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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
23/01/2007 |
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Data da última atualização: |
10/08/2017 |
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Tipo da produção científica: |
Orientação de Tese de Pós-Graduação |
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Autoria: |
ZAMBRINI, F. N. |
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Título: |
Dinâmica ovulatória e inseminação artificial em tempo pré-determinado em cabras com estro induzido. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
2006. |
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Páginas: |
44 f. |
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Idioma: |
Português |
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Notas: |
Dissertação (Mestrado em Medicina Veterinária) - Universidade Federal de Viçosa, Viçosa, MG. Orientador: Eduardo Paulino da Costa; Co-orientador: Jeferson Ferreira da Fonseca (Embrapa Caprinos). |
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Conteúdo: |
Resumo: Estudou-se com 90 cabras da raga Toggenburg de tres diferentes categorias (lactantes, nao lactantes e nuliparas) 0 efeito da induçao hormonal nos seguintes parametros: 0 intervalo media do final do tratamento hormonal ao inicio do estro (IE), a duraçao media do estro (DE) e a taxa de gestaçao (TG). Todas as cabras utilizadas no estudo foram submetidas a uma pre-indugao de estro pelo fotoperiodo artificial par 60 dias (14 de luz e 10 de escuro), e as induçoes hormonais ocorreram em tres etapas, com 65, 73 e 100 dias apos 0 termino do tratamento com luz. A induçao hormonal consistiu no uso de esponjas intravaginais contendo 60 mg de acetato de medroxiprogesterona (MAP, dia 0) por seis dias, na administraçao intravulvo-submucosal de 37 ,5 mg de prostaglandina sintetica, e intramuscular de 200 UI de eCG (Dia 4). Nos animais de T1 e T2 as esponjas foram inseridas e removidas e os harmonios administrados sempre pela manha, e nos de T3 pela tarde. As cabras pertencentes ao T1 foram inseminadas 11,3 + 4,0 h apos 0 inicio do estro, e aquelas que permaneceram em estro receberam uma segunda inseminaçao com 35,2 + 6,0 h, as do T2 e T3 receberam duas doses de semen cada, sendo estas em tempo fixo com relaçao a remoçao da esponja, correspondendo a 35,0 + 2,2 h e 58,2 + 2,1 h em T2, e 46,3 + 1,4 h e 66,1 + 2,3 h em T3. Quanto ao intervalo estro 1a inseminaçao e estro 2a inseminaçao em T2 foi de -10,7+ 18,9 h e 12,5 + 19,5 h, e T3 -8,3 + 25,4 h e 14,4 + 24,4 h. Houve diferença significativa (P< 0,05) com relaçao aos intervalos 1 alA, estro 1 alA, 2alA e estro 2alA em funçao dos tratamentos. A percentagem de animais em estro tambem diferiu (P< 0,05) entre os tratamentos sendo, T1 64,3%, T2 96,1 % e T3 65,5%. 0 IE foi em media 49,0 :t 22,0 h e a DE 32,5 :t 19,6 h, nao ocorrendo diferença entre categorias e tratamentos (P> 0,05), mas sim com relaçao ao grupo de induçao de estro, sendo IE e DE de 30,8 :t 12,9 h e 40,2 :t 25,0 em GI, 54, 8 :t 13,9 h e 32,3 :t 13,3 h em GII, e 66,7+ 23,2 h e 21,7+ 13,3 h em Gill (P< 0,05). Detectou-se uma correlaç:ao negativa (r-O,47) entre DE e IE (P< 0,05). A TG foi de 21,0% em T1, 30,8% em T2 e 34,5% em T3, nao havendo diferenç:a (P> 0,05). Intervalo da retirada da esponja a Qvulaçao (10), intervalo do estro a ovulaçao (IEO) e intervalo das inseminaçoes a ovulaçao. Foi feito 0 monitoramento ultrassonografico transretal com auxilio de uma probe de 5 MHZ de 30 animais, sendo 10 de cada tratamento do 1° grupo de I induçao de estro, a cada oito horas a partir da retirada da esponja ate a ovulaçao. 0 10 nao apresentou diferença (P> 0,05) entre os tratamentos e categorias, sendo 49,9+ 8,2 h, 54,4 + 10,1 h e 53,4+ 12,3 h para T1, T2 e T3, respectivamente. 0 IEO tambem nao diferiu (P> 0,01), sendo 24,3 + 6,7 h, 23,7 + 12,3 h e 18,1 + 26,3 h. Atraves desse monitoramento pudemos observar que as inseminaçoes foram feitas com -12,1 + 10,6 h e 11 ,4+ 7,9 h em T1, -18,0 + 10,6 h e 10,6 + 12,4 h em T2, e -6,4 + 12,6 h e 10,6 + 12,4 h em T3, nao havendo diferença (P> 0,05) com relaçao aos tratamentos. A taxa de ovulaçao foi de 80% em T1, 100% em T2 e 100% em T3, mostrando-se ser um bom protocolo para induçao de estro em cabras fora da estaçao reprodutiva. Com esses dados sabre ovulaçao pode-se ajustar o protocolo de IA TF, obtendo-se melhores resultados. Abstract: The effect of the hormonal induction was studied with 90 goats of the Toggenburg breed of three different categories (lactating, not lactating and nulliparous), in the following parameters: the average interval of the end of the hormonal treatment to the beginning of estrous (IE), the average duration of estrous (DE) and the gestation rate (GR). All the goats used in the study had been submitted to an pre-induction of estrous by artificial photoperiod per 60 days (14 of light and 10 of dark), and the hormonal inductions had occurred in three stages, with 65, 73 and 100 days after the end of the treatment with light. The hormonal induction consisted in the use of intravaginal sponges contends 60 mg of acetate of medroxiprogesterone (MAP, Day 0) per six days, in the intravulvo-submucosal administration of 37,5 μg of synthetic prostaglandin, and in 200 UI of eCG (Day 4) intramuscular . In the animals of T1 and T2 the sponges were inserted and had been removed and hormones managed always in the morning and in the ones of T3 in the afternoon. The goats of T1 had been inseminated 11,3 ± 4,0 h after the beginning of estrous, and those that remained in estrous received a second insemination with 35,2 ± 6,0 h, those of T2 and T3 received two doses of semen each, witch these in fixed time with regard to the removal of the sponge, corresponding the 35,0 ± 2,2 h and 58,2 ± 2,1 h in T2, and 46,3 ± 1,4 h and 66,1 ± 2,3 h in T3. About to the interval estrous 1st insemination and estrous 2nd insemination in T2 was -10,7 ± 18,9 h and 12,5 ± 19,5 h, and T3 -8,3 ± 25,4 h and 14,4 ± 24.4 h. It had significant difference (P< 0,05) with relation to the intervals 1stAI, estrous 1stAI, 2ndAI and estrous 2ndAI in function of the treatments. The percentage of animals in estrous also differed (P< 0,05) between the treatments, T1 64,3 %, T2 96,1 % and T3 65,5 %. The IE was on 49,0 ± 22,0 h and DF 32,5 ± 19,6 h, not occurring difference between categories and treatments (P> 0,05), but yes with regard to the group of induction of estrous, being IE and DF 30,8 ± 12,9 h and 40,2 ± 25,0 in GI, 54,8 ± 13,9 h and 32,3 ± 13,3 h in GII, and 66,7 ± 23,2 h and 21,7 ± 13,3 h in GIII (P< 0,05). A negative correlation was detected (r-0,47) enters DF and IE (P< 0,05). The GR was of 21,0 % in T1, 30.8 % in T2 and 34.5 % in T3, not having difference (P> 0,05). (2) Interval from sponge removal to ovulation (IO), interval from estrous to ovulation (IEO) and interval from inseminations to ovulation. The transrectal ultrasonografic monitoring was made with a probe of 5 MHZ in 30 animals, witch 10 of each treatment of 1st group estrous induction, to each six hours from the sponge removal until the ovulation. The IO did not present difference (P> 0,05) between the treatments and categories, being 49,9 ± 8,2 h, 54,4 ± 10,1 h and 53,4 ± 12,3 h for T1, T2 and T3, respectively. The IEO also did not differ (P> 0,01), being 24,3 ± 6,7 h, 23,7 ± 12,3 h and 18,1 ± 26,3 h. through this monitoring we could observe that the inseminations had been made with - 12,1 ± 10,6 h and 11,4± 7,9 h in T1, -18,0 ± 10,6 h and 10,6 ± 12,4 h in T2, and - 6,4 ± 12,6 h and 10,6 ± 12,4 h in T3, not having difference (P> 0,05) in relation to the treatments. The ovulation rate was of 80 in T1, 100% in T2 and 100% in T3, revealing to be a good protocol for induction of estrous in goats out of the reproductive season. With these data about ovulation the TAI protocol could be adjusted, getting better results. MenosResumo: Estudou-se com 90 cabras da raga Toggenburg de tres diferentes categorias (lactantes, nao lactantes e nuliparas) 0 efeito da induçao hormonal nos seguintes parametros: 0 intervalo media do final do tratamento hormonal ao inicio do estro (IE), a duraçao media do estro (DE) e a taxa de gestaçao (TG). Todas as cabras utilizadas no estudo foram submetidas a uma pre-indugao de estro pelo fotoperiodo artificial par 60 dias (14 de luz e 10 de escuro), e as induçoes hormonais ocorreram em tres etapas, com 65, 73 e 100 dias apos 0 termino do tratamento com luz. A induçao hormonal consistiu no uso de esponjas intravaginais contendo 60 mg de acetato de medroxiprogesterona (MAP, dia 0) por seis dias, na administraçao intravulvo-submucosal de 37 ,5 mg de prostaglandina sintetica, e intramuscular de 200 UI de eCG (Dia 4). Nos animais de T1 e T2 as esponjas foram inseridas e removidas e os harmonios administrados sempre pela manha, e nos de T3 pela tarde. As cabras pertencentes ao T1 foram inseminadas 11,3 + 4,0 h apos 0 inicio do estro, e aquelas que permaneceram em estro receberam uma segunda inseminaçao com 35,2 + 6,0 h, as do T2 e T3 receberam duas doses de semen cada, sendo estas em tempo fixo com relaçao a remoçao da esponja, correspondendo a 35,0 + 2,2 h e 58,2 + 2,1 h em T2, e 46,3 + 1,4 h e 66,1 + 2,3 h em T3. Quanto ao intervalo estro 1a inseminaçao e estro 2a inseminaçao em T2 foi de -10,7+ 18,9 h e 12,5 + 19,5 h, e T3 -8,3 + 25,4 h e 14,4 + 24,4 h. Houve diferença signi... Mostrar Tudo |
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Palavras-Chave: |
Raça Toggenburg. |
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Thesagro: |
Cabra; Caprino; Ciclo estral; Endocrinologia; Hormônio; Indução; Inseminação artificial; Ovário. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/162615/1/CNPC-2006-Dinamica.pdf
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Marc: |
LEADER 07740nam a2200241 a 4500
001 1532785
005 2017-08-10
008 2006 bl uuuu m 00u1 u #d
100 1 $aZAMBRINI, F. N.
245 $aDinâmica ovulatória e inseminação artificial em tempo pré-determinado em cabras com estro induzido.
260 $a2006.$c2006
300 $a44 f.
500 $aDissertação (Mestrado em Medicina Veterinária) - Universidade Federal de Viçosa, Viçosa, MG. Orientador: Eduardo Paulino da Costa; Co-orientador: Jeferson Ferreira da Fonseca (Embrapa Caprinos).
520 $aResumo: Estudou-se com 90 cabras da raga Toggenburg de tres diferentes categorias (lactantes, nao lactantes e nuliparas) 0 efeito da induçao hormonal nos seguintes parametros: 0 intervalo media do final do tratamento hormonal ao inicio do estro (IE), a duraçao media do estro (DE) e a taxa de gestaçao (TG). Todas as cabras utilizadas no estudo foram submetidas a uma pre-indugao de estro pelo fotoperiodo artificial par 60 dias (14 de luz e 10 de escuro), e as induçoes hormonais ocorreram em tres etapas, com 65, 73 e 100 dias apos 0 termino do tratamento com luz. A induçao hormonal consistiu no uso de esponjas intravaginais contendo 60 mg de acetato de medroxiprogesterona (MAP, dia 0) por seis dias, na administraçao intravulvo-submucosal de 37 ,5 mg de prostaglandina sintetica, e intramuscular de 200 UI de eCG (Dia 4). Nos animais de T1 e T2 as esponjas foram inseridas e removidas e os harmonios administrados sempre pela manha, e nos de T3 pela tarde. As cabras pertencentes ao T1 foram inseminadas 11,3 + 4,0 h apos 0 inicio do estro, e aquelas que permaneceram em estro receberam uma segunda inseminaçao com 35,2 + 6,0 h, as do T2 e T3 receberam duas doses de semen cada, sendo estas em tempo fixo com relaçao a remoçao da esponja, correspondendo a 35,0 + 2,2 h e 58,2 + 2,1 h em T2, e 46,3 + 1,4 h e 66,1 + 2,3 h em T3. Quanto ao intervalo estro 1a inseminaçao e estro 2a inseminaçao em T2 foi de -10,7+ 18,9 h e 12,5 + 19,5 h, e T3 -8,3 + 25,4 h e 14,4 + 24,4 h. Houve diferença significativa (P< 0,05) com relaçao aos intervalos 1 alA, estro 1 alA, 2alA e estro 2alA em funçao dos tratamentos. A percentagem de animais em estro tambem diferiu (P< 0,05) entre os tratamentos sendo, T1 64,3%, T2 96,1 % e T3 65,5%. 0 IE foi em media 49,0 :t 22,0 h e a DE 32,5 :t 19,6 h, nao ocorrendo diferença entre categorias e tratamentos (P> 0,05), mas sim com relaçao ao grupo de induçao de estro, sendo IE e DE de 30,8 :t 12,9 h e 40,2 :t 25,0 em GI, 54, 8 :t 13,9 h e 32,3 :t 13,3 h em GII, e 66,7+ 23,2 h e 21,7+ 13,3 h em Gill (P< 0,05). Detectou-se uma correlaç:ao negativa (r-O,47) entre DE e IE (P< 0,05). A TG foi de 21,0% em T1, 30,8% em T2 e 34,5% em T3, nao havendo diferenç:a (P> 0,05). Intervalo da retirada da esponja a Qvulaçao (10), intervalo do estro a ovulaçao (IEO) e intervalo das inseminaçoes a ovulaçao. Foi feito 0 monitoramento ultrassonografico transretal com auxilio de uma probe de 5 MHZ de 30 animais, sendo 10 de cada tratamento do 1° grupo de I induçao de estro, a cada oito horas a partir da retirada da esponja ate a ovulaçao. 0 10 nao apresentou diferença (P> 0,05) entre os tratamentos e categorias, sendo 49,9+ 8,2 h, 54,4 + 10,1 h e 53,4+ 12,3 h para T1, T2 e T3, respectivamente. 0 IEO tambem nao diferiu (P> 0,01), sendo 24,3 + 6,7 h, 23,7 + 12,3 h e 18,1 + 26,3 h. Atraves desse monitoramento pudemos observar que as inseminaçoes foram feitas com -12,1 + 10,6 h e 11 ,4+ 7,9 h em T1, -18,0 + 10,6 h e 10,6 + 12,4 h em T2, e -6,4 + 12,6 h e 10,6 + 12,4 h em T3, nao havendo diferença (P> 0,05) com relaçao aos tratamentos. A taxa de ovulaçao foi de 80% em T1, 100% em T2 e 100% em T3, mostrando-se ser um bom protocolo para induçao de estro em cabras fora da estaçao reprodutiva. Com esses dados sabre ovulaçao pode-se ajustar o protocolo de IA TF, obtendo-se melhores resultados. Abstract: The effect of the hormonal induction was studied with 90 goats of the Toggenburg breed of three different categories (lactating, not lactating and nulliparous), in the following parameters: the average interval of the end of the hormonal treatment to the beginning of estrous (IE), the average duration of estrous (DE) and the gestation rate (GR). All the goats used in the study had been submitted to an pre-induction of estrous by artificial photoperiod per 60 days (14 of light and 10 of dark), and the hormonal inductions had occurred in three stages, with 65, 73 and 100 days after the end of the treatment with light. The hormonal induction consisted in the use of intravaginal sponges contends 60 mg of acetate of medroxiprogesterone (MAP, Day 0) per six days, in the intravulvo-submucosal administration of 37,5 μg of synthetic prostaglandin, and in 200 UI of eCG (Day 4) intramuscular . In the animals of T1 and T2 the sponges were inserted and had been removed and hormones managed always in the morning and in the ones of T3 in the afternoon. The goats of T1 had been inseminated 11,3 ± 4,0 h after the beginning of estrous, and those that remained in estrous received a second insemination with 35,2 ± 6,0 h, those of T2 and T3 received two doses of semen each, witch these in fixed time with regard to the removal of the sponge, corresponding the 35,0 ± 2,2 h and 58,2 ± 2,1 h in T2, and 46,3 ± 1,4 h and 66,1 ± 2,3 h in T3. About to the interval estrous 1st insemination and estrous 2nd insemination in T2 was -10,7 ± 18,9 h and 12,5 ± 19,5 h, and T3 -8,3 ± 25,4 h and 14,4 ± 24.4 h. It had significant difference (P< 0,05) with relation to the intervals 1stAI, estrous 1stAI, 2ndAI and estrous 2ndAI in function of the treatments. The percentage of animals in estrous also differed (P< 0,05) between the treatments, T1 64,3 %, T2 96,1 % and T3 65,5 %. The IE was on 49,0 ± 22,0 h and DF 32,5 ± 19,6 h, not occurring difference between categories and treatments (P> 0,05), but yes with regard to the group of induction of estrous, being IE and DF 30,8 ± 12,9 h and 40,2 ± 25,0 in GI, 54,8 ± 13,9 h and 32,3 ± 13,3 h in GII, and 66,7 ± 23,2 h and 21,7 ± 13,3 h in GIII (P< 0,05). A negative correlation was detected (r-0,47) enters DF and IE (P< 0,05). The GR was of 21,0 % in T1, 30.8 % in T2 and 34.5 % in T3, not having difference (P> 0,05). (2) Interval from sponge removal to ovulation (IO), interval from estrous to ovulation (IEO) and interval from inseminations to ovulation. The transrectal ultrasonografic monitoring was made with a probe of 5 MHZ in 30 animals, witch 10 of each treatment of 1st group estrous induction, to each six hours from the sponge removal until the ovulation. The IO did not present difference (P> 0,05) between the treatments and categories, being 49,9 ± 8,2 h, 54,4 ± 10,1 h and 53,4 ± 12,3 h for T1, T2 and T3, respectively. The IEO also did not differ (P> 0,01), being 24,3 ± 6,7 h, 23,7 ± 12,3 h and 18,1 ± 26,3 h. through this monitoring we could observe that the inseminations had been made with - 12,1 ± 10,6 h and 11,4± 7,9 h in T1, -18,0 ± 10,6 h and 10,6 ± 12,4 h in T2, and - 6,4 ± 12,6 h and 10,6 ± 12,4 h in T3, not having difference (P> 0,05) in relation to the treatments. The ovulation rate was of 80 in T1, 100% in T2 and 100% in T3, revealing to be a good protocol for induction of estrous in goats out of the reproductive season. With these data about ovulation the TAI protocol could be adjusted, getting better results.
650 $aCabra
650 $aCaprino
650 $aCiclo estral
650 $aEndocrinologia
650 $aHormônio
650 $aIndução
650 $aInseminação artificial
650 $aOvário
653 $aRaça Toggenburg
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Embrapa Caprinos e Ovinos (CNPC) |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
26/01/2018 |
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Data da última atualização: |
26/01/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
TERRA, T. G. R.; LEAL, T. C. A. de B.; RANGEL, P. H. N.; BORÉM, A. |
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Afiliação: |
THIAGO GLEDSON RIOS TERRA, UNIVERSIDADE FEDERAL DO TOCANTINS; TARCISIO CASTRO ALVES DE BARROS LEAL, UNIVERSIDADE FEDERAL DO TOCANTINS; PAULO HIDEO NAKANO RANGEL, CNPAF; ALUÍZIO BOREM, UNIVERSIDADE FEDERAL DE VIÇOSA. |
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Título: |
Phenotypic correlation and path analysis in cultivars and strains of upland rice for drought tolerance. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Bioscience Journal, Uberlândia, v. 33, n. 6, p. 1474-1484, Nov./Dec. 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
The purpose of this study was to estimate the phenotypic correlations between 14 traits obtainedin a thematic core collection of upland rice for drought tolerance and partition them into direct and indirect effects by path analysis. Two experiments were carried out (with and without water stress). One hundred samples were evaluated in a triple 10x10 lattice design. The plot was formed by four rows, 3.0 metres long, spaced at 0.35 m. The plot useful area was constituted by two central rows of 2.0 m in length, totalling 1.4 m2, where data from 14 traits were collected, five from the root system and nine from the aerial part of the plant. Of the evaluated traits, spikelet sterility was the main grain yield determinant, presenting relevant negative correlations of -0.77 and -0.59 in environments with and without drought stress, respectively. The partitioning of spikelet sterility correlations presented negative direct effects on grain yield in environments with (-0.60) and without (-0.62) water stress, corroborating the negative correlations between these traits. The obtained data confirmed that spikelet sterility is an important variable for the selection of rice strain submitted to water deficit. Partial correlation coefficients indicated that only 70.33% in the environment with stress and 50.30% in the environment without stress of grain yield variation were phenotypically explained by variables considered in path analysis, thereby showing the complexity of the selection for drought-tolerant rice. MenosThe purpose of this study was to estimate the phenotypic correlations between 14 traits obtainedin a thematic core collection of upland rice for drought tolerance and partition them into direct and indirect effects by path analysis. Two experiments were carried out (with and without water stress). One hundred samples were evaluated in a triple 10x10 lattice design. The plot was formed by four rows, 3.0 metres long, spaced at 0.35 m. The plot useful area was constituted by two central rows of 2.0 m in length, totalling 1.4 m2, where data from 14 traits were collected, five from the root system and nine from the aerial part of the plant. Of the evaluated traits, spikelet sterility was the main grain yield determinant, presenting relevant negative correlations of -0.77 and -0.59 in environments with and without drought stress, respectively. The partitioning of spikelet sterility correlations presented negative direct effects on grain yield in environments with (-0.60) and without (-0.62) water stress, corroborating the negative correlations between these traits. The obtained data confirmed that spikelet sterility is an important variable for the selection of rice strain submitted to water deficit. Partial correlation coefficients indicated that only 70.33% in the environment with stress and 50.30% in the environment without stress of grain yield variation were phenotypically explained by variables considered in path analysis, thereby showing the complexity of the selection for ... Mostrar Tudo |
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Thesagro: |
Arroz; Melhoramento genético vegetal; Oryza sativa; Resistência a seca. |
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Thesaurus NAL: |
Drought tolerance; Rice; Roots. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/171731/1/CNPAF-2017-bj.pdf
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Marc: |
LEADER 02256naa a2200241 a 4500
001 2086481
005 2018-01-26
008 2017 bl uuuu u00u1 u #d
100 1 $aTERRA, T. G. R.
245 $aPhenotypic correlation and path analysis in cultivars and strains of upland rice for drought tolerance.$h[electronic resource]
260 $c2017
520 $aThe purpose of this study was to estimate the phenotypic correlations between 14 traits obtainedin a thematic core collection of upland rice for drought tolerance and partition them into direct and indirect effects by path analysis. Two experiments were carried out (with and without water stress). One hundred samples were evaluated in a triple 10x10 lattice design. The plot was formed by four rows, 3.0 metres long, spaced at 0.35 m. The plot useful area was constituted by two central rows of 2.0 m in length, totalling 1.4 m2, where data from 14 traits were collected, five from the root system and nine from the aerial part of the plant. Of the evaluated traits, spikelet sterility was the main grain yield determinant, presenting relevant negative correlations of -0.77 and -0.59 in environments with and without drought stress, respectively. The partitioning of spikelet sterility correlations presented negative direct effects on grain yield in environments with (-0.60) and without (-0.62) water stress, corroborating the negative correlations between these traits. The obtained data confirmed that spikelet sterility is an important variable for the selection of rice strain submitted to water deficit. Partial correlation coefficients indicated that only 70.33% in the environment with stress and 50.30% in the environment without stress of grain yield variation were phenotypically explained by variables considered in path analysis, thereby showing the complexity of the selection for drought-tolerant rice.
650 $aDrought tolerance
650 $aRice
650 $aRoots
650 $aArroz
650 $aMelhoramento genético vegetal
650 $aOryza sativa
650 $aResistência a seca
700 1 $aLEAL, T. C. A. de B.
700 1 $aRANGEL, P. H. N.
700 1 $aBORÉM, A.
773 $tBioscience Journal, Uberlândia$gv. 33, n. 6, p. 1474-1484, Nov./Dec. 2017.
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