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Production of Homomatromorphs through Pollen Treatment in Pisum sativum L. (1989)

Multani, Dilbag S. ; Virk, D. S. ; Virk, P. S. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 102 (1989), S. 0

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ISSN: 1439-0523

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: The occurrence of homozygous matromorphic progenis in Pisum sativum L. has, been assessed by using heterozygous female parents in intervarietal and intergeneric crosses. The pollen was subjected to three treatments, i.e. prickle pollination (delayed), gamma irradiation and giibberellic acid (GA3) application, The genetic status of the induced matromorphic progeny was determined by using, multiple gene markers. The frequency or occurrence of homomatromorphs was 3 to 7 per cent, which needs to be increased by pod, ovule or embryo culture, respectively.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1439-0523.1989.tb00332.x

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Linear and non-linear regression analysis of genotype X environment interactions in pearl millet (1988)

Virk, D. S. ; Virk, P. S. ; Mangat, B. K. ; [et al.]

Springer

Theoretical and applied genetics 75 (1988), S. 736-740

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ISSN: 1432-2242

Keywords: Pennisetum typhoides (Burm.) S. & H ; Pearl milet ; Linear and non-linear regression analysis ; Genotype X environment interaction

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Summary Regression analysis was computed on the grain yield of 15 single cross F1 hybrids of pearl millet (Pennisetum typhoides (Burm.) S. & H.) evaluated in 20 environments at 19 sites in India to assess the nature of genotype X environment interactions. Linear, quadratic, cubic, twoand three-intersecting straight line models were examined for fit. The interactions of six hybrids viz. MH 110, MH 113, MH 114, MH 115, MH 120 and MBH 110 were explained by the linear regression model. The response of the remaining nine hybrids was largely non-linear. The two and three-intersecting straight line models fit better than the quadratic and cubic models and explained non-linearity of response. The two-intersecting straight line models fit for 6 hybrids MH 106, MH 107, MH 112, MH 116, MH 117 and BJ 104. The response of MH 109 was best explained by a three-intersecting straight line model, but there still existed a significant remainder variation. The truncation of environmental range by assuming moving division points was more efficient than the fixed division points for the segmental regression models. The stability of hybrid varieties on the best fitting model has been discussed.