Improvement of three popular Indian groundnut varieties for foliar disease resistance and high oleic acid using SSR markers and SNP array in marker-assisted backcrossing

Foliar fungal diseases(rust and late leaf spot)incur large yield losses,in addition to the deterioration of fodder quality in groundnut worldwide.High oleic acid has emerged as a key market trait in groundnut,as it increases the shelf life of the produce/products in addition to providing health benefits to consumers.Marker-assisted backcrossing(MABC)is the most successful approach to introgressing or pyramiding one or more traits using traitlinked markers.We used MABC to improve three popular Indian cultivars(GJG 9,GG 20,and GJGHPS 1)for foliar disease resistance(FDR)and high oleic acid content.A total of 22 BC3F4 and 30 BC2F4 introgression lines(ILs)for FDR and 46 BC3F4 and 41 BC2F4 ILs for high oleic acid were developed.Recurrent parent genome analysis using the 58 K Axiom_Arachis array identified several lines showing upto 94%of genome recovery among second and third backcross progenies.Phenotyping of these ILs revealed FDR scores comparable to the resistant parent,GPBD 4,and ILs with high(~80%)oleic acid in addition to high genome recovery.These ILs provide further opportunities for pyramiding FDR and high oleic acid in all three genetic backgrounds as well as for conducting multi-location yield trials for further evaluation and release for cultivation in target regions of India.     

Seed filling dynamic traits of oil flax in response to nitrogen and phosphorus

Crop yield is primarily seed-filling-limited in production system under field conditions.This study was aimed to determine whether seed filling traits of oil flax(Linum usitatissimum L.)could be controlled by phosphorus(P),nitrogen(N),and phosphorus and nitrogen(NP)supply.Effects on seed filling traits were investigated in 2 years including capsule diameter,capsule height,capsule dry matter(DM),seed DM per capsule,pericarp DM per capsule,protein content and oil content.DM translocation from pericarps to seed,translocation efficiency,and contribution of photoassimilates during seed filling period were also detected.In a randomized complete block design,cultivar'Longyaza 1'was grown under P(33 kg P/ha),N(75 kg N/ha),and NP(33 kg P/ha and 75 kg N/ha)along with a zerofertilizer(CK)treatment in 2013 and 2014.Results suggested that DM translocation efficiency and contribution efficiency increased to different extent due to P,N or NP application.At 42 DAA(days after anthesis),seed DM per capsule reached the greatest,while protein content and pericarp DM obtained the least level.However,the highest oil content was detected at 35 DAA.A significant positive linear relationship was observed between seed DM,capsule DM and DM translocation in both years.Protein content showed inconsistent relation with oil content.The results indicated that appropriate N and P management could be an effective approach to increase oil flax production.     

Ustilaginoidea virens: A Fungus Infects Rice Flower and Threats World Rice Production

Rice false smut disease, which is caused by the fungus Ustilaginoidea virens, is currently one of the most devastating rice fungal diseases in the world. Rice false smut disease not only causes severe yield loss and grain quality reduction, but also threatens food safety due to its production of mycotoxins. In this review, the most recent progresses regarding the life cycle, infection processes, genome and genetic diversity, pathogenic gene and disease resistance in rice were summarized in order to provide theoretical basis for the control of U. virens. We also proposed some future directions and key questions that need to be addressed for a better understanding of the molecular mechanism that leads to rice false smut disease and the prospects for sustainable control of rice false smut.     

广东:第十届广州国际茶文化节暨2009中国(广州)国际茶业博览会隆重开幕

本刊讯11月26日,第十届广州国际茶文化节、2009中国(广州)国际茶业博览会在广州琶洲中洲商务展示中心隆重举行开幕式。原中共中央政治局委员、全国政协副主席杨汝岱,中华全国供销合作总     

今年铁观音春茶特点和市场走势的几点启发

五月的安溪大地,蛰伏着一股巨大力量,来自全国各地的茶商云集,表面被春雨挡住步伐,但一坐下来就是满腹的茶经;我有幸成为其中一员,八年从事茶行业,让我越来越淡定,我想这是茶力量的觉醒,因而我若有所思……     

征订启事

1)本刊2011年杂志仍可订阅,年价48元,如需挂号邮寄,每订户全年另加挂号费18元。2)本刊1996—2010年合订本有售,单价(含邮费)分别为:1996,1997,1998和1999年各25元,2000,2001和2002年各30元,2003,2004和2005年各40元,2006,2007,2008,2009和2010年各60元。     

世界主要产茶国及全球茶园总面积(续)

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茶中有孝道,一品人间情

白茶总是弥漫着神秘的气息,卓剑舟在《太姥山全志》中解释:今呼为白毫,香色俱绝,而尤以鸿雪洞产者为最。性寒凉,功同犀角,为麻疹圣药。这棵长     

2010年西湖龙井新茶价格预计总体平稳

最近,有媒体报道2010年西湖龙井新茶价格将出现上涨,每斤将有200到1000元不等的涨幅,不少人看到新闻后惊呼这西湖龙井喝不起了。为此,本刊电话联系采访了浙江省茶叶产业协会秘书长胡迪钧,他对这样的报道表示吃惊,他说近几年西湖龙井新茶上市之初,除了个别企业     

智慧成就机遇 远见拓展未来——解读肖文华和闽茶奇葩华祥苑

2008年11月,是华祥苑茗茶丰收的一个月。在第四届中国茶业经济年会上,华祥苑不但继续蝉联百强,董事长肖文华行业"投名状"被评选为2008中国茶叶行业年度经济人物:在产品上,华祥苑