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Agricultural Science Digest, volume 25 issue 1 (march 2005) : 15 - 18

STUDY OF CHANGES ASSOCIATED WITH RECURRENT HALF-SIB SELECIlON IN POPULATION OF SUNR..OWER (H. ANNUUS L.).

R.K. Khulbe, D. Roy ann V.K. Yadav

Affiliations

¹Department of Genetics and Plant Breeding, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, India

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Cite article:- Khulbe R.K., Yadav V.K. ann Roy D. (2024). STUDY OF CHANGES ASSOCIATED WITH RECURRENT HALF-SIB SELECIlON IN POPULATION OF SUNR..OWER (H. ANNUUS L.).. Agricultural Science Digest. 25(1): 15 - 18. doi: .

ABSTRACT

The mean leaf length, leaf width, head diameter and seed yield per plant progressively decreased in all the three populations with advancing generations. The lower mean values for different traits of first cycle selected populations were due to raising of these populations in off-season environment. The variances for head diameter and seed yield per plant showed a progressive decrease but plant height and leaf length recorded an increase. The skewnesses for plant height, leaf length, leaf width and head diameter showed increase in advancing generations whereas for seed yield per p1ant changes in skewness were not significant. Kurtoses showed no trend except in case of head diameter which showed a progressive reduction over advancing generations. These observed changes in means, variances, skewnesses and kurtoses can be attributed to the effect of selection.

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REFERENCES

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Fick, G.N. and Reheder, DA (1977). In: Proc. 2nd Sunflower Forum (Fargo, N.D.), p. 26-27.
Mamonov, I.F. and Selektsiya, I. (1991). Semenovodstvo Moskava, 2: 13-15.
Mather, K. and Jinks, J.L. (1971). Biometrical Genetics. Chapman and Hall, London.
Roy, D. (2000). Plant Breeding-Analysis and Exploitation of Variation. Narosa, New Delhi.
Snedecor, GW. and Cochran, w.G. (1967). Statistical Methods. Oxford and IBH, New Delhi.
Sprague, G.F. and Eberhart, SA (1977). In: Corn and Corn Improvement (Sprague, G.F. ed.). Am. Soc. Agron. Madison, W.S. P. 305-362.
Yadav, V.K (2000). Ph.D. Thesis, G.B.Pant University of Agric. and Tech., Pantnagar, India.

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STUDY OF CHANGES ASSOCIATED WITH RECURRENT HALF-SIB SELECIlON IN POPULATION OF SUNR..OWER (H. ANNUUS L.).

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