The Study On Two Special Fruit Colour Tomato Germ Plasm Resources

Tomato is an important vegetable crop whose germ plasm resources' research is thecenter of breeding work. StUdying the various germ plasm resources in a though way isthe base of the breeding work' success. Th i s test choose two spec ia1 tomato germp1asm: one is a co1orfu1 tomato, the otber is a white mutant. In order toprovi de some theory bases for breeding some specia1 tomato varieties. Thetest aims at the abnormal tomato fruit co1or phenomenon and study it. Theresults are as fo11ows tl. The co1orfu1 tomato l fruit co1()r character is qua1 itati ve geneticscontroI 1ed by one gene and the re1ative fruit co1or character between thecolorfu1 tomato and the variety havinJg unanimous fruit co1or is a1so thequa1 itative genet ics controi 1ed by one gene. The white mutant' frui t colorcharacter is recessive character cont.ro11ed by one gene.2. The white mutant ) tota1 chl oroDhy11' ch1orophy 1 I a. ch1oroDhy11 b's contents are short than other varie1.ies and the co1orfu1 tomato have nodifference from other vaTie1 ies. The v/hite mutant's fruj t can become redand have some carotenoid and 1ycopene accumulat ion in the end. Thus we canDrovide a method checking the fruits' piguent contents Quick1y andconvenient1y for the breeding work.3. Tomato fruits's total ch1oropj3yl 1' ch1orophy11 a. ch1orophyl1 b.carotenoid and the frui t surfacf3 co1or have positive re1ativere1ationship, so we can estimate rough1y the fruit piguent ) s contentsthrough checking the fruit surface Co1or.4. The white mutant's frui t fresh =e11 s arrange c1ose1y. The 1eucoplastand ch1orop1ast in the ce11s appear at the same time at mature green andturn co1or stage, which may be one 1feason of abnorma1 fruit co1or. Thecolorfu1 tomato fruit cel1 ) s plasids in the different sect ion having stripor not deve1op in different time, which may be the direct reason for theabnorma1 fruit co1or.5. Two tomato germ plasms' frUitS have the charater being aPt to saving them,butthey are the varieties not resisting disease.Postgraduate : Meng fanjuan Major: OlericultureSupervisor: Prof Li jingfu and Prof Wang fu...