Heritabilities and Interrelationships of Shortness and Other Agronomic Characters in F3 and F4 Generations of Two Wheat Crosses (Triticum aestivum L. em Thell)1
- M. V. Reddi,
- E. G. Heyne and
- G. H. L. Liang2
Two wheat crosses (Triticum aestivum L. em. Thell), ‘Norin’ 10/3* ‘Pawnee’ //2* ‘Kaw’ and Norin 10/5*Pawnee, were studied for heritability and for interrelationships among plant height, spike length, tillering ability, and kernel weight. Norin 10 is a short cultivar introduced from Japan, while Kaw and Pawnee are adapted cultivars in Kansas.
Heritabilily estimates were calculated by conventional and standard unit regression (F4 on F3) methods. The estimates of heritability were relatively high for culm length in both crosses and medium for kernel weight in the cross Norin 10/3*Pn//2*Kaw, indicating selection for culm length or kernel weight would be effective. Heritability estimates for the other two characters were low.
Culm length and kernel weight were positively and highly significantly correlated in the two crosses. The correlation between spkie length and kernel weight was negative or low for both crosses. The lines with shorter culm length tended to have longer spikes and low kernel weight, characteristic of the Norin 10 donor parent.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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