Thursday, April 20, 2006

Grapes' Color Linked to a Gene's Inner Workings

Agricultural Research Service (ARS) scientists have made an important genetic discovery that, in addition to unlocking secrets about why grapes are different colors, may allow for more efficient breeding of color-specific grapes.

Color is perhaps the most important of grape characteristics, a critical component of table, juice and wine grapes that's also been linked to antioxidant content.

Plant geneticist Christopher Owens of ARS' new Grape Genetics Research Unit in Geneva, N.Y., and collaborators at France's National Institute of Agricultural Research in Montpellier found that much of the color variety in modern grape cultivars can be traced to variations in a gene recently found to be a causative factor in white grapes' lack of color.

The variations in this gene, which is called VvmybA1, are caused, in part, by movement of Gret1, a genetic mutation within it, according to Owens.He explained that Gret1 is a type of element that's also known as a type of "jumping gene" because it's a piece of DNA that moves around within a genome.

Owens found that Gret1's movements slightly alter the surrounding DNA. These alterations create additional variations in VvmybA1, which in turn influence the grape's fruit color.The finding is a potential milestone in grape research and production that may one day lead to breeding for color-specific grapes as well as for grapes that can enhance the stability of wines and juice, according to Owens.

It may also spur better understanding of relationships between fruit color and health-imparting compounds, as well as the effects of environment and management practices on grape color and quality.

The research may even lead to the development of grapes with novel colors.Owens\' work expanded on independent 2004 research in Japan that identified Gret1 and showed that its interaction with VvmybA1, which is found in all Vitis vinifera grapes, causes white grapes\' color.


************************************************************************************



AGRI-INFO/APRIL 20, 2006



TITLE: GRAPE’S COLOR LINKED TO A GENE’S INNER WORKINGS


ALAM BA NINYO NA NATUKLASAN NG MGA AGRI-EXPERT ANG GENES NG GRAPES NA SIYANG DAHILAN KUNG BAKIT MERONG MAGKAKAIBANG KULAY ANG NATURANG URI NG PRUTAS?

ANG BAGONG NATUKLASANG ITO AY MAKATUTULONG NG MALAKI SA MGA EKSPERTO PARA MAGING MAS EPISYENTE PA ANG BREEDING NG KURSUNADANG KULAY NG GRAPES.

AYON KAY PLANT GENETICIST CHRISTOPHER OWENS NG ARS NEW GRAPE GENETICS RESEARCH UNIT AT SA TULONG DIN NG MGA EKSPERTO NG FRANCE NATIONAL INSTITUTE OF AGRICULTURAL RESEARCH, ANG COLOR VARIETY NG IBAT-IBANG URI NG GRAPE AY SANHI NG MAGKAKAIBA RING GENES NA TAGLAY NG MGA ITO.

INIHAYAG PA NI OWENS, NA ANG VARIATIONS NG GENE VvmybA1 AY SANHI NG PAGGALAW NG GRET 1, ISANG GENETIC MUTATION SA LOOB NITO.

IPINALIWANAG PA NI OWENS NA ANG GRET 1 AY ISANG URI NG ELEMENT NA KILALA RIN BILANG “JUMPING GENE” DAHIL ISA ITONG DNA NA PAIKOT IKOT SA LOOB NG GENOME NA NAKAPAGPAPABAGO SA NAKAPALIGID NA DNA NA NAKAKADAGDAG SA IBAT-IBANG URI NG VVMYBA1 NA MALAKI ANG IMPLUWENSIYA SA KULAY NG BUNGA NG GRAPES.

0 Comments:

Post a Comment

<< Home