tailieunhanh - Comparative genetics of crop plant domestication and evolution
This paper reviews what is known about the genetic control of domestication traits with an emphasis on comparative analyses that examine this control in two or more crop species. Such analyses indicate that although most domestication traits are quantitatively controlled, the dramatic morphological changes that accompanied domestication may be due to relatively few genes. | Turk J Agric For 27 (2003) 59-69 © TÜB‹TAK Review Comparative Genetics of Crop Plant Domestication and Evolution Anne FRARY, Sami DO⁄ANLAR Department of Biology, ‹zmir Institute of Technology, Gülbahçe Campus, 35437, Urla, ‹zmir - TURKEY Received: Abstract: Domesticated species differ from their wild ancestors and relatives for a set of traits that is known as the domestication syndrome. The most important syndrome traits include growth habit, flowering time, seed dispersal, gigantism and morphological diversity. This paper reviews what is known about the genetic control of domestication traits with an emphasis on comparative analyses that examine this control in two or more crop species. Such analyses indicate that although most domestication traits are quantitatively controlled, the dramatic morphological changes that accompanied domestication may be due to relatively few genes. These studies also show that domestication genes have been functionally conserved over thousands of years and have similar, although not identical, effects in various species. Key Words: domestication syndrome, growth habit, flowering time, seed dispersal, gigantism Kültür Bitkilerinin Evcillefltirilmesi ve Evriminin Karfl›laflt›r›lmal› Geneti¤i Özet: Evcillefltirme ifllemine tabi tutulmufl türler yabani atalar›ndan ve akrabalar›ndan evcillefltirme sindromu olarakta bilinen bir çok karakter bak›m›ndan farkl›l›k gösterirler. En önemli evcillefltirme sindromu karakterleri aras›nda büyüme flekli, çiçeklenme zaman›, tohum da¤›t›m›, devlik ve morfolojik çeflitlilik yer almaktad›r. Bu gözden geçirme çal›flmas›, evcillefltirme karakterlerinin genetik esaslar› hakk›nda bilinenleri iki yada daha çok bitki türündeki kontrolü inceleyen k›yaslamal› analizleri göz önünde tutarak özetlemektedir. Bu analizler ço¤u evcillefltirme karakterlerinin kantitatif olarak kontrol edilmelerine ra¤men, evcillefltirme sonras› ortaya ç›kan dramatik morfolojik de¤iflikliklerin k›smen bir kaç gen’den .
đang nạp các trang xem trước
