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A földbirtok-politika választ igénylő kérdései AgEcon
Kapronczai, Istvan.
A kérdések széles területet ölelnek fel, ami folytatható a földvédelemmel, a kör-nyezetvédelemmel, a földadó kérdésével stb. A politikának – kompromisszumokkal és megegyezéssel – mielőbb lépnie kell, mert a rendezett birtokviszonyok növelik a földárat, élénkítik a termőföld iránti keresletet. Az emelkedő árak ugyanakkor bővítik a földkínálatot, végeredményben élénkül az egész földpiac. Ez a leghatékonyabb eszköz a termőfölddel kapcsolatos spekulációk visszaszorítására. Van-e azonban esély a megegyezésre? Politikai síkon aligha! Sőt az agrárközgazdász szakma is meglehetősen megosztott a birtok, a föld kérdésében, hisz körein¬ken belül is hatnak az érdekek, a megcsontosodott előítéletek. Mégis szükség van egy szakmai vitára, egy őszinte véleménycserére,...
Tipo: Journal Article Palavras-chave: Birtokpolitika; Földtulajdon; Földbérlet; Földhasználat; Örökösödés; Land ownership policy; Land ownership; Land lease; Land use; Inheritance; Agricultural and Food Policy; Land Economics/Use; Political Economy.
Ano: 2010 URL: http://purl.umn.edu/99087
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A recessive gene conferring ethylene insensitivity and androecy in Cucurbita pepo National Institute of Agronomic Research
Manzano, S.; Dominguez, V.J.; Garrido, D.; Gómez, P.; Jamilena, M..
The genetic and physiological analysis performed in the ‘Vegetable spaghetti’ (Veg) inbred line of Cucurbita pepo subsp. pepo has indicated that its androecious phenotype is determined by a single recessive gene conferring ethylene insensitivity. The production of female flowers in the androecious line starts much later than in normal varieties, and is lower than 30 %, with some of the plants producing less than 5 % female flowers. The androecious trait segregates as a single recessive gene in F2 generation, and cosegregates with a weak ethylene insensitive phenotype in seedlings. In fact, etiolated seedlings of the ‘Veg’ line and the most androecious plants in the F2 generation produce more ethylene than the contrasting line, but are less sensitive to...
Tipo: Poster Palavras-chave: Inheritance; Ethylene production; Sex expression; Cucurbita pepo; Androecy.
Ano: 2008 URL: http://hdl.handle.net/2174/280
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ASSETS AT MARRIAGE IN RURAL ETHIOPIA AgEcon
Fafchamps, Marcel; Quisumbing, Agnes R..
This paper examines the determinants of assets at marriage in rural Ethiopia. We identify and test three separate processes that determine assets brought to marriage: assortative matching, compensating parental transfers at marriage, and strategic behavior by parents. We find ample evidence for the first, none for the second, and some evidence of the third for brides. We also find no evidence of competition for parental assets among siblings. Results suggest that parents do not transfer wealth to children in ways that compensate for marriage market outcomes. Certain parents, however, give more assets to daughters whenever doing so increases the chances of a daughter marrying a wealthy groom.
Tipo: Working or Discussion Paper Palavras-chave: Ethiopia; Property; Marriage Market; Intrahousehold allocation; Intergenerational transfers; Rural population; Inheritance; Labor and Human Capital.
Ano: 2004 URL: http://purl.umn.edu/60310
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Genetic control of aluminum tolerance in tropical maize germplasm Bragantia
Coelho,Caroline de Jesus; Bombardelli,Renato Gustavo Hoffmann; Schulze,Guilherme Stalchmidt; Caires,Eduardo Fávero; Matiello,Rodrigo Rodrigues.
ABSTRACT Aluminum (Al) toxicity is the most limiting factor to maize crop productivity in acid soils. Therefore, the understanding of inheritance of Al tolerance in maize is important for the developmentof more adequate procedures for Al tolerant genotypes selection. In this sense, the objectives of this study were to determine the inheritance, and the general (GCA) and specific combining ability (SCA) for Al tolerance in tropical maize. First, we evaluated diallel crosses of maize from landrace and hybrid germplasms for Al tolerance through the minimal solution methodology. The DIF data (root growth difference) were analyzed by Griffing diallel model. Later the additive-dominant genetic model proposed by Mather and Jinks (1971) was used to estimate the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Combining ability; Heritability; Inheritance; Zea mays L..
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000100071
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Genetic control of cowpea seed sizes Scientia Agricola
Lopes,Francisco Cláudio da Conceição; Gomes,Regina Lúcia Ferreira; Freire Filho,Francisco Rodrigues.
Cowpea [Vigna unguiculata (L.) Walp.] is one of the most widely adapted grain legumes in hot regions of Africa, Asia and the Americas. In the semiarid Northeast of Brazil, it is the main subsistence crop, an excellent protein source of low cost, for the poor population. The objective of this work was to estimate genetic parameters to understand the inheritance of seed sizes in cowpea. The parents P1 and P2 and the generations, F1, F2, BC1 and BC2 of the cross TVx5058-09C X Manteiguinha formed the genetic material for this study. These six generates (P1, P2, F1, F2, BC1 and BC) were evaluated in a completely randomized block-design with six replications, in Teresina - PI, Brazil, in 1998. The genetic parameters estimated were: phenotypic and total genetic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vigna unguiculata; 100-seed weight; Inheritance; Gene effect.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200016
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Genetic control on morphoagzronomic traits in snap bean BABT
Silva,Marlon Peres da; Amaral Júnior,Antônio Teixeira do; Rodrigues,Rosana; Pereira,Messias Gonzaga; Viana,Alexandre Pio.
Five divergent snap bean accessions from the vegetables germplasm bank at UENF and their ten diallel hybrids were evaluated to inheritance on five morphoagronomic traits using Hayman's methodology (1954). The results showed that additive effects were predominant for pod weight per plant, number of seeds per pod, height of the insertion of the first pod and number of days to flowering while non-additive effects were more important for number of pods per plant. The best strategy to be adopted was the use of these acessions in an intrapopulation breeding program aiming the obtaintion of superior segregants. For pod numbers the indicated strategy would be an interpopulational breeding procedure, to exploite the heterosis related to the non-additive effects....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Snap bean; Phaseolus vulgaris; Diallel analysis; Inheritance.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600004
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Heranca da resistencia ao oidio (Sphaerotheca fuliginea) em melancia (Citrullus lanatus). Repositório Alice
BORGES, R. M. E.; FRANCA, J. G. E. de; QUEIROZ, M. A. de; DIAS, R. de C. S..
Com o objetivo de determinar a heranca da resistencia ao oidio em melancia, realizaram-se estudos em campo e em casa telada na Estacao Experimental da Embrapa Semi-Arido, situada no Projeto Bebedouro, em Petrolina, PE. Utilizaram-se as geracoes F1 e F2, e os retrocruzamentos 1 e 2 derivados de uma linhagem resistente denominada 90-251, com uma variedade norte-americana, denominada Crimson sweet, considerada altamente suscetivel. A reacao dos genotipos a S. fuliginea foi avaliada segundo uma escala de notas variando de 0 a 3. As leituras, a intevalos semanis, foram feitas logo apos o surgimento dos sintomas no pai suscetivel a nivel de campo (total de cinco leituras). Os dados foram analisados atraves do teste de X2 ao nivel de 5% de probabilidade. Segundo...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Heranca; Shaerotheca fuliginea; Diseases; Resistance; Inheritance; Watermelon; Melancia; Doença; Citrullus Lanatus; Oídio; Resistência; Oidium; Watermelons.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/131627
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Identification of a CAPS marker in an eIF4E gene linked to Zucchini yellow mosaic virus resistance in watermelon National Institute of Agronomic Research
Ling, K.S.; Harris, K.; Meyer, J.D.F.; Levi, A.; Guner, N.; Wehner, T.C.; Havey, M.J..
Genes that encode eukaryotic initiation factors (eIF) 4E and iso(4E) have been associated with the recessively inherited resistance to potyviruses in a number of plant species. Using previously developed degenerate primers, partial eIF4E and eIF(iso)4E gene sequence regions were obtained through polymerase chain reaction of the genomic DNA templates prepared from the Zucchini yellow mosaic virus (ZYMV)-resistant U.S. Plant Introduction (PI) 595203, and the ZYMV-susceptible ‘New Hampshire Midget’ (NHM). A single nucleotide polymorphism (SNP) was identified in the intron II region of the eIF4E sequence between the resistant and susceptible parental genotypes. F2 and BC1 populations were developed using PI 595203 and NHM and each plant was phenotyped for...
Tipo: Conference Paper Palavras-chave: Citrullus; Inheritance; Recessive gene; Potyvirus; ZYMV; Disease resistance; SNP markers; CAPS marker; Molecular marker; Elisa test; Inheritance; EIF4E.
Ano: 2008 URL: http://hdl.handle.net/2174/208
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Influência da presença ou ausência de chifre sobre a produtividade dos ovinos. Infoteca-e
PONCE DE LEON, F. A.; LIMA, F. de A. M.; SIMPLÍCIO, A. A..
Forma de heranca; Relacao entre criptorquidismo e ausencia de chifres; Efeito da presenca ou ausencia de chifres sobre a produtividade dos ovinos.; Morada Nova, Santa Ines e Somalis Brasileira.
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Ovino; Produtividade; Herança genética; Chifre; Sheep; Inheritance; Horns; Productivity.
Ano: 1982 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/514288
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Inheritance of a new albino mutation in Brazilian free-range black chickens Rev. Bras. Ciênc. Avic.
Jorge,W; Cunha,LM.
A genetically recessive albino mutation, which inhibits pigment development in the eyes, skin, and feathers of domestic chickens from Brazil, is described. This mutation appeared in a flock of completely black chickens of a private breeder. There are no information on the origin, breed, or specific line of the birds. Pigment inhibition is apparently complete in the feathers and eyes. Bird sight is very impaired, but no histological examination was carried out. Ratios obtained in F2 and backcrossed birds indicate that a single autosomal recessive gene is responsible for the condition. The data suggest that the absence of melanin in the eyes, skin, and feathers (symbol cc) is a mutation of the pigmented C wild gene.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Albinism; Chicken; Inheritance; Melanin.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000300003
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Inheritance of malate dehydrogenase in wild pepper Bragantia
SCHUELTER,ADILSON RICKEN; CASALI,VICENTE WAGNER DIAS; FINGER,FERNANDO LUIZ.
Leaf extracts from wild pepper (Capsicum flexuosum Sendt) were analysed for the presence of malate dehydrogenase (E.C. 1.1.1.37; MDH) isozymes using starch gel electrophoresis. Seven phenotypes for MDH isozymes were observed in the genitors. Genetic analysis in F1 progenies revealed five loci coding for MDH. Isozyme banding patterns of hybrids indicated that MDH-3 and MDH-4 genes code for monomeric enzymes, while MDH-5 for a dimeric isoform. In MDH-2 loci, one particular F1 progeny showed a significant deviation from the expected isozyme pattern. It is possible that other genes are controlling the expression of MDH-2 in pepper. Also, there are two alleles coding for MDH-2 isozyme. On the other hand, MDH-1 was monomorphic for all genotypes used in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wild pepper; Capsicum flexuosum; Malate dehydrogenase; Inheritance.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051999000100001
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Inheritance of purple pigmentation in two-line rice hybrids International Rice Research Institute
Mahalingam, L.; Nadarajan, N..
p.12-13
Palavras-chave: Inheritance; Colour; Pigmentation; Genes; Segregation; Crosses; Hybrids; Genetic markers; India.
Ano: 2005 URL: http://hdl.handle.net/123456789/1091
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Inheritance of scentedness in two-line rice hybrids International Rice Research Institute
Mahalingam, L.; Nadarajan, N..
p.13-14
Palavras-chave: Inheritance; Aroma; Recessive genes; Segregation; Crosses; Hybrids; India.
Ano: 2005 URL: http://hdl.handle.net/123456789/1092
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Inheritance of the flowering time in maize. I. Diallel analysis. Repositório Alice
LOPES, U.V.; GALVAO, J.D.; CRUZ, C.D..
Visando obter informacoes a respeito da heranca do numero de dias para a floracao do milho, quatro linhagens, num dialelo completo, foram usadas. Verificou-se que este carater e controlado por pelo menos tres genes, ou blocos genicos, sobredominantes. O numero de dias predito para a floracao de linhagens tendo somente alelos para precocidade (dominantes) e somente alelos para floracao tardia (recessivos) foram, respectivamente, 85,3 e 95,3 dias. Das quatro linhagens estudadas, a L-352 foi a que apresentou maior numero de alelos para precocidade, e a linhagem L-142, o maior numero de alelos para floracao tardia. Tanto os efeitos aditivos quanto os desvios da dominancia estao envolvidos no controle do carater, mas nao os efeitos maternos. A estimativa...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Zea mays; Milho; Floracao; Heranca; Cruzamento dialelico; Maize; Flowering time; Inheritance; Diallel crosses.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/91942
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New genes conferring resistance to Asian soybean rust: allelic testing for the Rpp2 and Rpp4 loci. Repositório Alice
LAPERUTA, L. Di C.; ARIAS, C. A. A.; RIBEIRO, A. S.; RACHID, B. F.; PIEROZZI, P. H. B.; TOLEDO, J. F. F. de; PÍPOLO, A. E.; CARNEIRO, G. E. de S..
O objetivo deste estudo foi desenvolver testes de alelismo, inclusive cruzamentos entre um grupo de genótipos resistentes à ferrugem, do banco de germoplasma de soja da Embrapa, e as duas fontes de resistência com os genes Rpp2 e Rpp4. A ferrugem-asiática-da-soja, causada pelo fungo Phakopsora pachyrhizi, tem gerado perdas significativas na produtividade da cultura e preocupado os agricultores brasileiros. Até recentemente, existiam quatro genes de resistência descritos na literatura, mas somente Rpp2 e Rpp4 continuam efetivos no Brasil. Vinte e seis fontes com resistência a P. pachyrhizi foram cruzadas com PI 230970 e PI 459025 (fontes dos genes Rpp2 e Rpp4, respectivamente), e as plantas da geração F2 foram infectadas com uma suspensão com 2,5x104...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Glycine max; Phakopsora pachyrhizi; Herança; Resistência vertical; Inheritance; Vertical resistance.
Ano: 2008 URL: http://www.alice.cnptia.embrapa.br/handle/doc/125710
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Overview of the genes of watermelon National Institute of Agronomic Research
Wehner, T.C..
Watermelon (Citrullus lanatus (Thunb.) Matsum. & Nakai) has 59 morphological and resistance gene mutants. The genes control traits that can be grouped into seed and seedling traits, vine traits, flower traits, fruit traits, and resistance traits. This article includes a review of traits that result from these genes and their interaction, as well as future research needed.
Tipo: Conference Paper Palavras-chave: Citrullus lanatus; Resistance traits; Morphological traits; Character; Molecular markers; Disease resistance; Seedling genes; Vine genes; Flower genes; Fruit genes; Phenotype; Homozygous genotypes; Inheritance; Linkage.
Ano: 2008 URL: http://hdl.handle.net/2174/195
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Prevalence of Bifid Tongue and Ankyloglossia in South Indian Population with an Emphasis on its Embryogenesis International Journal of Morphology
Rai,Rohan; Rai,Ashwin R; Rai,Rajalakshmi; Bhat,Keshav; Muralimanju,B. V.
Disturbance in the organogenesis of tongue might lead to some malformations like tongue tie, bifid tongue and hairy tongue. Severe degrees of these anomalies may cause speech impairment or periodontal defects. The present study was done on patients of the southern coastal belt of India during the past two years, on gross tongue anomalies. The results of the present study reveal that occurrence of tongue tie is 0.2% and bifid tongue is 0.3% in the southern coastal population. Since great majority of these oral anomalies have genetic basis the purpose of the present report is to highlight that these anomalies can exist without any familial background and also to suggest that environmental factor may play a role in the etiogenesis of these anomalies.
Tipo: Journal article Palavras-chave: Bifid tongue; Inheritance; Prevalence tongue anomalies; Tongue tie.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000100032
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Progress in the development of Crimson Sweet-type watermelon breeding lines with resistance to Acidovorax avenae subsp. citrulli National Institute of Agronomic Research
Hopkins, D.L.; Levi, A..
Bacterial fruit blotch (Acidovorax avenae subsp. citrulli) continues to occur almost every year and has the potential to cause a disaster for the watermelon industry. In this study, ‘Crimson Sweet’ watermelon Citrullus lanatus var. lanatus was crossed with PI 482279 and PI 494817, two Citrullus lanatus var. citroides accessions shown to be resistant to A. avenae subsp. citrulli in previous work. Disease ratings of F1 and F2 populations from these two crosses suggested that the resistance is conferred by more than one gene and that the mode of inheritance may be complex. Resistant F2 plants from each of these two crosses were used in a backcrossing program with ‘Crimson Sweet’ to obtain good horticultural characteristics in a resistant breeding line....
Tipo: Conference Paper Palavras-chave: Disease resistance; Bacterial fruit blotch; Backcrossing; Inheritance; Citrullus lanatus; Watermelon.
Ano: 2008 URL: http://hdl.handle.net/2174/206
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Protocolo de tecnologia: selecao para resistencia a doencas em hortalicas. 1. Etapas para selecao de fontes de resistencia a doencas. Infoteca-e
SANTOS, J.R.M. dos..
1999
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Hortalica; Resistencia; Doenca; Selecao; Resistencia genetica; Inoculacao; Heranca; Vegetables; Resistance; Diseases; Selection; Genetic resistantce; Inoculation; Inheritance.
Ano: 1999 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/767609
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Relationship between leaf stages and epistasis for resistance to Stagonospora nodorum in durum wheat Genet. Mol. Biol.
Bnejdi,Fethi; Saadoun,Mourad; Naouari,Mouna; El Gazzah,Mohamed.
Ten varieties and eight generations (2F1, 2F2, 2B1 and 2B2) of durum wheat derived from two crosses were evaluated for resistance to natural infection by Stagonospora nodorum blotch (SNB) at the 2-3 and 6-7 leaf stages at two sites over two years. There were significant differences in the incidence of SNB between leaf stages in most of the wheat varieties, with resistance being most evident at the 6-7 leaf stage. Separate analyses of the mean values for each generation showed that the genetic mechanism of defense against the pathogen depended upon the leaf stage. At the 2-3 leaf stage, only additive and dominance effects were implicated in the control of SNB for the two crosses at the two sites and for the two replications. For the 6-7 leaf stage,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adaptability; Inheritance; Leaf stage; Stagonospora nodorum blotch.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000300010
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