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| Registros recuperados: 24 | |
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| 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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| 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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| 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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| 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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| 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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| 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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| 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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| 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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| Paris, H.S.. |
| Longitudinal striping is a common fruit color pattern in squash, pumpkins, and gourds of Cucurbita pepo, but cultigens can exhibit different kinds of fruit striping. Often, the stripes are broad and contiguous, but in some cases they are narrow and non-contiguous (“broken”) or, much more rarely, they can have an irregular distribution. These three striping phenotypes have been described and compared, and have been found to be under the control of alleles at the l-1 locus. Ordinarily, dark stripes appear between the 10 main subepidermal vascular tracts with the background color covering the rest of the fruit. Less commonly, the striping is “reversed”, that is, lighter than the background color. To my knowledge, narrow, non-contiguous reversed striping and... |
| Tipo: Conference Paper |
Palavras-chave: Pumpkin; Fruit color pattern; Squash; Color genetics; Inheritance; Genotype; Cucurbita pepo. |
| Ano: 2008 |
URL: http://hdl.handle.net/2174/197 |
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| Registros recuperados: 24 | |
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