoliolate expression and morphology of alfalfa[J].Crop science,1993,33(3):573-578.
[2]Lamb J A F S,Sheaffer C C,Samac D A.Population density and harvest maturity effectson leaf and stem yield in alfalfa[J].Agronomy journal,2003,95(3):635-641.
[3]Smith J G,Mott G O,Bula R J.Ecological parameters of an alfalfa community under fields conditions[J].Crop Science,1964,(4):577-580.
[4]于林青,等.多叶苜蓿的生物学特性[J].中国草地,1995,(4):68-69,72.
[5]Bander W W.Inheritence of odd-leaf character in Medicago sp.M.S.thesis[J].University Nebraska,1938.
[6]Bingham E T.Registration of alfalfa inbred parental line MAG7[J].Crop Science,1993,33(6):1427.
[7]杨红善,等.航苜1号紫花苜蓿多叶性状遗传特性及分子标记检测[J].中国草业学报,2014,(5):46-50.
[8]Juan N A,Sheaffer C C,Barnes D K.Temperature and photoperiod effects on multifoliolate expression and morphology of alfalfa[J].Crop science,1993,33(3):573-578.