Preliminary studies toward genetic improvement of annatto (Bixa orellana L.)

Rivera‐Madrid, Renata; Medrano, Rosa Maria Escobedo Gracia; Balam-Galera, Erick; Vera‐Ku, Marina; Harries, Huges

doi:10.1016/j.scienta.2006.03.011

Cited by 55 publications

(49 citation statements)

References 20 publications

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“…These abnormalities do not considerably affect the success of sexual reproduction in annatto. The high index of pollen viability observed here (98.1%) agrees with the 85% viability reported by Rivera-Madrid et al (2006) and the 95% reported by Joseph et al (2012), and explains the success of open pollination that produced one fruit for every two buds in the field.…”

Section: Biology Of Reproductionsupporting

confidence: 90%

“…Bixa orellana L. is a perennial tree native to the Neotropics (Rivera-Madrid et al 2006), also known as annatto or achiote in Mexico and urucum in Brazil. Bixa is the only genus of Bixaceae and includes six species (Carvalho et al 2005a), with B. orellana being the most important, used in the food industry as a natural red dye constituting of bixin and norbixin carotenoids found in the seed coat (Scotter et al 1998).…”

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confidence: 99%

“…Bixa is the only genus of Bixaceae and includes six species (Carvalho et al 2005a), with B. orellana being the most important, used in the food industry as a natural red dye constituting of bixin and norbixin carotenoids found in the seed coat (Scotter et al 1998). Mainly propagated by seeds (Rivera-Madrid et al 2006), this culture has an estimated world consumption of 14,500 tons of seeds per year (Parimalan et al 2008). Besides the food-industrial use, studies have pointed out some medicinal properties of its natural pigment such as antigenotoxic and pro-vitamin A like activity (Kovary et al 2005, Karchuli andGanesh 2009).…”

mentioning

confidence: 99%

“…There are few papers regarding B. orellana and some of them attempted to analyze the seed development and germination (Amaral et al 2000). Others looked for genetic improvement of the species (Carvalho et al 2005a, 2005b, Rivera-Madrid et al 2006. Carvalho et al (2005a), based on Compton et al (1996), aimed to produce polyploids of B. orellana for breeding programs.…”

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confidence: 99%

“…Carvalho et al (2005a), based on Compton et al (1996), aimed to produce polyploids of B. orellana for breeding programs. Rivera-Madrid et al (2006) presented a methodology for artificial pollination in B. orellana and some data of floral biology. Due to its economic potential, the present study aims to characterize the reproductive biology and cytogenetics of B. orellana.…”

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confidence: 99%

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Cytogenetics and Reproductive Biology of <i>Bixa orellana</i> L. (Bixaceae)

Lombello

Pinto-Maglio

2014

CYTOLOGIA

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Summary Cytogenetic and reproductive assays were carried out on a population of annatto (Bixa orellana) of Southeastern Brazil. The reproductive data indicate that B. orellana is self-compatible but preferentially alogamous and entomophylous. No apomictic fruits were obtained from emasculated flowers. Fruits formed exclusively by self-pollination were smaller and had fewer seeds than those obtained by open pollination, highlighting the importance of pollination for annatto seed production. The meiotic process was analyzed and some abnormalities observed resulted in only some sterile pollen (1.9%) with no significant reduction of fertility. The cytogenetic studies showed the haploid chromosome number n=7 and the diploid number 2n=14, with a remarkable bimodal karyotype. FISH with 45S rDNA and 5S rDNA probes showed that these loci do not occur in synteny. Both probes hybridized in the proximal regions of the short arm of pair 1 (45S) and pairs 4 and 6 (5S). One pair of 5S rDNA sites presented larger signals in FISH than the other pair. These karyological features suggest that fusion of chromosomes and amplification of DNA segments played an important role in karyotype evolution of B. orellana.

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Section: Biology Of Reproductionsupporting

confidence: 90%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Cytogenetics and Reproductive Biology of <i>Bixa orellana</i> L. (Bixaceae)

Lombello

Pinto-Maglio

2014

CYTOLOGIA

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Annatto: Botany and Horticulture

Leal

Clavijo

2011

Horticultural Reviews

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Specialized cockroach pollination in the rare and endangered plant Vincetoxicum hainanense in China

Xiong

Ollerton

Liede‐Schumann

et al. 2020

American J of Botany

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Species of Apocynaceae are pollinated by a diverse assemblage of animals. Here we report the first record of specialized cockroach pollination in the family, involving an endangered climbing vine species, Vincetoxicum hainanense in China. Experiments were designed to provide direct proof of cockroach pollination and compare the effectiveness of other flower visitors. METHODS: We investigated the reproductive biology, pollination ecology, pollinaria removal, pollinia insertion, and fruit set following single visits by the most common insects. In addition, we reviewed reports of cockroaches as pollinators of other plants and analyzed the known pollination systems in Vincetoxicum in a phylogenetic context. RESULTS: The small, pale green flowers of V. hainanense opened during the night. The flowers were not autogamous, but were self-compatible. Flower visitors included beetles, flies, ants and bush crickets, but the most effective pollinator was the cockroach Blattella bisignata, the only visitor that carried pollen between plants. Less frequent and effective pollinators are ants and Carabidae. Plants in this genus are predominantly pollinated by flies, moths and wasps. CONCLUSIONS: Globally, only 11 plant species are known to be cockroach-pollinated. Because their range of floral features encompass similarities and differences, defining a "cockroach pollination syndrome" is difficult. One commonality is that flowers are often visited by insects other than cockroaches, such as beetles, that vary in their significance as pollinators. Cockroach pollination is undoubtedly more widespread than previously thought and requires further attention.

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Preliminary studies toward genetic improvement of annatto (Bixa orellana L.)

Cited by 55 publications

References 20 publications

Cytogenetics and Reproductive Biology of <i>Bixa orellana</i> L. (Bixaceae)

Cytogenetics and Reproductive Biology of <i>Bixa orellana</i> L. (Bixaceae)

Annatto: Botany and Horticulture

Specialized cockroach pollination in the rare and endangered plant Vincetoxicum hainanense in China

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