Two Cycles of Recurrent Maternal Half-Sib Selection Reduce Foliar Late Blight in a Diploid Hybrid Solanum phureja-S. stenotomum Population by Two-thirds     

Kathleen G. Haynes  Xinshun Qu  Barbara J. Christ 《American Journal of Potato Research》2014,91(3):254-259

Foliar late blight, caused by Phytophthora infestans, is an important disease problem worldwide. Foliar resistance to late blight was found in a hybrid population of the cultivated diploid species Solanum phureja-S. stenotomum (phu-stn). The objective of this study was to determine if resistance to late blight could be improved by recurrent maternal half-sib selection in the phu-stn population. Four clones from each of 72 maternal half-sib families plus the check cultivar ‘Atlantic’ were evaluated for late blight resistance in replicated field trials in Pennsylvania. The most late blight resistant clone from each of the 72 families was randomly intermated to advance the population. The cycle 1, 2, and 3 populations were evaluated in 1996–1997, 2003–2004, and 2009–2010, respectively. Percent infected foliage was recorded several times towards the end of the growing season and used to compute area under the disease progress curve (AUDPC). Mean AUDPC was 652 (cycle 1), 556 (cycle 2), and 276 (cycle 3), whereas the mean AUDPC of ‘Atlantic’ ranged from 775 to 863 each cycle. Narrow-sense heritability for resistance was estimated as 0.78, 0.77, and 0.80 in cycles 1, 2, and 3, respectively. Recurrent maternal half-sib selection continues to improve the levels of resistance to late blight in this diploid population with no adverse effect on the amount of additive genetic variance. Additional improvements for late blight resistance are likely to occur if this approach is continued.  相似文献   

Cytogenetic and marker assisted identification of a wheat–Psathyrostachys huashanica Keng f. ex P.C.Kuo alien substitution line conferring processing quality and resistance to stripe rust     

Qu  Xiaojian  Zhang  Deshi  Zhang  Xiangyu  Wang  SiWen  Wang  Changyou  Wang  Yanzhen  Wang  Yajuan  Chen  Chunhuan  Zhang  Hong  Ji  Wanquan 《Genetic Resources and Crop Evolution》2022,69(2):687-698

Genetic Resources and Crop Evolution - Psathyrostachys huashanica Keng f. ex P.C.Kuo (2n?=?2x?=?14, NsNs) harbor numerous useful genes and exhibit application prospects as a...  相似文献   

In Vitro Anti-Inflammatory Activity of Three Peptides Derived from the Byproduct of Rice Processing     

Qu  Tingmin  He  Shuwen  Ni  Ce  Wu  Ying  Xu  Zhou  Chen  Mao-Long  Li  Honghui  Cheng  Yunhui  Wen  Li 《Plant foods for human nutrition (Dordrecht, Netherlands)》2022,77(2):172-180

Plant Foods for Human Nutrition - Inflammation is a contributing factor to the initiation and progression of many diseases, and some food-derived biofunctional peptides show high anti-inflammatory...  相似文献   

干旱条件下花生品种筛选试验     

曲杰 《山东农业科学》2013,(10):38-40

以山东省12个主推大花生品种为试材，研究干旱条件（播种至开花下针期不浇水）下各品种的表现，筛选出4个适宜菏泽生态条件栽培的抗旱品种，其主茎高平均36．1cm，侧枝长平均39．6cm，主要农艺性状间表现出正相关性；不抗旱品种营养相关性状与产量相关性状表现为负相关。  相似文献   

曾祖代(原种)鸡场的产品开发     

瞿炜 《中国家禽》2000,22(9):5-6,10

作为企业，向社会提供适销对路的产品，是曾祖代鸡场永恒的主题。任何鸡的品种只有不断进行选育才不会落后和退化；任何产品都有其生命周期，鸡的品种也是一样。曾祖代鸡场是我国养鸡业的龙头企业，作为种子工程，国家历来十分重视。曾祖代鸡场进行产品开发，具有十分重要的意义，面临WTO的到来具有紧迫性。没有产品开发，鸡场的品种迟早会落后于市场需要。  相似文献   

猪的行为特征探讨与饲养管理的改善   总被引：2，自引：0，他引：2  

屈彦纯  邓昌彦  刘桂兰 《贵州畜牧兽医》2001,25(5):9-10

猪的行为是猪的本质特征的外在表现，在很大程度上影响着养猪工艺的发展和养猪业的效益。本文概括的分析了猪一般的行为特点和在饲养管理过程中的利用与改善措施。并对相关遗传特征进行了探讨。随着人们对猪的行为性状重要性认识的不断深入，猪的行为特征将在科学和生产过程中得到更加广泛的利用。  相似文献   

音乐教育专业舞蹈课教学的特殊性初探     

彭曲 《湖南农机》2006,(7)

高等院校音乐教育专业舞蹈课教学必须重视其特殊性,本文对舞蹈课程教学的特殊性从四个方面进行了分析,一是突出动作示范,二是加强趣味教学,三是注重特色训练,四是体现层次教育。  相似文献   

Serum antibody response and Cryptosporidium parvum oocyst antigens recognized by sera from naturally infected sheep.     

J Quílez  C A Vergara-Castiblanco  M E Ares-Mazás  C Sánchez-Acedo  E del Cacho  F Freire-Santos 《Veterinary parasitology》2002,104(3):187-197

The response of specific serum immunoglobulins (IgG, IgM and IgA) and the major antigens of Cryptosporidium parvum recognized by these isotypes were investigated by using enzyme-linked immunosorbent assay and immunoblot techniques in lambs and ewes naturally infected throughout an outbreak of cryptosporidiosis. Serum samples were collected from 20 lambs the first day they showed diarrhoea (D1), and Days 11 and 22, in addition to single serum samples from 17 of their dams. Serum anti-C. parvum IgG, IgM and/or IgA antibodies were detected in lambs as early as Day 1. Levels of IgM antibodies remained steady from D1 to D11 and increased at D22, whereas the IgG response decreased from D1 to D11 and subsequently increased. In contrast, IgA antibodies rapidly fell from D1 and all lambs were seronegative at D11 and D22. The highest levels of specific antibodies were detected in sera from ewes. In fact, all ewes were seropositives for IgM and IgA isotypes and most (16/17) showed positive levels of IgG. Four protein fractions (37-39, 42-48, 51-57 and 60-69 kDa) were the most frequently recognized by IgG and IgM from lamb sera. A low molecular weight fraction (12-14 kDa) reacting with IgG and IgA in most lamb sera was scarcely recognized by IgM and three broad bands were frequently recognized by IgA antibodies (23-25, 51-57 and 90-95 kDa). The recognition pattern of 23-25 kDa peptides by IgA from lamb sera clearly increased with the age. Peptides of 42-48, 51-57, 60-69 and 71-78 kDa were most frequently recognized by IgG and IgM from ewe sera. In relation to IgA antibodies from ewe sera, a frequent immunoreactivity was found with proteins in the intervals between 12 and 22 kDa as well as between 32 and 34 kDa and practically all sera reacted with fractions from 42 to 95 kDa.  相似文献   

多胺交联纤维素树脂的合成及吸附性能(Ⅺ)——天然高分子吸附剂研究     

曲荣君  王春华  阮文举  鞠录国 《林产化学与工业》1997,(3)

报道了多乙烯多胺交联的纤维素树脂的合成及其对若干重金属离子的静态吸附性能和吸附机理。研究结果表明，该树脂能有效地吸附Ｃｕ２＋、Ｎｉ２＋、Ｃｏ２＋、Ｚｎ２＋、Ｐｂ２＋，其吸附量可分别达１．２８，１．２４，０．５８，０．６６和０．９９ｍｍｏｌ／ｇ。在ＨＯＡｃ－ＮａＯＡｃ缓冲溶液中可选择吸附Ｃｕ２＋、Ｎｉ２＋等离子而不吸附Ｐｂ２＋。  相似文献   

不同浓度肥料配施对一品红生长发育的影响     

张黎  李勇  屈凤兰  张咏静 《农业科学研究》2005,26(2):90-92

试验以4种不同浓度肥料进行一品红栽培对比试验，调查其株高、茎粗、分枝数、叶片数、红叶片数等生长指标．结果表明：不同浓度肥料配以不同的施肥方法，对一品红生长发育的影响有明显差异．以NP—K(mg／L)=260：80：200浓度的肥料配比栽培效果最好．  相似文献