Lucerne( Medicago sativa L.) is a plant of strict allogamy,and its pollination relies on bees mainly. Genetic variations of lucerne floral properties,including receptacle diameter,coronary length,number of flowers per...Lucerne( Medicago sativa L.) is a plant of strict allogamy,and its pollination relies on bees mainly. Genetic variations of lucerne floral properties,including receptacle diameter,coronary length,number of flowers per raceme,number of racemes per twig,number of flowers per square metre,percentage of tripped flowers,nectar production,sugar concentration in nectar and contents of sucrose,fructose and glucose in nectar,have been studied with morphological markers,and floral properties of ten lucerne cultivars were also investigated to determine their role in number of visiting bees and to provide a basis for the evaluation of mutant flowers for visitation by bees. The results showed CV( coefficient of variation) of floral properties was from 0. 80% to 92. 30%,of which the content of glucose was the most significant one with variation from 0. 01 to 0. 53 μmol /L( P 【 0. 05),and the sugar concentration was the most insignificant one( P 】 0. 05). The significant order of floral properties affecting the number of visiting bees was that the nectar production per square metre( r = 0. 93,P 【 0. 01) was in the first place,followed by the number of flowers per square metre( r = 0. 92,P 【 0. 01),sucrose concentration of nectar sugar( r = 0. 82,P 【 0. 05),coronary length( r = 0. 77,P 【 0. 05) and nectar production per flower( r = 0. 71,P 【 0. 05).展开更多
基金supported by National Natural Science Foundation of China(Grant No.31060324)Natural Science Foundation of Yunnan Province(Grant No.2012FB148)Natural Science Key Foundation of Yunnan Provincial Education Department(Grant No.2012Z021)
文摘Lucerne( Medicago sativa L.) is a plant of strict allogamy,and its pollination relies on bees mainly. Genetic variations of lucerne floral properties,including receptacle diameter,coronary length,number of flowers per raceme,number of racemes per twig,number of flowers per square metre,percentage of tripped flowers,nectar production,sugar concentration in nectar and contents of sucrose,fructose and glucose in nectar,have been studied with morphological markers,and floral properties of ten lucerne cultivars were also investigated to determine their role in number of visiting bees and to provide a basis for the evaluation of mutant flowers for visitation by bees. The results showed CV( coefficient of variation) of floral properties was from 0. 80% to 92. 30%,of which the content of glucose was the most significant one with variation from 0. 01 to 0. 53 μmol /L( P 【 0. 05),and the sugar concentration was the most insignificant one( P 】 0. 05). The significant order of floral properties affecting the number of visiting bees was that the nectar production per square metre( r = 0. 93,P 【 0. 01) was in the first place,followed by the number of flowers per square metre( r = 0. 92,P 【 0. 01),sucrose concentration of nectar sugar( r = 0. 82,P 【 0. 05),coronary length( r = 0. 77,P 【 0. 05) and nectar production per flower( r = 0. 71,P 【 0. 05).
