Citrullus lanatus (Thunb.) Matsum. & Nakai - Cucurbit Breeding ...

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INHERITANCE OF QUALITATIVE FRUIT TRAITS IN WATERMELON Figure 1. Intermittent stripes in 'Navajo Sweet' (fruit on the left) and continuous stripes in 'Crimson Sweet' (fruit on the right). .............................................................................................56 Figure 2. In order to keep families, generations, and plants separate for data collection, each plant was manually trained each week into a spiral shape by turning all the vines in a clockwise circle around the crown until about 70% of the plants in the field set fruit. ............57 Figure 3. Moons and stars induced on watermelon by the Sp gene may be recovered on striped fruit, overlapping both dark green stripes and light green background......................................58 Figure 4. Stars (small yellow spots) close to the border of a moon (large yellow spot) tend to coalesce with the moon in 'Moon and Stars' and in watermelon progenies segregating for the Sp gene. ..............................................................................................................................59 Figure 5. Examples of unexpected flesh colors in the progenies of the crosses 'Golden Honey' × 'Cream of Saskatchewan' and 'Charleston Gray' × 'Cream of Saskatchewan'. Arrows indicate areas of differential coloration of the flesh....................................................................60 HERITABILITY AND GENETIC VARIANCE ESTIMATES FOR FRUIT WEIGHT IN WATERMELON Figure 1. Each of the three cultivars with giant fruit 'Carolina Cross #183' (1), 'Cobbs Gem' (2), and 'Weeks NC Giant' (3) was crossed with the three cultivars with small fruit 'Petite Sweet' (4), 'Minilee' (5), and 'NH Midget' (6) to estimate the variance components and heritability of fruit-weight in watermelon....................................................................................98 Figure 2. In order to keep families, generations, and plants separate for data collection, each plant was manually trained each week into a spiral shape by turning all the vines in a clockwise circle around the crown until about 70% of the plants in the field set fruit. ............99 xiii
HERITABILITY AND GENETIC VARIANCE ESTIMATES FOR RESISTANCE TO GUMMY STEM BLIGHT IN WATERMELON Figure 1. Frequency distribution plots of F 2 data for the four watermelon families (resistant PI accessions by susceptible cultivars of Citrullus lanatus var. lanatus and citroides) screened for resistance to gummy stem blight in greenhouse and field tests in North Carolina (2002-2003). .................................................................................................................127 PRELIMINARY STUDY OF MOLECULAR MARKERS LINKED TO RESISTANCE TO GUMMY STEM BLIGHT IN WATERMELON Figure 1. Agarose gel electrophoresis of PCR products of the monomorphic SSR marker URF1 (Forward: AGC AGC ACC TTG TCT TGT AT - Reverse: CAC AGA TCC CAC TCA ATC TT from 24 random samples of DNA extracted from watermelon leaves. ....................162 Figure 2. Example of agarose gel electrophoresis of PCR products of the polymorphic RAPD marker UBC-338 (CTG TGG CGG T; 600 bp band) in the F 2 population of the cross PI 189225 × 'NH Midget' (resistant × susceptible), segregating for resistance to gummy stem blight (S = susceptible, R = resistant)...............................................................................163 Figure 3. Agarose gel electrophoresis of PCR products of the polymorphism of the RAPD marker UBC-338 (CTG TGG CGG T; 600 bp band) among inbred cultigens of watermelon resistant or susceptible to gummy stem blight...........................................................................164 xiv
Page 1 and 2: Abstract GUSMINI, GABRIELE. Inherit
Page 3 and 4: Biography Gabriele Gusmini was born
Page 5 and 6: Currently, Gabriele is planning his
Page 7 and 8: Table of Contents LIST OF TABLES...
Page 9 and 10: Germplasm and Crosses..............
Page 11 and 12: GENERAL INTRODUCTION LIST OF TABLES
Page 13: GENERAL INTRODUCTION LIST OF FIGURE
Page 17 and 18: Brief History of Watermelon Breedin
Page 19 and 20: absence of trichomes on the leaves
Page 21 and 22: The genetics of the flesh color in
Page 23 and 24: The primary nematode species attack
Page 25 and 26: 1975), but no gene has been found f
Page 27 and 28: Henderson, W.R., G.H. Scott, and T.
Page 29 and 30: Shimotsuma, M. 1963. Cytogenetical
Page 31 and 32: Table 1. Watermelon cultivars with
Page 33 and 34: Figure 2. Cultivar Allsweet, releas
Page 35 and 36: Figure 4. Watermelon seeds size: 1
Page 37 and 38: Introduction The inheritance of rin
Page 39 and 40: stripes. In his study, Shimotsuma c
Page 41 and 42: Diamond'), GG mm = mottled dark gre
Page 43 and 44: Shimotsuma, M. 1963. Cytogenetical
Page 45 and 46: Figure 2. Cultivars Japan 6 and Chi
Page 47 and 48: Figure 4. Cultivars Crimson Sweet (
Page 49 and 50: Abstract The watermelon [Citrullus
Page 51 and 52: The rind (skin) colors and patterns
Page 53 and 54: two hybrids are the original canary
Page 55 and 56: Names and symbols for new genes pro
Page 57 and 58: Salmon Yellow and Red Flesh During
Page 59 and 60: During our experiments we did not f
Page 61 and 62: Poole, C.F. and P.C. Grimball. 1945
Page 63 and 64: Table 2. Single locus goodness-of-f
Page 65 and 66:
Table 3. Single locus goodness-of-f
Page 67 and 68:
Page 69 and 70:
Table 6. Continued. z Generation To
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Figure 1. Intermittent stripes in '
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Figure 3. Moons and stars induced o
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Figure 5. Examples of unexpected fl
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Abstract High yield is a major goal
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States appears to be narrow, with m
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y using only two replications from
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value=0.0001), indicating that cult
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Levi, A., C.E. Thomas, A.P. Keinath
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Table 1. Analysis of variance (degr
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Table 2. Continued. Yield z Fruit s
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Table 2. Continued. Yield z Fruit s
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w L/D = length/diameter ratio measu
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Abstract The cultivated watermelon
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dominance, and epistatic effects we
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thumped (Maynard, 2001). Weights we
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The giant-fruited parents had a lar
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Literature Cited Brar, J.S. and K.S
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Table 1. Phenotypic variances by ge
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Table 2. Variance and heritability
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t h 2 n = narrow-sense heritability
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Table 3. Continued. Effective Facto
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Figure 1. Each of the three cultiva
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CHAPTER FIVE HERITABILITY AND GENET
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fungus that is seed-borne (Lee et a
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the technique described herein. Pyc
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9 = plant dead. Plants with a disea
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The possible gain from selection pe
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Based on our data, Norton may not h
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Gusmini, G., T.C. Wehner, and G.J.
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Sherbakoff, C.C. 1917. Some importa
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Page 133 and 134:
Table 1. Continued. z Generation To
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w Expected was the hypothesized seg
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on leaves only; 5 = some leaves dea
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on leaves only; 5 = some leaves dea
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z Data are ratings from four famili
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CHAPTER SIX PRELIMINARY STUDY OF MO
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fungus that is seed-borne (Lee et a
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approach was successful in assembli
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subculture on artificial medium bas
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We extracted DNA using an extractio
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products using the Genescan ® -500
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(DNA/Polysaccharides) and 260/280 (
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Future Research Based on our prelim
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Gusmini, G., T.L. Ellington, and T.
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Perin, C., L.S. Hagen, V. De Conto,
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Table 2. Analysis of variance for t
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029 v 1 . 3 3 . . 3 4 3 3 . . . + B
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Table 3. Continued. 071 v 1 3 . 3 4
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Table 3. Continued. 113 2 4 5 5 4 3
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Table 3. Continued. 155 2 4 5 4 . 4
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Page 175 and 176:
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Figure 1. Agarose gel electrophores
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1 5 10 15 20 25 30 35 + + + + + + +
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The genetics of rind color (or patt
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were not successful, even though se
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Breeding Methods Traits of interest
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alternative to biotechnology and te
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The solution to these problems is n
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Cucurbit Gene List Committee. 1979.
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Henderson, W.R., G.H. Scott, and T.
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Matthews, P. (ed.). 1993. The guinn
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Provvidenti, R. 1991. Inheritance o
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Souza, F.F.d., M.A.d. Queiroz, and
Page 201:
Wright, S. 1968. The genetics of qu
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