Two new freshwater atyid shrimps, Caridina angustipes sp nov.and C clavipes sp nov.from Hunan Province,China are described. C angustipes sp nov.is similar to C baojingensis Guo,He et Bai,1992,b...Two new freshwater atyid shrimps, Caridina angustipes sp nov.and C clavipes sp nov.from Hunan Province,China are described. C angustipes sp nov.is similar to C baojingensis Guo,He et Bai,1992,but with longer rostrum,15-27 dorsal teeth,3-6 ventral teeth,and straighter inner margin of endopods in male 1st pleopods. C clavipes sp nov.is similar to C angustipes ,but with narrower distal and fewer spines on inner margin of endopds in male 1st pleopods,and shorter and thinner appendix masculina in male 2nd pleopods with only 1 spine on inner lateral margin and 4 spines in apex.The holotypes are deposited in Shanghai Fisheries University.Some representative paratypes are deposited in Foshan Science and Technology College.展开更多
[Objective] The genetic diversity of major mango cultivars in China was analyzed by using SSR markers, and their fingerprints were constructed so as to provide theoretical basis for germplasm innovation and breeding o...[Objective] The genetic diversity of major mango cultivars in China was analyzed by using SSR markers, and their fingerprints were constructed so as to provide theoretical basis for germplasm innovation and breeding of mango. [Method] With 115 pairs of SSR primers, genetic diversity analysis and cluster analysis were performed for 30 mango cultivars, among which the genetic relationships were analyzed. [Result] Total 64 pairs of polymorphic primers were screened out from the 115 pairs of primers, and total 343 bands were amplified from the 30 cultivars with 73.2% of polymorphic bands. On average, 3.9 allelic loci were detected for each pair of primers with genetic diversity index of 0.5, Shannon＇s diversity index of 1.00 and polymorphism information content of 0.49, indicating higher genetic diversity. The cluster analysis showed that the 30 major cultivars could be classified into four categories. The first category included 14 cultivars; the second category included 11 cultivars, most of which were introduced from abroad; the third category included 4 cultivars, Le., Miansan, Parayinda, Baiyu and Hongxiangya： the fourth category included only one cultivar Maqiesu.By using 7 pairs of SSR markers, i.e., M42, M49, M54, M55, M96, M99 and M103, digital fingerprints were constructed for the 30 mango cultivars. [Conclusion] The 30 mango cultivars present more complex genomic genetics and abundant genetic information, and they have higher genetic diversity.展开更多
Sweet basil （Ocimum basilicum L.） is a popular culinary herbal crop grown for the fresh or dry leaf, essential oil and seed markets. Recently, basil has been shown to rank highest among spices and herbal crops for x...Sweet basil （Ocimum basilicum L.） is a popular culinary herbal crop grown for the fresh or dry leaf, essential oil and seed markets. Recently, basil has been shown to rank highest among spices and herbal crops for xanthophyll carotenoids, which are associated with a decreased risk of cancer and age-related eye diseases. Nitrogen fertilizer encourages vegetative growth and increases oil yield in aromatic plants by enhancing leaf area development and photosynthetic rate. Our goal was to determine the influence of different concentrations of nitrogen （N） fertilization on basil physiology. The trial examined the cultivation of Ocimum basilicum L. （variety Genovese gigante）. The experiment was carried out under Mediterranean climatic conditions. The experiment considered the adoption of three nitrogen （N） treatments （0, 160, 240 kg N ha-1）. The following biometric parameters were determined： plant height, leaves per plant, leaf to stem ratio, number of branchings per plant, leaf area index （LAI）, above-ground fresh and leaf biomass. Considering the parameters most strictly linked to the economic results （total fresh weight, fresh weight of the leaves and total dry weight）, we found that 160 kg N ha^-1 treatment showed the best performance.展开更多
文摘Two new freshwater atyid shrimps, Caridina angustipes sp nov.and C clavipes sp nov.from Hunan Province,China are described. C angustipes sp nov.is similar to C baojingensis Guo,He et Bai,1992,but with longer rostrum,15-27 dorsal teeth,3-6 ventral teeth,and straighter inner margin of endopods in male 1st pleopods. C clavipes sp nov.is similar to C angustipes ,but with narrower distal and fewer spines on inner margin of endopds in male 1st pleopods,and shorter and thinner appendix masculina in male 2nd pleopods with only 1 spine on inner lateral margin and 4 spines in apex.The holotypes are deposited in Shanghai Fisheries University.Some representative paratypes are deposited in Foshan Science and Technology College.
基金Supported by Natural Science Foundation of Hainan Province(34128)Fundamental Scientific Research Funds of Chinese Academy of Tropical Agricultural Sciences(1630032013031)~~
文摘[Objective] The genetic diversity of major mango cultivars in China was analyzed by using SSR markers, and their fingerprints were constructed so as to provide theoretical basis for germplasm innovation and breeding of mango. [Method] With 115 pairs of SSR primers, genetic diversity analysis and cluster analysis were performed for 30 mango cultivars, among which the genetic relationships were analyzed. [Result] Total 64 pairs of polymorphic primers were screened out from the 115 pairs of primers, and total 343 bands were amplified from the 30 cultivars with 73.2% of polymorphic bands. On average, 3.9 allelic loci were detected for each pair of primers with genetic diversity index of 0.5, Shannon＇s diversity index of 1.00 and polymorphism information content of 0.49, indicating higher genetic diversity. The cluster analysis showed that the 30 major cultivars could be classified into four categories. The first category included 14 cultivars; the second category included 11 cultivars, most of which were introduced from abroad; the third category included 4 cultivars, Le., Miansan, Parayinda, Baiyu and Hongxiangya： the fourth category included only one cultivar Maqiesu.By using 7 pairs of SSR markers, i.e., M42, M49, M54, M55, M96, M99 and M103, digital fingerprints were constructed for the 30 mango cultivars. [Conclusion] The 30 mango cultivars present more complex genomic genetics and abundant genetic information, and they have higher genetic diversity.
文摘Sweet basil （Ocimum basilicum L.） is a popular culinary herbal crop grown for the fresh or dry leaf, essential oil and seed markets. Recently, basil has been shown to rank highest among spices and herbal crops for xanthophyll carotenoids, which are associated with a decreased risk of cancer and age-related eye diseases. Nitrogen fertilizer encourages vegetative growth and increases oil yield in aromatic plants by enhancing leaf area development and photosynthetic rate. Our goal was to determine the influence of different concentrations of nitrogen （N） fertilization on basil physiology. The trial examined the cultivation of Ocimum basilicum L. （variety Genovese gigante）. The experiment was carried out under Mediterranean climatic conditions. The experiment considered the adoption of three nitrogen （N） treatments （0, 160, 240 kg N ha-1）. The following biometric parameters were determined： plant height, leaves per plant, leaf to stem ratio, number of branchings per plant, leaf area index （LAI）, above-ground fresh and leaf biomass. Considering the parameters most strictly linked to the economic results （total fresh weight, fresh weight of the leaves and total dry weight）, we found that 160 kg N ha^-1 treatment showed the best performance.
