Selective pressures to eggplant (Solanum melongena Linn.)germplasm: implications on seed market and gene flow
2011
Soniega, J.A. | Odones, A. | Maravillas, V.O., Bicol Univ., Guinobatan, Albay 4503 (Philippines). Dept. of Agricultural Sciences
Eggplant is cultivated in Albay Province [Philippines] as monocrop, part of multicrop or intercrop under coconut. As one of the high value crops, it is cultivated across gradients of soil textures and topography. Production varies from backyard to business scale. Farmers' options for high yielding and stress tolerant varieties widen as planting materials of newly developed varieties flourish. This influx brings competition among the genotypes to be dessiminated in time and space. Germplasm which can overcome selective pressures in the area perpetuate and become ecologically adapted. Those that cannot adapt in the environment perish and eggplant germplasm is not an exception. The onslaught of super typhoon Reming (Durian) on November 2006 decimated the arable lands of the province and might have resulted to: (1) fragmented populations of plant pathogens, pathogens and pollinators which aid in successive geneflow; and (2) altered movement of germplasm due to physical barriers. These factors become selective pressures for genotypes (varieties) in synergy with changing climate. There is dearth of literature that assess varietal performance and preference of farmers for eggplant in Albay. This paper seeks to complement this gap as it present findings based on survey and ocular inspection done during the 2008-2009 cropping season.
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