Potencial de híbridos e populações segregantes de abóbora para teor de óleo nas sementes e plantas com crescimento do tipo moita

Laurindo, Renata Dias Freitas; Laurindo, Bruno Soares; Delazari, Fábio Teixeira; Carneiro, Pedro Crescêncio de Souza; Silva, Derly José Henriques da

doi:10.1590/0034-737x201764060004

Cited by 9 publications

(8 citation statements)

References 22 publications

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“…The occurrence of transgressive segregants was observed for most characteristics, except for the chlorophyll content. In accordance with Laurindo et al (2017), the occurrence of transgressive segregants highlights the occurrence of different alleles among parents and still allows for the selection of superior individuals for the characteristic.…”

Section: Resultsmentioning

confidence: 92%

Estimates of genetic parameters of pigments and agronomic traits in green and purple lettuce

et al. 2019

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Understanding genetics and the gene interactions involved in the expression of certain characteristics becomes a determining factor for better exploration of its use. The development of breeding programs that combine one or more desirable trait into a single cultivar is directly impacted by this lack of knowledge of the genetic bases involved. The objective of the present study was to estimate the genetic parameters involved in pigment expression and agronomic characteristics in lettuce. Parental evaluations of lettuce, P1 (green) and P2 (purple) parental generations, the segregating generations F1 and F2, and the backcrosses Bc1 and Bc2 originating from the UFU-Crespa199#1#1 x UFU-Albina#2 crossing were evaluated. The chlorophyll and anthocyanin contents, number of leaves and plant diameter were evaluated. The study was conducted by testing all generations and the estimates obtained by averages and variances. Indications of polygenic or oligogenic inheritance were verified by the characteristic number of leaves, plant diameter, and anthocyanin content. The complete and additive-dominant models satisfactorily explained the performance of the variables, except the anthocyanin content.

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Section: Resultsmentioning

confidence: 92%

Estimates of genetic parameters of pigments and agronomic traits in green and purple lettuce

et al. 2019

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“…Most of the C. moschata germplasm shows vigorous growth and indeterminate growth habit [45]. Thus, C. moschata plants commonly occupy a large areas of cultivated land, making it difficult to evaluate their germplasm in experimental designs, such as in randomised blocks.…”

Section: Discussionmentioning

confidence: 99%

Germplasm of Brazilian winter squash (Cucurbita moschataD.) displays vast genetic variability, allowing identification of promising genotypes for agro-morphological traits

Gomes

Júnior

Almeida

et al. 2020

Preprint

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13Winter squash fruits (Cucurbita moschata D.) are among the best sources of vitamin A 14 precursors and constitute sources of bioactive components such as phenolic compounds and 15 flavonoids. Approximately 70% of C. moschata seed oil is made up of unsaturated fatty acids, 16 with high levels of monounsaturated fatty acids and components such as vitamin E and 17 carotenoids, which represent a promising nutritional aspect in the production of this vegetable. 18C. moschata germplasm expresses high genetic variability, especially in Brazil. We assessed 91 19 C. moschata accessions, from different regions of Brazil, and maintained at the UFV Vegetable 20 Germplasm Bank, to identify early-flowering accessions with high levels of carotenoids in the 21 fruit pulp and high yields of seed and seed oil. Results showed that the accessions have high 22 variability in the number and mass of seeds per fruit, number of accumulated degree-days for 23 flowering, total carotenoid content, and fruit productivity, which allowed selection for 24 considerable gains in these characteristics. Analysis of the correlation between these 25 characteristics provided information that will assist in selection to improve this crop. Cluster 26 analysis resulted in the formation of 16 groups, confirming the variability of the accessions. Per 27 se analysis identified accessions BGH-6749, BGH-5639, and BGH-219 as those with the earliest 28flowering. Accessions BGH-5455A and BGH-5598A had the highest carotenoid content, with 29 averages greater than 170.00 μg g -1 of fresh mass. With a productivity of 0.13 t ha -1 , accessions 30 BGH-5485A, BGH-4610A, and BGH-5472A were the most promising for seed oil production. 31These last two accessions corresponded to those with higher seed productivity, averaging 0.58 2 32 and 0.54 t ha -1 , respectively. This study confirms the high potential of this germplasm for use in 33 breeding for promotion of earlier flowering and increase in total carotenoid content of the fruit 34 pulp and in seed and seed oil productivity. 35 36 38 39 3 65 making this crop fundamental for ensuring healthier diets and promoting food security in the 66 regions where it is grown, particularly in less developed regions and in the context of family-67 based farming. 68 Associated with its socio-economic importance, C. moschata germplasm commonly expresses 69 high genetic variability in all regions where it occurs [15, 16, 17], especially in Brazil [18, 19, 70 20]. Archaeological evidence indicates that this species was present in Latin America prior to 71 colonisation, and appears to have already been an important component in the diet of the native 72 peoples living there [21, 22, 23]. Currently, the variability of this vegetable in Brazil is closely 73 tied to the human populations involved in its cultivation, who are predominantly family-based 74 farmers. The selection practised over time by these populations, associated with the exchange of 75 seeds between them, and the natural occurrence of hybridization in the germplasm of th...

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“…Most of the C. moschata germplasm express vigorous growth and indeterminate growth habit [50], and C. moschata plants commonly occupy a large area of cultivated land, making it difficult to phenotypically assess its germplasm in experimental designs such as in randomised blocks. The main limitation in the evaluation of C. moschata germplasm in randomised blocks is the difficulty of ensuring satisfactory homogeneity throughout the experimental area.…”

Section: Variance Components and Genetic-statistical Parameters Of Thmentioning

confidence: 99%

“…According to [89], the Bu gene, identified as being responsible for the formation of shorter internodes in pumpkins, is also linked to earlier flowering in this species. In a study evaluating hybrids and segregating winter squash populations for oil production and plant size reduction [50], the cultivars Piramoita and Tronco Verde, which have determinate growth habits, displayed the smallest number of days for female flowering. Greater precocity is an important characteristic for most crops, especially in the cultivation of vegetables, as it optimises the use of cultivation areas, reduces the risks of exposure of the crop to adverse abiotic and biotic factors, and reduces management costs.…”

Section: Identification Of Promising Groups Of Genotypesmentioning

confidence: 99%

Brazilian germplasm of winter squash (Cucurbita moschata D.) displays vast genetic variability, allowing identification of promising genotypes for agro-morphological traits

et al. 2020

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Winter squash fruits (Cucurbita moschata D.) are among the best sources of vitamin A precursors and constitute sources of bioactive components such as phenolic compounds and flavonoids. Approximately 70% of C. moschata seed oil is made up of unsaturated fatty acids, with high levels of monounsaturated fatty acids and components such as vitamin E and carotenoids, which represent a promising nutritional aspect in the production of this vegetable. C. moschata germplasm expresses high genetic variability, especially in Brazil. We assessed 91 C. moschata accessions, from different regions of Brazil, and maintained at the Federal University of Viçosa (UFV) Vegetable Germplasm Bank, to identify early-flowering accessions with high levels of carotenoids in the fruit pulp and high yields of seed and seed oil. Results showed that the accessions have high variability in the number and mass of seeds per fruit, number of accumulated degree-days for flowering, total carotenoid content, and fruit productivity, which allowed selection for considerable gains in these characteristics. Analysis of the correlation between these characteristics provided information that will assist in selection to improve this crop. Cluster analysis resulted in the formation of 16 groups, confirming the variability of the accessions. Per se analysis identified accessions BGH-6749, BGH-5639, and BGH-219 as those with the earliest flowering. Accessions BGH-5455A and BGH-5598A had the highest carotenoid content, with averages greater than 170.00 μg g-1 of fresh mass. With a productivity of 0.13 t ha-1 , accessions BGH-5485A, BGH-4610A, and BGH-5472A were the most promising for seed oil production. These last two accessions corresponded to those with higher seed productivity, averaging 0.58 and 0.54 t ha-1 , respectively. This study confirms the high potential of this germplasm for use in breeding for promotion of earlier flowering and increase in total content of fruit pulp carotenoids and in seed and seed oil productivity.

show abstract

Potencial de híbridos e populações segregantes de abóbora para teor de óleo nas sementes e plantas com crescimento do tipo moita

Cited by 9 publications

References 22 publications

Estimates of genetic parameters of pigments and agronomic traits in green and purple lettuce

Estimates of genetic parameters of pigments and agronomic traits in green and purple lettuce

Germplasm of Brazilian winter squash (Cucurbita moschataD.) displays vast genetic variability, allowing identification of promising genotypes for agro-morphological traits

Brazilian germplasm of winter squash (Cucurbita moschata D.) displays vast genetic variability, allowing identification of promising genotypes for agro-morphological traits

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