GREEN SEED COAT COLOUR RETENTION IN LENTIL - University ...

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greater than 40 percent moisture in the seed. Bovey et al. (1999) reported that the effect of glufosinate as a desiccant in grain sorghum was similar to the effect of diquat, with only minor effects on quality and yield. There is no literature available indicating yield or quality loss when swathing or desiccation of lentil occurs either earlier or later than currently considered acceptable timing. 2.9 Heritability Heritability is a measurement of how much that the progeny of a cross is explained by the genotype. There are two types of heritability: broad sense which is a measurement for heterozygous individuals and narrow sense which is used when measuring homozygous individuals. For completely homozygous individuals broad sense heritability is equal to narrow sense heritability. The calculation of heritability has been well established in self pollinated crops like lentil. A cross is made between two individuals that are from the extremes for the trait to be evaluated. The resulting progeny are taken to near homozygousity through single seed descent, where each plant has one seed harvested and planted which becomes the following generation. When the seed is at a desired level of homozygosity the examination of heritability can occur. To study heritability five types of variation must be evaluated. They are genetic variation, variation due to locations, years, interactions, and replications. Proper experimental set up will allow these to be evaluated. At least two locations, replications, and years must be used to evaluate the trait. More should be used until available resources are exhausted. The more locations, years, and replications used the better the estimate of genetic variation 26
and the higher the heritability estimate (Falconer and MacKay, 1996). Heritability estimates are grouped into three categories. If the heritability is larger than 0.75 the heritability is considered to be high. If the heritability is 0.5 to 0.75 it is considered to be moderate. If it is below 0.5 heritability is low. 27
Page 1 and 2: GREEN SEED COAT COLOUR RETENTION IN
Page 3 and 4: ABSTRACT Poor seed coat colour desi
Page 5 and 6: ACKNOWLEDGEMENTS The author would l
Page 7 and 8: 7.2 Maturity and Index Score ......
Page 9 and 10: Table 4.13 Acurum index score, tota
Page 11 and 12: 1.0 INTRODUCTION Green lentil has b
Page 13 and 14: example canola. In wheat it is used
Page 15 and 16: carbohydrate, and micronutrient req
Page 17 and 18: It would also be useful for lentil
Page 19 and 20: process and categorize the data int
Page 21 and 22: Table 2.2 Descriptions of the colou
Page 23 and 24: 2.4 Perceived seed colour in green
Page 25 and 26: 2.6 Cotyledon chlorophyll degradati
Page 27 and 28: temperatures. The more enzyme activ
Page 29 and 30: the seed produces bleached seeds wi
Page 31 and 32: correlation between seed weight in
Page 33 and 34: used widely as a desiccant is that
Page 35: prevailing winds. A problem that oc
Page 39 and 40: 4.1 Heritability Study Objectives 4
Page 41 and 42: Plant material for the study includ
Page 43 and 44: Table 4.4 Herbicide and desiccant a
Page 45 and 46: was a=0.05. The heritability was ca
Page 47 and 48: during the time taken to remove the
Page 49 and 50: normally distributed data. In 2006
Page 51 and 52: location and year explained a large
Page 53 and 54: The tester set that was included in
Page 55 and 56: etween field and phytotron index sc
Page 57 and 58: Table 4.10 shows the mean index sco
Page 59 and 60: Sutherland in 2005 produced the mos
Page 61 and 62: Table 4.12 Effect of changing the n
Page 63 and 64: wrinkling as sound seeds. It is dif
Page 65 and 66: negative relationship. The regressi
Page 67 and 68: Chlorophyll b content (mg/g) 120 10
Page 69 and 70: 1994). It is important to note howe
Page 71 and 72: estimates of which lines produced t
Page 73 and 74: in both years to produce two differ
Page 75 and 76: At the time of desiccation or swath
Page 77 and 78: a significant genotype x environmen
Page 79 and 80: Table 5.7 Mean green index score of
Page 81 and 82: All three groups for both desiccati
Page 83 and 84: index score was not equal for each
Page 85 and 86: Alternatively, the samples had less
Page 87 and 88:
sclerotinia white mold (Sclerotinia
Page 89 and 90:
6.0 GENERAL DISCUSSION Knowing whic
Page 91 and 92:
The Acurum ® machine has some pote
Page 93 and 94:
process. If small gains in desirabi
Page 95 and 96:
for more efficient selection sooner
Page 97 and 98:
8.0 REFERENCES AAFC. 2007. Agricult
Page 99 and 100:
Guiamét, J.J., E. Schwartz, E. Pic
Page 101 and 102:
Shearer, S.A., G.M. Turner, M. Coll
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