Capacidade de combinação entre linhas tetraplóides e diplóides de melancia

Souza, Flávio F. de; Queiróz, M. A. de; Dias, Rita de Cássia de S.

doi:10.1590/s0102-05362002000400029

Cited by 9 publications

(7 citation statements)

References 3 publications

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“…Sapovadiya et al (2014), who analyzed the combination ability of table watermelon, identified a significant additive effect in relation to AFW. Souza, Queiróz and Dias (2002) observed similar results for FL in diploid ant tetraploid table watermelon. Similarly, Bahari et al (2012), who studied production and fruit traits of watermelon did not observe any significance for NFP for GCA and SCA, the effects of which were observed in this study.…”

Section: Resultssupporting

confidence: 74%

COMBINING ABILITY OF FORAGE WATERMELON ( Citrullus lanatus var. citroides ) GERMPLASM

et al. 2017

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-The aim of this study was to identify parents and promising hybrid combinations for the improvement of forage watermelon. Five parents were evaluated: BGCIA 996 (1), BGCIA 997 (2), BGCIA 998 (3), BGCIA 228 (4), Jojoba (5) and ten F 1 hybrids, which were obtained from balanced diallel crosses. The experimental design was in a complete randomized block, with three replications. The morphoagronomic and bromatological traits were evaluated. The highlights were the progenitors BGCIA 997, BGCIA 998, BGCIA 228 and Jojoba for protein content, fruit yield, in vitro digestibility of dry matter and number of seeds, respectively. The hybrid 1x4 stood out for fruit length, seed number, and ethereal extract. The hybrid 2x3 stood out for rind and pulp thickness while the hybrids 3x4, 3x5 and 4x5 had exceptional digestibility, protein content and fruit yield, respectively. The analysis of the standard deviation of the SCA estimates of both SD (Sij-Sik) and SD (Sij-Skl) indicated that no hybrids were found that had SCA estimates twice that of SD (Sij-Sik) or SD (Sij-Skl), except for the hybrid 1x4 for the number of seeds per fruit. These results suggest that the parents were more promising than the hybrids. Similarly, the GCA estimates favor the intrapopulation method, which will promote greater efficiency in selection for genetic gains.Keywords: Diallel analysis. Genetic improvement of forage crops. Semiarid. CAPACIDADE DE COMBINAÇÃO EM GERMOPLASMA DE MELANCIA FORRAGEIRA (Citrullus lanatus var. citroides)RESUMO -O objetivo deste estudo foi identificar genitores e combinações híbridas promissoras para o melhoramento de melancia forrageira. Foram avaliados cinco genitores; BGCIA 996 (1), BGCIA 997 (2), BGCIA 998 (3), BGCIA 228 (4), Jojoba (5) e dez híbridos F 1 's, obtidos a partir de cruzamentos dialélicos balanceados. O delineamento experimental foi em blocos casualizados completos, com três repetições. Avaliou -se as características morfoagronômicas e bromatológicas. Destacaram-se os genitores BGCIA 997, BGCIA 998, BGCIA 228 e Jojoba, quanto ao teor de proteína, produção de frutos, digestibilidade in vitro da matéria seca e número de sementes, respectivamente. O híbrido 1x4 destacou-se para comprimento dos frutos, número de sementes e extrato etéreo. O híbrido 2x3 destacou-se para espessura de casca e polpa, enquanto os híbridos 3x4, 3x5 e 4x5 destacaram-se pela digestibilidade, teor de proteína e produção de frutos, respectivamente. A análise do desvio padrão das estimativas de CEC tanto de DP (Sij-Sik) quanto de DP(Sij-Skl) indicaram que não foram encontrados híbridos com estimativas de CEC duas vezes maiores que DP(Sij-Sik) ou DP(Sij-Skl), exceto para o híbrido 1x4 para número de sementes por fruto. Estes resultados sugerem que os progenitores foram mais promissores do que os híbridos. Da mesma forma, as estimativas da CGC favorecem o método intrapopulacional, o qual promoverá maior eficiência na seleção para ganhos genéticos.Palavras-chave: Análise dialélica. Melhoramento genético de forrageiras. Semiárido.

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Section: Resultssupporting

confidence: 74%

COMBINING ABILITY OF FORAGE WATERMELON ( Citrullus lanatus var. citroides ) GERMPLASM

et al. 2017

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“…These results indicated the importance of both additive (σ 2 A) and non-additive genetic variance including dominance (σ 2 D) in the inheritance of many yield and its component traits. There is general agreement that GCA and associated heterotic effects are important determinates of parental choice during hybrid melon development (Ferreira et al 2002;Souza et al 2002). Moreover, heterosis, as a function of performance, is often related to degree of genetic relatedness and is ramatically influenced by growing environment.The estimated values of heterosis in broad sense (h 2 b%) were (97.14%, 95.24% and 94.0%) for taste band, flesh thickness and TSS%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Genetic Behavior of Yield and Quality Traits in Sweet Melon Esmalawi Variety (Cucumis Melon –Var Agyptiacus)

Shamloul¹,

Askar²

2011

Journal of Plant Production

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The highly polymorphic in sweet melon for many commercial traits providing seemingly endless possibilities for genetic improvement. The main objective of current study was to estimate of genetic behavior and obtain the genetic parameters of sweet melon advanced lines (Cucumis melo L. var. aegyptiacus). Eight inbred lines were developed from previous study using a pedigree selection method. The selected inbred lines were crossed according to factorial mating design generated 16 crosses. The additive genetic variance played an important role in the inheritance of yield and most yield component traits. Female variance (σ 2 f) appeared to be larger than male variance (σ 2 m) for the most quality traits except for taste. The magnitudes of additive genetic variance (σ 2 A) were lower than their non-additive including dominance (σ 2 D) for all studied yield traits, except for number of male flowers per plant and fruit length. The MAGD105, MAGD106 and MAGD107 are promising lines that could be used in farther improvement programs.

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“…Xiao et al (1996) demonstrated that the close relationship between genetic diversity of hybrids performance and heterosis in rice (Orzya sativa L. iaponica and Orzya sativa L. indica). There is general agreement that GCA and associated heterotic effects are important determinates of parental choice during hybrid melon development (Ferreira et al 2002;Souza et al 2002). Moreover, heterosis, as a function of performance, is often related to degree of genetic relatedness [i.e., genetic distance (GD)] and is dramatically influenced by growing environment.…”

Section: Introductionmentioning

confidence: 99%

Performance of melon hybrids derived from parents of diverse geographic Origins

Luan

Sheng

Wang³

et al. 2010

Euphytica

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Genetic relatedness and phenotype are important factors that govern the expression of heterosis in hybrid progeny of many cross-pollinating plant species. Since this relationship is important but not well understood in melon (Cucumis melo L.), one monoecious and two andromonoecious melon lines of diverse Chinese [Peoples Republic of China (PRC)] origin were crossed to the andromonoecious U.S. Western Shipping market type 'Top Mark' (TM) and the andromonoecious, highly branched line H-16 to determine parental combining ability and heterosis for five yield component traits in three test environments [open-field (USA), and energy-saving (PRC) and plastic greenhouses (PRC)]. Random amplified polymorphic DNA (RAPD)-and simple sequence repeat (SSR)-based genetic distances (GD) among and between parents (5) and their hybrids (6) were calculated and compared to phenotypic trait values. These germplasms were evaluated for lateral branch number (LBN), days to 50% flower (DF), fruit number and weight per plant, and fruit length:diameter (L:D) ratio in each of three test environments. General combining ability was significant for all characters, except for L:D in all locations, and LBN and DF in the plastic greenhouse environment. Both descriptors of difference (genetic marker and phenotype) were discriminatory, and provided similar assessments of relationships among parents and hybrids. Although dramatic performance differences were detected between parents and among F 1 hybrid progeny, a strong relationship between GD and heterotic effects was not consistently detected.

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Capacidade de combinação entre linhas tetraplóides e diplóides de melancia

Cited by 9 publications

References 3 publications

COMBINING ABILITY OF FORAGE WATERMELON ( Citrullus lanatus var. citroides ) GERMPLASM

COMBINING ABILITY OF FORAGE WATERMELON ( Citrullus lanatus var. citroides ) GERMPLASM

Genetic Behavior of Yield and Quality Traits in Sweet Melon Esmalawi Variety (Cucumis Melon –Var Agyptiacus)

Performance of melon hybrids derived from parents of diverse geographic Origins

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