Reproductive characterization and preliminary studies on controlled breeding of Annatto (Bixa orellana L.)

Joseph, Nisha; Siril, E. A.; Nair, G. M.

doi:10.1007/s00606-011-0541-0

Cited by 14 publications

(13 citation statements)

References 25 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%

“…There is one report of protandry for a Colombian population of B. orellana (Gómez 1980) and one of synchrony between pollen and stigma maturation in a Brazilian population (Almeida and Pinheiro 1992). Joseph et al (2012) presented studies for some reproductive characters of an Indian population of B. orellana, showing its pollen morphology and viability. There are no data for selfcompatibility or apomictic fruit for B. orellana or for the other Bixa species.…”

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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%

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confidence: 99%

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

Lombello

Pinto-Maglio

2014

CYTOLOGIA

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“…Because AHBs consume pollen from annatto, this may reduce the amount of pollen grains available to other more efficient pollinators, resulting in pollen depletion (Hargreaves et al ., ). Although there is a notably high pollen/ovule ratio in annatto (Joseph et al ., ), the effect of pollen limitation caused by AHBs on this and other buzz‐pollinated Neotropical crops is worthy of evaluation.…”

Section: Discussionmentioning

confidence: 99%

Pollination services of Africanized honey bees and nativeMelipona beecheiito buzz-pollinated annatto (Bixa orellanaL.) in the neotropics

Caro

Moo-Valle

Alfaro³

et al. 2016

Agr Forest Entomol

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1 Africanized honey bees (AHBs) are the predominant flower visitors of many plants in the neotropics, although little evidence is available on their efficiency as pollinators on native crops. 2 Annatto (Bixa orellana) is a buzz-pollinated neotropical tree. We compared the pollination service provided by AHBs and native Melipona beecheii (Mb) to annatto in the Yucatan. As a result of the different abilities of both species to sonicate, a prediction of the present study is that AHBs on individual visits would result in less efficient pollinators on this crop. 3 A higher frequency of AHBs on flowers (73.8%) compared with Mb (21.3%) was found. However, AHBs deposited significantly less pollen on the stigma and produced less fruits, with fewer seeds and weight, than Mb. A higher pollination index efficiency was obtained for Mb (0.9) compared with AHBs (0.6). 4 AHBs did not sonicate annatto and gleaned the pollen released after Mb visits, which suggests that they act as commensals of the latter. 5 By acting as commensals, AHBs, despite their high abundance, appear to marginally contribute to the pollination of annatto. Studies conducted under scenarios with a differential abundance of AHBs and efficient sonicating species are necessary to test this hypothesis on annatto and other buzz-pollinated plants in the neotropics.

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“…Both morphological and/or genetical characteristics were considered using different laboratory methods and reported that peculiar morphological architectures of leaf stomata in Dianthus at different concentrations of three potent chemical mutagens were analysed on the basis of their Scanning Electron Microscopy (SEM) images which is more informative than the classical approach. Joseph et al (2012) presented studies for some reproductive characters of an Indian population of B. orellana, showing its pollen morphology and viability. There is no data for self-compatibility or apomictic fruit for annatto or for other Bixa species.…”

Section: Introductionmentioning

confidence: 99%

Floral, reproductive biology and morphological variation in annatto (Bixa orellana L.)

2020

EJPB

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The present study aimed at evaluating the genetic variability of different germplasms and comparative effectiveness of morphological descriptors, floral and reproductive biology of three CPTs of annatto viz.,Tamil Nadu (green fruited), Kerala (red fruited), Karnataka (dark red fruited) at department of Forest Biology and Tree improvement, Forest College and Research Institute, Mettupalayam during 2017-19. A record on sequence of flowering ascends along the latitudes. The sequence of flowering is top to bottom (basipetal) that is the development, maturation or opening from the apex towards the base in the sequence. It commenced from the southern side to the south eastern side. The colour of the flower is whitish pink in Tamil Nadu, moderate pink in Karnataka and dark pink in Kerala and this floral colour polymorphism suggests that pollinators (mainly bumble bees and ants) are the primary selective agents which influence flower colour. The stain I-KI showed 95 % pollen viability and it is found that the viability of the pollen grains decreased after four hours from pollen dehiscence and tricolporate pollen was observed in annatto. The observation on fruit set indicated that bixa plant can have both self-and cross-pollination. Fruit maturity takes place 80-95 days counting from the day of pollination to fruit dehiscence. The shape of the fruit resembles rounded oblong pyriform. Maximum seed production was recorded in the red fruited (collected from Karnataka) (113.12 g) plant followed by the dark red fruited plant (Kerala) and the green fruited variant (TN).

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Reproductive characterization and preliminary studies on controlled breeding of Annatto (Bixa orellana L.)

Cited by 14 publications

References 25 publications

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

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

Pollination services of Africanized honey bees and nativeMelipona beecheiito buzz-pollinated annatto (Bixa orellanaL.) in the neotropics

Floral, reproductive biology and morphological variation in annatto (Bixa orellana L.)

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