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  • 1
    Electronic Resource
    Electronic Resource
    Inheritance of Karnal bunt-free trait in bread wheat (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 123 (2004), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A Karnal bunt (KB)-free wheat stock (‘KBRL22’) obtained from a cross of two resistant lines (‘HD29’ and ‘W485’) was used as a donor to introgress the KB-free trait into ‘PBW343’(an ‘Attila’ sib), the most widely grown wheat cultivar in India. The number of KB-free and KB-affected plants in BC 1, BC2, BC3 and BC4 as well the F2 was recorded after artificial inoculations. The segregation pattern in these generations clearly indicated two independently segregating, dominant genes which jointly confer the KB-free attribute. The importance of the KB-free line generated in this experiment is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.0179-9541.2003.00923.x
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  • 2
    Electronic Resource
    Electronic Resource
    A simple technique for the identification of embryo-carrying seeds from wheat × maize crosses prior to dissection (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 117 (1998), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Embryo rescue is an important step in the wheat x maize system of induced haploidy in wheat. On average, only one-third of the seeds carry embryos, but they all have to be dissected because no morphological distinction is available to distinguish between seeds with and without embryos. We here report a simple technique in which immature seeds from wheat × maize crosses are placed on a transparent surface and illuminated from above. The free-floating embryo, settled at the bottom of the seed, can be seen from below or in an image reflected on a plane mirror. Using this technique 97.8% of the embryo-containing seeds could be detected prior to dissection. The technique will be useful in reducing the time and labour involved in embryo culture, thereby scaling up haploid production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1998.tb01479.x
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  • 3
    Electronic Resource
    Electronic Resource
    Inheritance of heading date, plant height, ear length and spikelets per spike in an intervarietal cross of wheat (1981)
    Springer
    Theoretical and applied genetics 60 (1981), S. 167-171 
    Details
    ISSN: 1432-2242
    Keywords: Analysis of generations ; Spring wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A study to obtain information on early segregating generations of an intervarietal cross ‘WG 357’ X ‘Tobari 66’ in spring wheat on the genetics of days to heading, plant height, ear length and spikelets per spike was conducted. ‘WG 357’ has amber, hard and lustrous grains and is a well adapted high yielding variety of North India whereas ‘Tobari 66’ is red grained introduction from CIMMYT. The parental F1, F2, B1, B2, biparentals, F3 (parents of biparentals), F3 bulk and F4 bulk generations were studied in order to provide analysis of generations means (Mather 1949; Hayman 1958) and variance component analysis (Kearsay 1965; Perkins and Jinks 1970). There were highly significant differences among the generations for all the characters studied. There were significant differences among the F3 lines as well as among the biparental progenies. Only in case of ear length was the contrast between the two also significant. The mean value of most of the generations arising from the cross fell between the parental range. The three-parameter model failed to account for the variation in generation means in the case of days to heading. This character was concluded to be influenced by linkage and higher order interactions. For the other characters the three parameter model was adequate. For all characters, additive gene effects were most important as compared to dominance gene effects. The analysis of gene action as provided by the generation variance indicated that additive variance was much more pronounced as compared to dominance variance. The heritability was high for days to heading (71 per cent for narrow sense and 80 per cent in broad sense) and plant height (62 and 93 per cent in narrow and broad sense respectively. The implications of the results in breeding programmes have been discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00264523
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  • 4
    Electronic Resource
    Electronic Resource
    Epistatic, additive and dominance variation in a triple test cross of bread wheat (Triticum aestivum L.) (1982)
    Springer
    Theoretical and applied genetics 62 (1982), S. 49-52 
    Details
    ISSN: 1432-2242
    Keywords: Epistasis ; Triple test cross ; Triticum aestivum L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Triple test cross progenies resulting from the crossing of three testers (‘Kloka’, ‘UP 368’ and an f1 intermediate between them) and 24 varieties of bread wheat have been studied for plant height (cm), peduncle length (cm), ear length (cm), number of spikelets per spike and harvest index (ratio between economic and total yield). Epistasis was not significant for any of the characters studied. The testers were inadequate for plant height and for peduncle length although the testers varied considerably for these traits. Additive variance played a significant role in the inheritance of all the characters except number of spikelets per spike. The dominance variance was important for plant height, ear length and harvest index. The degree of dominance was in the over-dominance range for plant height. Complete dominance was operative for ear length, number of spikelets per spike and harvest index whereas for peduncle length only partial dominance was observed. The possibility of the isolation of the recombinants with high harvest index has been stressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276282
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  • 5
    Electronic Resource
    Electronic Resource
    Stability analysis over seasons and locations of multilines of wheat (Triticum aestivum L.) (1984)
    Springer
    Euphytica 33 (1984), S. 489-495 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; wheat ; multilines ; recurrent parents ; stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Three multilines each of Kalyansona and PV 18 varieties of wheat were compared for their stability of yield and agronomic characters and disease resistance against the respective recurrent parents. The experiments were conducted for four years at nine locations. The multilines had more tillers and bolder seeds than the recurrent parents. There were, however, no differences for plant height, ear length and number of spikelets per spike. The genotypes x years x locations interaction was much more important than genotypes x years or genotypes x locations interaction as well as the main effects for genotypes. It is suggested that the number of test locations should be increased while decreasing the number of years. The stability parameters indicated that the multilines had a higher mean yield in the case of Kalyansona multilines whereas the yield of multilines of PV 18 was not significantly inferior to that of the recurrent parent. The regression coefficients were very close to unity except for KSML 3 (b=1.132). The deviations from regression were much larger for the multilines than for the recurrent parents. For rust resistance the multilines were superior over the varieties Kalyansona and PV 18.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021149
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  • 6
    Electronic Resource
    Electronic Resource
    Studies on multilines in wheat (Triticum aestivum L.).12. Breeding of a multiline variety by convergence of breeding lines (1980)
    Springer
    Euphytica 29 (1980), S. 125-128 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; bread wheat multiline ; limited backcross
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The variation among the component lines of the KSML 3 (a multiline based on cultivar Kalyansona, spring bread wheat) was studied for agronomic characteristics. For days to earing and plant height the variation was small. This helped in imparting uniformity to the multiline. The lines had an improved tillering ability and had larger seeds. This partially explained the increased yield potential of the multiline as compared with Kalyansona. All the lines were susceptible only to one or two races of the yellow and brown rust. In no case any race was virulent against all the lines. In the field all the lines were resistant to both rusts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00037257
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  • 7
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    Maize Genotypes Show Striking Differences for Induction and Regeneration of Haploid Wheat Embryos in the Wheat × Maize System (1999)
    Wiley
    Details
    Publication Date: 1999-11-01
    Print ISSN: 0011-183X
    Electronic ISSN: 1435-0653
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Wiley
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