A Study on ‘Genomewide Selection’ for Maize (<i>Zea mays</i> L.) Breeding in Japanese Public Sectors: Heritability of Maturity- and Yield-Related Traits in the Training Populations

Research was conducted to evaluate correlated effects of full-sib phenotypic recurrent selection for resistance to common rust (Puccinia sorghi Schw.) on ear quality traits in three sugary1 (su1) sweet corn (Zea mays L.) populations: Minn11, Minn14, and NECDR. Cycles 0, 1, 2, and 3 of each population were evaluated in both rust infested and nonrust infested environments. Generally, selection for rust resistance resulted in significant, but minor, decreases in ear and kernel size. Changes in specific traits varied with population. The nonsignificant cycle × environment interaction indicates similar responses occurred in all environments evaluated. Based on these results, selection for ear quality traits need not accompany selection for resistance to common rust if maintenance of ear quality is desired.

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Evaluation of progress in recurrent selection for specific combining ability in two open-pollinated maize (Zea mays L.) varieties

10.31274/rtd-180813-2184 ◽

1976 ◽

Author(s):

Ronald N. Walejko

Keyword(s):

Zea Mays ◽

Combining Ability ◽

Recurrent Selection ◽

Zea Mays L ◽

Specific Combining Ability ◽

Selection For

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PERFORMANCE UNDER STRESS OF ADVANCED CYCLES OF FOUR POPULATIONS OF CORN (Zea mays L.) IN AN S1 PER SE RECURRENT SELECTION PROGRAM

Canadian Journal of Plant Science ◽

10.4141/cjps81-005 ◽

1981 ◽

Vol 61 (1) ◽

pp. 29-36

Author(s):

O. A. ADARA ◽

L. W. KANNENBERG

Keyword(s):

Zea Mays ◽

Grain Yield ◽

Recurrent Selection ◽

Zea Mays L ◽

Selection Criterion ◽

Grain Filling ◽

Primary Selection ◽

Per Se ◽

Selection For ◽

Advanced Cycles

Two cycles of S1 per se recurrent selection were conducted in four populations of corn (Zea mays L.). The primary selection criterion was a performance index: grain yield divided by percent moisture at harvest. The original (C0) source material and first cycle (C1) of selection for each population were evaluated in a favorable (1977) and an unfavorable (1978) growing season. Second cycle (C2) materials were also included in the 1978 comparisons. In 1977, C1 yielded significantly more grain than C0 in three of the four populations. In contrast, performance of C1 and C2 materials in 1978 was inferior to C0 in all populations but one. The advanced cycles of only one population showed improvement over C0 in both years. Comparisons of the 1977 data for days to silking, grain yield, and percent ear moisture at harvest suggest that rate of grain filling in C1 was higher than in C0 for all populations. The higher rates of grain filling in the advanced cycles may have caused a carbohydrate deficiency under stress (1978) so that the leaves no longer functioned normally and kernel filling was terminated prematurely. In general, the four populations showed inherent differences in their respective responses to selection, to environmental stress, and to inbreeding.

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