The Research On Inheritance Of The Several Nutrient Content In Watermelon Fruit

This paper researches the tomato red pigment, L-melon ammonia acid, vitamin c, seedsize and anti-oxidation activity among different varieties of half-bread and backcrossing descendants through the watermelon and melon seed; discusses thegenetic law of tomato red pigment, L-melon ammonia acid and seed size; comparesanti-oxidation activity evaluation with different varieties and compares the correlationbetween selected method and its anti-oxidation. Drawing the following conclusions bysummary and analysis:1. Fruits of white stuffed varieties content very less in the lycopene, but red stuffedvarieties content more; F₁of filial generation is white mainly, just the pulp is yellowmore and the content of tomato red pigment increases a little; back crossing descendantsbetween F₁and White parents maintain low level of content, back crossingdescendants between F₂and parents of F₁and Red appear separation; analyzing twoparents, F₁and back crossing descendants between F₁,F₂and their parents, we find thattomato red pigment is quality genetic, the overlapped by two dominant genes play a low intomato red pigment, and existing on the effect of several genes in tomato red pigment, playsthe role of modification in the corresponding range.2. The difference of the content of L-melon ammonia acid is small between Red varietiesand White varieties, hybrid descendants in the change of content is continuous changes,analyzing two parents, F₁and back crossing descendants between F₁,F₂and theirparents, the heredity of L-melon ammonia acid may be affected by cultivation conditionsand local climate.3. Using three kinds of antioxidant activity evaluation system carries on the appraisaland the correlation analysis of antioxidant content in the four species of watermelon. Resultsshow that free radicals ability is P2>P1>F₁>T-2in ABTS evaluation system, free radicalsability is P2>F₁>T-2>P1in DPPH evaluation system, Reducing Power of Iron ion isP1>F₁>P2>T-2; the melon seeds are superior to watermelon variety in the ability of the totalantioxidant capacity (FRAP), hybrid descendants of the watermelon and melon seed arebetter than watermelon in the ability of the antioxidant capacity. red flesh watermelons arehigher in tomato red pigment and vitamin c than melon seed and hybrid descendants of thewatermelon and melon seed, the difference of L-melon ammonia acid is relatively small;Two kinds of antioxidant activity (ABTS and DPPH) has significant correlation with theabove two component content, but reducing Power of Iron ion has negative correlation.the results indicate that relevant antioxidant properties in different antioxidant activitydetermination method might be different, antioxidant capacity in ABTS and DPPH hascorrelation with lycopene, the performance of the antioxidant activity in FRAP is totalanti-oxidation ability of individual itself, It contains the results of multiple components, but the determination of the three components has not even negative correlation with it in thispaper.4. Parents and progeny: P1(jingyuandaban, edible seed watermelon), P2(04-12,watermelon for flesh), progeny included F₁, F₂and back cross with parents were used toresearch inheritance of seed size. The results showed that the F₁seeds were all small in sizenear P2, the F₂and F₁×P1peogeny segregated in a ratio of13:3and1:1(small:large), F₁×P2peogeny were all small. Compared the F₂, F₁×P1and F₁×P2peogeny, F₁×P1were largerthan F₂and F₂larger than F₁×P2, and the size seeds were scattered in a district in the samegroup of size seeds. These results fitted a pattern of inheritance of a single major gene withtwo alleles and a recessive inhibition gene, and the gene of small size seed was dominance.And several modifier or minor genes influence seed size.