It is now considered that the coconut palm might have originated independently in the Pacific and also the Indo-Atlantic oceanic basins (Gunn et al. The coconut palm has been known to exist in most regions of the tropics from pre-historic times. The coconut industry is intimately connected with the economic and domestic life of the inhabitants of coconut-growing states. In addition to being a food crop, coconut is considered as an industrial crop. When strategically used, it can increase food production, improve nutrition, create employment opportunities, enhance equity and help to preserve the environment. Coconut products provide food, shelter and energy to farm households, and can be made into various commercial and industrial products. Almost every part of the coconut tree is used either to generate income or to meet the food requirements of rural communities (Persley 1992). The coconut palm ( Cocos nucifera L.) is considered as "the symbol of the tropics" and "the tree of heaven" in view of its position as a key plantation crop of the tropics and also its versatile contribution to humankind. Key words: Arecaceae, híbrido, pureza genética, marcadores moleculares. Esse mesmo primer foi usado também na triagem de parentais e para validar h íbridos dos cruzamentos de gigante x anão. Para sua valida ção, esse primer foi usado para triagem de coqueiros gigantes e anões de diferentes regiões geográficas. Screening no bulk de DNA de plantas gigantes e anãs com 200 primers revelaram um primer RAPD OPBA3 capaz de diferenciar claramente ambos os bulks. No presente trabalho, marcadores RAPD para o caráter gigante/anão foram identificados em coqueiros usando abordagem de bulk de DNA. A prática da seleção convencional de seedlings baseada somente em caracteres morfológicos resulta, frequentemente, em seleção de seedlings de tipos indesejáveis. Devido a essa diferença, obter progênies verdadeiras de cultivares gigantes e anões desej áveis tem sido um desafio. Key words: Arecaceae, hybridity, genetic purity, molecular markers.Ĭoqueiros são classificados em dois principais tipos: 'gigantes' and 'anões', os quais diferem principalmente em seus comportamentos de polinização cruzamento e auto-polinização, respectivamente. IIDivison of Crop Improvement, CPCRI (RS), Kayamkulam 690 533, Kerala, India IDivison of Crop Improvement, Central Plantation Crops Research Institute, Kasaragod 671124, Kerala, India Rajesh MKI, * Jerard BA I Preethi P I Regi Jacob Thomas II Anitha Karun I Esse mesmo primer foi usado também na triagem de parentais e para validar híbridos dos cruzamentos de gigante x anão.Īrecaceae híbrido pureza genética marcadores molecularesĪpplication of RAPD markers in hybrid verification in coconutĪplicação de marcadores RAPD na verificação híbrida em côco Para sua validação, esse primer foi usado para triagem de coqueiros gigantes e anões de diferentes regiões geográficas. Devido a essa diferença, obter progênies verdadeiras de cultivares gigantes e anões desejáveis tem sido um desafio. The primer was also used to screen the parents and validate hybrids of Dwarf x Tall crosses.Īrecaceae hybridity genetic purity molecular markersĬoqueiros são classificados em dois principais tipos: 'gigantes' and 'anões', os quais diferem principalmente em seus comportamentos de polinização cruzamento e auto-polinização, respectivamente. For validation, the primer was used to screen individual tall and dwarf coconut palms representing different geographic regions. Screening of tall and dwarf palm bulk DNA with 200 primers revealed a RAPD primer OPBA3 which was able to clearly differentiate both the tall and dwarf bulks. In the present investigation, RAPD markers for the tall/dwarf trait were identified in coconut using a bulked DNA approach. The conventional practice of selection of seedlings based solely on morphological traits often results in selection of out-crossed seedlings and undesirable off-types. Due to this difference, getting true-to-type progenies of desirable tall and dwarf cultivars has always been a challenge. Coconut palms are classified into two major types, viz., 'talls' and 'dwarfs', which mainly differ in their pollination behavior of cross- and self-pollination, respectively.
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