The cashew tree is a typical tropical nut tree species in China, and the collection, identification and innovated utilization of excellent cashew germplasm resources are of great significance to increase the income of...The cashew tree is a typical tropical nut tree species in China, and the collection, identification and innovated utilization of excellent cashew germplasm resources are of great significance to increase the income of farmers and agricultural benefits in the tropical area of China. This study summarized the major advances on cashew germplasm resources in China, analyzed the major research progress and existing problems from the aspects of the collection and evaluation, resistances, genetic diversity of cashew germplasm resources, and put forward the work ideas to analyze the construction of core germplasm bank and the genetic stability of the major biological characteristics of cashew germplasm resources, which were of important significance for the improvement of the cultivar classification and resource evaluation system of cashew germplasm resources in China.展开更多
[Objective] This study aimed to screen a set of SSR core primers suitable for purity identification of pepper （Capsicum） hybrids. [Method] DNA fingerprint of 100 pepper hybrids was analyzed using 17 SSR primers. [Re...[Objective] This study aimed to screen a set of SSR core primers suitable for purity identification of pepper （Capsicum） hybrids. [Method] DNA fingerprint of 100 pepper hybrids was analyzed using 17 SSR primers. [Result] According to the polymorphism and heterozygosity, Hpms1-214, Es395 and Hpmsl-5 were determined as three preferred core primers for purity identification of pepper hybrids. By using these three preferred core primers, 97 pepper hybrids （accounting for 97%） had heterozygous band pattern with at least one primer. Es330, Es363, Epms923, Es120 and Es64 were determined as candidate core primers for purity identification of pepper hybrids. Specific primers of 14 varieties were obtained, which could be used to further screen parent-complementary primers of each pepper hybrid. [Con- clusion] This study laid the foundation for constructing standard DNA fingerprints for purity identification of pepper hybrids.展开更多
By using diamond model, the current development status and core competitiveness of the rice seed industry in Guangxi Province were analyzed in detail from the 6 aspects of production factors, demand factors, related i...By using diamond model, the current development status and core competitiveness of the rice seed industry in Guangxi Province were analyzed in detail from the 6 aspects of production factors, demand factors, related industries and support industries, firm strategy, chance factor and government factor, which clarified the advantages of the rice seed industry of Guangxi in the nature and technological factors, firm strategy and government policy, and the disadvantages in demand factors, production cost, infrastructure and related industries. And the corresponding countermeasures were proposed to enhance the competitiveness of the rice seed industry of Guangxi.展开更多
In that DNA diversity detected nowadays could not mean phenotypic diversity,it is the precondition of breeding project and basic research of crop improvement that genetic diversity analysis and sampling of core collec...In that DNA diversity detected nowadays could not mean phenotypic diversity,it is the precondition of breeding project and basic research of crop improvement that genetic diversity analysis and sampling of core collection by phenotypes.Phenotyping and statistic analysis on 9 traits of 92 accessions of cotton germplasm resource from three species（Gossypium hirsutum L.,Gossypium barbadence L.and Gossypium arboreum L.）were conducted.And the statistics（variation coefficient,proportion of special accessions and Shannon-Weaver information index）indicated that initial collection had abundant phenotypic diversity;software NTSYS-pc and the unweighted pair group method of arithmetic（UPGMA）were used for the cluster analysis on genetic similarity coefficient and genetic distance matrix,and the result showed that the genetic relationship among accessions was highly consistent with the pedigree;22 accessions of core collection were selected by software QGAStation,four statistics,such as variance difference percentage（VD%）,mean difference percentage（MD%）,coincidence rate（CR%）and variable rate（VR%）,showed that the genetic diversity of core collection was approximately equal to the initial collection.The results of genetic diversity analysis based on phenotypic data and sampling of core collection would provide reference for breeding projects and basic research.展开更多
[Objective] The paper was to explore the causes of phosphorus(P)efficiency of rice in Yunnan Province,and to provide strategy for ecological and environmental protection.[Method]Using 703 accessions of secondary core ...[Objective] The paper was to explore the causes of phosphorus(P)efficiency of rice in Yunnan Province,and to provide strategy for ecological and environmental protection.[Method]Using 703 accessions of secondary core collections from 16 prefectures of five regions in Yunnan Province,two treatments of low available P(6.26mg/kg)versus normal P(available P 40mg/kg),and invalid P(available P 0.02 mg/kg)versus normal P(available P 70 mg/kg)were set,and zonal characteristics of phosphorus efficiency and the activation characteristics of invalid P of rice landraces were investigated.[Result] Phosphorus efficiency and the activation characteristics of invalid P in soils from rice landraces of Yunnan Province had the similar identification indexes,viz.the relative indexes of four traits(tillering ability or effective panicle,root weight,biomass,and straw weight)could be the screening indexes of gene type of secondary core collection with phosphorus efficiency,which also reflected the zonal characteristics of phosphorus efficiency and the activation characteristics of invalid P in soils of 16 prefectures among five regions.On the contrary,the relative panicle length,node length under panicle,leaf length,leaf width and plant height could only be the assistant indexes of identification for phosphorus efficiency.There were similar zonal characteristics between phosphorus efficiency and the activation characteristics of invalid P in soils of rice landraces in Yunnan Province.[Conclusion] The study had great importance to the conservation and utilization of biological diversity,which would make contribution to second green revolution of "less input,multiple output,promote health,and protect the environment".展开更多
A 65-year-old man presented to our cardiovascular department due to fatigue and palpation on exertion during the previous three weeks. He had a medical history of diabetes mellitus and hyperlipemia without hypertensio...A 65-year-old man presented to our cardiovascular department due to fatigue and palpation on exertion during the previous three weeks. He had a medical history of diabetes mellitus and hyperlipemia without hypertension or myocarditis. However, he mentioned that his son had dilated cardiomyopathy （DCM） and ankylosing spondylitis （AS）. Examination at admission revealed a blood pressure of 115/69 mmHg and pulse of 82 beats/min. The results of routine blood tests for creatine kinase （CK）, CK muscle and brain （CK-MB）, troponin T, and thyroid function were all within normal limits. ECG revealed I, aVL, and V4--6 T wave inversion （Figure 1）. Ultrasonic cardiography showed that the left ventricular ejection fraction （EF） was 32%, in- dicating ventricular wall dysfunction. Angiography showed no coronary stenosis. Radionuclide imaging demonstrated myopathy of the anterior, part of the inferior, the posterior,and the lateral apical segments based on reduced radioactivity with a patchy pattern, consistent with DCM （Figure 2A）.展开更多
基金Supported by the National Nonprofit Institute Research Grant of CATAS-TCGRI(16300320150331630032014032+1 种基金PZSFYL-201613)the Ministry of Agriculture Tropical Crop Germplasm Resources Protection(16RZZY-101)~~
文摘The cashew tree is a typical tropical nut tree species in China, and the collection, identification and innovated utilization of excellent cashew germplasm resources are of great significance to increase the income of farmers and agricultural benefits in the tropical area of China. This study summarized the major advances on cashew germplasm resources in China, analyzed the major research progress and existing problems from the aspects of the collection and evaluation, resistances, genetic diversity of cashew germplasm resources, and put forward the work ideas to analyze the construction of core germplasm bank and the genetic stability of the major biological characteristics of cashew germplasm resources, which were of important significance for the improvement of the cultivar classification and resource evaluation system of cashew germplasm resources in China.
基金Supported by Excellent Team Training Program of Yunnan Academy of Agriculture Sciences(YAAS2014YY002)~~
文摘[Objective] This study aimed to screen a set of SSR core primers suitable for purity identification of pepper （Capsicum） hybrids. [Method] DNA fingerprint of 100 pepper hybrids was analyzed using 17 SSR primers. [Result] According to the polymorphism and heterozygosity, Hpms1-214, Es395 and Hpmsl-5 were determined as three preferred core primers for purity identification of pepper hybrids. By using these three preferred core primers, 97 pepper hybrids （accounting for 97%） had heterozygous band pattern with at least one primer. Es330, Es363, Epms923, Es120 and Es64 were determined as candidate core primers for purity identification of pepper hybrids. Specific primers of 14 varieties were obtained, which could be used to further screen parent-complementary primers of each pepper hybrid. [Con- clusion] This study laid the foundation for constructing standard DNA fingerprints for purity identification of pepper hybrids.
文摘By using diamond model, the current development status and core competitiveness of the rice seed industry in Guangxi Province were analyzed in detail from the 6 aspects of production factors, demand factors, related industries and support industries, firm strategy, chance factor and government factor, which clarified the advantages of the rice seed industry of Guangxi in the nature and technological factors, firm strategy and government policy, and the disadvantages in demand factors, production cost, infrastructure and related industries. And the corresponding countermeasures were proposed to enhance the competitiveness of the rice seed industry of Guangxi.
基金Supported by National Natural Science Foundation of China(30971821)the Research Fund for the Doctoral Program of Higher Education of China(20090204120017)"Program for Key Academic Youths"of Northwest A&F University(Z111020712)~~
文摘In that DNA diversity detected nowadays could not mean phenotypic diversity,it is the precondition of breeding project and basic research of crop improvement that genetic diversity analysis and sampling of core collection by phenotypes.Phenotyping and statistic analysis on 9 traits of 92 accessions of cotton germplasm resource from three species（Gossypium hirsutum L.,Gossypium barbadence L.and Gossypium arboreum L.）were conducted.And the statistics（variation coefficient,proportion of special accessions and Shannon-Weaver information index）indicated that initial collection had abundant phenotypic diversity;software NTSYS-pc and the unweighted pair group method of arithmetic（UPGMA）were used for the cluster analysis on genetic similarity coefficient and genetic distance matrix,and the result showed that the genetic relationship among accessions was highly consistent with the pedigree;22 accessions of core collection were selected by software QGAStation,four statistics,such as variance difference percentage（VD%）,mean difference percentage（MD%）,coincidence rate（CR%）and variable rate（VR%）,showed that the genetic diversity of core collection was approximately equal to the initial collection.The results of genetic diversity analysis based on phenotypic data and sampling of core collection would provide reference for breeding projects and basic research.
基金Supported by National Natural Science Foundation of China(31060186)Exploitue of Emphases New Production from Yunnan Provincial Scientific and Technology Department(2010BB001)Kunming Scientific and Technology Bureau(Kunkejizi10N060204)
文摘[Objective] The paper was to explore the causes of phosphorus(P)efficiency of rice in Yunnan Province,and to provide strategy for ecological and environmental protection.[Method]Using 703 accessions of secondary core collections from 16 prefectures of five regions in Yunnan Province,two treatments of low available P(6.26mg/kg)versus normal P(available P 40mg/kg),and invalid P(available P 0.02 mg/kg)versus normal P(available P 70 mg/kg)were set,and zonal characteristics of phosphorus efficiency and the activation characteristics of invalid P of rice landraces were investigated.[Result] Phosphorus efficiency and the activation characteristics of invalid P in soils from rice landraces of Yunnan Province had the similar identification indexes,viz.the relative indexes of four traits(tillering ability or effective panicle,root weight,biomass,and straw weight)could be the screening indexes of gene type of secondary core collection with phosphorus efficiency,which also reflected the zonal characteristics of phosphorus efficiency and the activation characteristics of invalid P in soils of 16 prefectures among five regions.On the contrary,the relative panicle length,node length under panicle,leaf length,leaf width and plant height could only be the assistant indexes of identification for phosphorus efficiency.There were similar zonal characteristics between phosphorus efficiency and the activation characteristics of invalid P in soils of rice landraces in Yunnan Province.[Conclusion] The study had great importance to the conservation and utilization of biological diversity,which would make contribution to second green revolution of "less input,multiple output,promote health,and protect the environment".
文摘A 65-year-old man presented to our cardiovascular department due to fatigue and palpation on exertion during the previous three weeks. He had a medical history of diabetes mellitus and hyperlipemia without hypertension or myocarditis. However, he mentioned that his son had dilated cardiomyopathy （DCM） and ankylosing spondylitis （AS）. Examination at admission revealed a blood pressure of 115/69 mmHg and pulse of 82 beats/min. The results of routine blood tests for creatine kinase （CK）, CK muscle and brain （CK-MB）, troponin T, and thyroid function were all within normal limits. ECG revealed I, aVL, and V4--6 T wave inversion （Figure 1）. Ultrasonic cardiography showed that the left ventricular ejection fraction （EF） was 32%, in- dicating ventricular wall dysfunction. Angiography showed no coronary stenosis. Radionuclide imaging demonstrated myopathy of the anterior, part of the inferior, the posterior,and the lateral apical segments based on reduced radioactivity with a patchy pattern, consistent with DCM （Figure 2A）.
