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  • 1
    Electronic Resource
    Electronic Resource
    A quasi-steady state integral model for border irrigation (1986)
    Springer
    Irrigation science 7 (1986), S. 113-141 
    Details
    ISSN: 1432-1319
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A quasi-steady state integral (QSSI) model was developed for irrigation on freely draining borders. A semi-analytical method was used for solving the governing equations. The model results compared favorably with experimental data from 13 experimental borders for advance and from 4 experimental borders for recession. The absolute average percent deviation (APD) between calculated and observed advance times varied between 13.1 and 26.6 for 4 data sets and between 9.2 and 18.8 for 9 data sets. The APD for recession times varied between 1.7 and 5.7 for 4 data sets. The calculated advance times were smaller than observed values for these borders. For constant infiltration parameters, the border bed roughness was found to be the single most important parameter affecting model results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00259428
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  • 2
    Electronic Resource
    Electronic Resource
    Quantitative studies on the mating system of opium poppy (Papaver somniferum L.) (1992)
    Springer
    Theoretical and applied genetics 84 (1992), S. 299-302 
    Details
    ISSN: 1432-2242
    Keywords: Papaver somniferum ; Outcrossing rate ; Selfing rate ; Mating system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Nearly 400 individuals at two locations and over a number of years were crossed and subsequently scored for selfing versus outcrossing in eight monohybrid populations of opium poppy (Papaver somniferum). Two different marker loci, petal colour (R/r) and capsule size (B/b) were used to determine the male gametes that had effected fertilizations in F2 recessives (rr and bb). The estimates of the outcrossing parameter α were found to vary with year, location and for the marker locus used (α range: 0.0988–0.3704). Study of two dihybrid crosses involving the two loci simultaneously, further confirmed that outcrossing at the R/r locus was significantly greater than that at the B/b locus. The nature of the outcrossing was, in general, nonrandom. Selfmg predominated in this species; however, there was a high frequency of natural outcrossing for generating variations in P. somniferum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229486
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  • 3
    Electronic Resource
    Electronic Resource
    Potential of gamma radiation enhancing the biosynthesis of tropane alkaloids in black henbane (Hyoscyamus niger L.) (1989)
    Springer
    Euphytica 40 (1989), S. 253-258 
    Details
    ISSN: 1573-5060
    Keywords: Hyoscyamus niger ; black henbane ; mutation breeding ; genetic improvement ; tropane alkaloids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A productive yellow flowered mutant with high tropane alkaloid content was isolated in the M2 generation of gamma irradiated (Co60 at 40 kr) progenies ofHyoscyamus niger. Mutant progenies, on an average, were capable of synthetising more than twice crude alkaloid (0.147% to 0.221%) in M3 through M6 generations compared to the parental control (0.065 to 0.106%). In pilot scale trial (M7), two elite lines, Y-15 and Y-17 were found to contain 0.390% and 0.318% crude drug in contrast to 0.211% in an improved inbred used as control. However, owing to conducive plant morphology, Y-17 registered high yield of dry biomass, hence gave more than double yield of crude drug than the improved control (inbred) (23 kg/ha against 11 kg/ha). Also being superior in hyoscyamine and hyoscine yields, it was redesignated as var.Aela, and released for commercial cultivation in India, thus signifying the efficiency of radiation breeding for crop improvement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024520
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