Understanding the genetic variability, heritability and association pattern for the characters related to reproductive phase of carrots (Daucus carota L.) in tropical region

Manikanta, D. S.; Chaitra, A. Poleshi; Cholin, Sarvamangala

doi:10.37855/jah.2018.v20i03.39

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…This carrot flowering ontology attempts to capture this diverse range of flowering variation with additional categories based on perceived usefulness. High broad sense heritability for flowering reported in our study is similar to estimations in other carrot germplasm collections (Manikanta et al, 2018), and consistent with documented simple inheritance of flowering habit in carrot, with two recessive loci conditioning biennial habit (Alessandro & Galmarini, 2007;Alessandro et al, 2013;Wohlfeiler et al, 2019), and in other plants such as Arabidopsis (Michaels & Amasino, 2000), sugar beet (Abe et al, 1997), celery (Quiros et al, 1987), brassicas (Pelofske & Baggett, 1979;Baggett & Kean, 1989), and lettuce (Whitaker, 1944). Our study also agrees with Solberg and Yndgaard (2015), that the diversity within accessions for flowering habit is not well captured by the GRIN-global classification the genebanks' information system, where accessions are categorized as biennial, annual, or mixture.…”

Section: Discussionsupporting

confidence: 91%

“…Few global cultivated carrot germplasm collections have been evaluated for flowering habit or bolting tendency. High broad sense heritability was estimated for bolting tendency among 48 open-pollinated carrot varieties of European and Asiatic origin, studied in India ( Manikanta et al., 2018 ), suggesting genetic potential for improvement. In an evaluation of a carrot germplasm collection (101 accessions) in China, purple rooted accessions demonstrated 48.4% premature bolting tendency, compared with 2.7% - 7% in orange rooted accessions ( Bao et al., 2010 ).…”

Section: Introductionmentioning

confidence: 99%

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Advancing utilization of diverse global carrot (Daucus carota L.) germplasm with flowering habit trait ontology

Loarca,

Liou,

Dawson

et al. 2024

Front. Plant Sci.

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Biennial vegetable crops are challenging to breed due to long breeding cycle times. At the same time, it is important to preserve a strong biennial growth habit, avoiding premature flowering that renders the crop unmarketable. Gene banks carry important genetic variation which may be essential to improve crop resilience, but these collections are underutilized due to lack of characterization for key traits like bolting tendency for biennial vegetable crops. Due to concerns about introducing undesirable traits such as premature flowering into elite germplasm, many accessions may not be considered for other key traits that benefit growers, leaving crops more vulnerable to pests, diseases, and abiotic stresses. In this study, we develop a method for characterizing flowering to identify accessions that are predominantly biennial, which could be incorporated into biennial breeding programs without substantially increasing the risk of annual growth habits. This should increase the use of these accessions if they are also sources of other important traits such as disease resistance. We developed the CarrotOmics flowering habit trait ontology and evaluated flowering habit in the largest (N=695), and most diverse collection of cultivated carrots studied to date. Over 80% of accessions were collected from the Eurasian supercontinent, which includes the primary and secondary centers of carrot diversity. We successfully identified untapped genetic diversity in biennial carrot germplasm (n=197 with 0% plants flowering) and predominantly-biennial germplasm (n=357 with <15% plants flowering). High broad-sense heritability for flowering habit (0.81 < H2< 0.93) indicates a strong genetic component of this trait, suggesting that these carrot accessions should be consistently biennial. Breeders can select biennial plants and eliminate annual plants from a predominantly biennial population. The establishment of the predominantly biennial subcategory nearly doubles the availability of germplasm with commercial potential and accounts for 54% of the germplasm collection we evaluated. This subcollection is a useful source of genetic diversity for breeders. This method could also be applied to other biennial vegetable genetic resources and to introduce higher levels of genetic diversity into commercial cultivars, to reduce crop genetic vulnerability. We encourage breeders and researchers of biennial crops to optimize this strategy for their particular crop.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Advancing utilization of diverse global carrot (Daucus carota L.) germplasm with flowering habit trait ontology

Loarca,

Liou,

Dawson

et al. 2024

Front. Plant Sci.

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Comparing vegetative growth patterns of cultivated (Daucus carota L. subsp. sativus) and wild carrots (Daucus carota L. subsp. carota) to eliminate genetic contamination from weed to crop

Godwin,

Pieralli,

Sofkova-Bobcheva

et al. 2024

Journal of Agriculture and Food Research

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Fitosociologia de malezas asociadas a cultivos de zanahoria en dos municipios de boyacá

Patiño¹,

Pinzón-Sandoval²

2021

Cien. Agri.

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Con la finalidad de conocer la fitosociología de las malezas asociadas a un cultivo de zanahoria (Daucus carota L.) bajo condiciones de los municipios de Ventaquemada y Jenesano-Boyacá, se seleccionó un lote por municipio destinado al cultivo de zanahoria y se realizó un trazado en forma de W cubriendo un área de 500 m2. Se calculó densidad relativa, frecuencia relativa, dominancia relativa y el índice de valor de importancia (IVI), así como los índices de diversidad Alpha y Beta para las zonas muestreadas. Se contabilizó un total de 6 familias y 11 especies, de estas el 63,64% estuvo representado por plantas anuales y 36,36% por plantas perennes. La clase Liliopsida (Monocotiledónea) fue representada por la familia Poaceae. Mientras que la clase Magnoliopsida (Dicotiledónea), fue representada por las familias: Asteraceae, Brassicaceae, Boraginaceae, Leguminosaceae, Polygonaceae siendo la ultima la que aporto el mayor número de especies. La especie R. crispus y P. nepalense fueron las que presentaron los mayores valores de índice de valor de Importancia (IVI) con 0,953 y 0,959, respectivamente. De acuerdo, con índice de diversidad de Shannon-Wiener y dominancia de Simpson las zonas evaluadas presentaron una baja diversidad de especies y una alta probabilidad especies dominantes. Los resultados encontrados pueden servir de base y herramienta a los productores de zanahoria de las zonas evaluadas, para definir los planes de manejo de las malezas asociadas y así optimizar los rendimientos en este cultivo.

show abstract

Understanding the genetic variability, heritability and association pattern for the characters related to reproductive phase of carrots (Daucus carota L.) in tropical region

Cited by 3 publications

References 8 publications

Advancing utilization of diverse global carrot (Daucus carota L.) germplasm with flowering habit trait ontology

Advancing utilization of diverse global carrot (Daucus carota L.) germplasm with flowering habit trait ontology

Comparing vegetative growth patterns of cultivated (Daucus carota L. subsp. sativus) and wild carrots (Daucus carota L. subsp. carota) to eliminate genetic contamination from weed to crop

Fitosociologia de malezas asociadas a cultivos de zanahoria en dos municipios de boyacá

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