Generation mean analysis for forage yield and quality in Kenaf

Authors

1 Department of Biological Sciences, Bushehr branch, Islamic Azad University, Bushehr, Iran.

2 Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysi, 43400 Serdang, Selangor, Malaysia.

3 Department of Seed and Plant Production and Breeding Research, Agricultural and Natural Resources Research Center, Golestan, Iran.

4 Faculty of Technical and Vocational Studies, Sultan Edris Education University (UPSI), 35900, Tanjong Malim, Perak, Malaysia.

5 Department of Agriculture, Firoozabad Branch, Islamic Azad University, Postal code: 74719-13113, Firoozabad, Iran.

6 Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

7 Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

Abstract

The objective of this study was to estimate heritability, heterosis, and genetic parameters involved in the control of forage yield and quality in kenaf populations, using analysis of generation means. Two crosses were used; Cuba 2032×Accession 75-71 and IX51×Everglade 41. Experimental material comprised of P1 and P2, their F1 and F2 and BC1P1 and BC1P2 generations. The effects of generations were significant for all traits in both crosses. Results revealed that both additive and non-additive effects were important for the inheritance of the traits in both crosses. The additive gene effects had a higher contribution than dominance gene effects, for most of the traits in cross 1, while dominance gene effects had a greater contribution than additive gene effects, for most of the traits in cross 2. Broad-sense heritability was high for the majority of traits in two crosses, while narrow-sense heritability was higher in cross 1 than in cross 2 for all traits. In cross 2, heterosis estimates were higher than those of cross 1 for most of the traits. Thus, selecting the segregating generations would lead to a significant improvement for forage yield. 

Keywords


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