BIOL 1050 Lecture Notes - Lecture 5: Lemming, Inbreeding, Kohlrabi

• School: University of Guelph
• Department: Biology
• Course: BIOL 1050
• Professor: Dr.Eric Lyons

Document Summary

Wild vs domesticated bananas larger fruit, seedless, sweeter. Wild vs domesticated carrots: wild, woody root, white, smell of carrot, modern, crunchy root, sweet, orange. Wild vs domestic peach: wild, small fruit large seed inedible skin, sour, domestic. Botrytis large fruit small seed: edible skin, sweet. Teosinte vs modern corn teosinte = corns ancestor: small grain, hard shell, corn. Hete(cid:396)osis: (cid:862)the te(cid:374)de(cid:374)(cid:272)(cid:455) of a (cid:272)(cid:396)oss(cid:271)(cid:396)ed i(cid:374)di(cid:448)idual to sho(cid:449) (cid:395)ualities supe(cid:396)io(cid:396) to those of (cid:271)oth pa(cid:396)e(cid:374)ts(cid:863) Self-fertilization inbred lines t(cid:396)aits a(cid:396)e (cid:862)fi(cid:454)ed(cid:863) increasing homozygosity loss of genetic diversity inbreeding depression (inbred line) loss of vigour recessive traits: genetically uniform (99. 2%) F1 hybrids: crossing 2 inbred lines, maximizes heterosis (cid:894)i(cid:374)(cid:272)(cid:396)eased (cid:862)h(cid:455)(cid:271)(cid:396)id (cid:448)igou(cid:396)(cid:863)(cid:895, genetically uniform plants (more uniform plants) Impact of hybrids on corn yields in usa: h(cid:455)(cid:271)(cid:396)ids i(cid:374)t(cid:396)odu(cid:272)ed i(cid:374) (cid:1005)9(cid:1006)(cid:1004)"s. Increased stress tolerance: more reliable yield, higher planting density, combined with synthetic fertilizers increasing the plant density means there will be more yields.