杂交与亲本沙棘光合生理特性与产果量的差异性研究  

Comparative study on photosynthetic physiological characteristics and fruit yield among hybrids and its parents of sea-buckthorn

作　　者：赵东苑 孙旭[1] 王勇轶[1] 徐荣会 常玉山 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010020 [2]包头林业局阿尔丁植物园,内蒙古包头014000

出　　处：《广东农业科学》2014年第22期29-34,共6页Guangdong Agricultural Sciences

摘　　要：以中国沙棘亚种丰宁雄(父本)与蒙古沙棘亚种乌兰沙林(母本),以及二者的杂交子代优选雌株为研究对象,比较了杂交子代沙棘与其亲本之间光合生理指标和产果量的差异。结果表明,亲本与杂交子代沙棘的净光合速率(Pn)、蒸腾速率(E)、气孔导度(GS)的日变化曲线均为单峰曲线,但峰值出现的时间不同;杂交子代沙棘的净光合速率、蒸腾速率和气孔导度均显著高于亲本,但是杂交子代的水分利用效率不及双亲,抗旱能力较差;而子代沙棘植株的果产量明显高于母本。因此,从抗旱能力方面评价,现有杂交子代还不是最佳的改良品种,尚需进一步选优和更新。Taking Chinese subspecific Fengningxiong sea-buckthorn（male parent）, Mongolian Zautra Sarin（female parent） and their premium female offsprings as objects, the study compared the photosynthetic physiological characteristics and fruit yield among the parents and offsprings. The resucts showed that the daily curves about net photosynthetic rate（Pn）, transpiration rate（E） and stomatal conductance（GS） of the parents and offsprings were unimodal, but the peak values emerged at different times. The offspring excelled its parents greatly in net photosynthetic rate, transpiration rate and stomatal conductance, but the water utilization efficiency of the offspring was lower than that of its parents, which led to an inferior drought resistance ability. And the offspring yield was higher than the parents. Based on the drought resistance ability, it can be concluded that the hybrid is not the best improved breed, further selection and improvement is still expected.

关 键 词：沙棘 杂交育种 光合生理特性 水分利用效率 产果量 

分 类 号：S793.6[农业科学—林木遗传育种]