杏、李和杏李光合特性比较及优异种质筛选

利用Li-6400便携式光合测定系统对80份杏、李和杏李种质光合参数进行测定的结果表明,供试品种间光合特性差异较大。对80份种质进行聚类分析,根据光合速率将它们分为高、中、低3种光合速率类型,根据水分利用效率分为高、较高、中及低4种水分利用效率类型。杏中高光合速率类型占50%,高于李、杏李中该类型的频率;李和杏李则以中等光合速率为主,分别占55.2%和62.5%。杏和杏李中较高和中等水分利用效率类型较多,未发现高和低水分利用效率类型,而李的水分利用效率类型则分布广泛。综合考虑光合和水分指标,筛选出2个李品种澳得罗达、理查德早生,3个杏品种超仁、兰州大接杏和仰韶杏表现出高光效、较高水分利用效率,可用于今后的生产和育种实践。

Comparison of Photosynthetic Characters in Different Apricot, Plum and Apricot Plum and the Screening of Outstanding Germplasm

By using Li-6400 portable photosynthesis system,the photosynthetic character of 80 apricot,plum and apricot plum varieties were measured.The result showed that difference among the tested genotypes were extreme significant.According to photosynthesis rate(Pn),80 genotypes were classified into highest,middle and lowest photosynthesis type by using cluster analysis.Highest,higher,middle and lowest water using efficiency(WUE) type were also ranked according to WUE.Distribution frequency of the highest photosynthesis rate type varieties in apricot was higher than that in plum and apricot plum,account for 50.0%.Frequency of middle photosynthesis rate type in plum and apricot plum,accounted for 55.2% and 62.5% respectively.There were more higher and middle WUE genotypes in apricot and apricot plum,but distribution of WUE types in plum was broad.2 plum genotypes 'Aodeluoda','Lichadezaosheng' and 3 apricot genotypes 'Chaoren','Lanzhoudajiexing','Yangshaoxing'with highest Pn.and higher WUE were choosed for useing in breeding.