Grain-fill characteristics of early maize strains selected for variableR-njexpression
✍ Scribed by W. L. Alexander; H. Z. Cross
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 353 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0014-2336
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✦ Synopsis
Grain-fill
rates and durations were estimated for three early maize (Zea may.7 L.) strains developed by mass selection for variable R-nj aleurone color expression.
Strains selected for high, random, and low color expression were evaluated for rate of dry matter accumulation (RDMA), effective filling period duration (EFPD), and lag period duration (LPD). Strains from cycles 3 and 4 weregrown in 1980 and 198 1, respectively, to test the hypothesis that selection for variable R-nj expression had changed rate and/or duration of grain-till.
Results indicated that while selection for high R-nj expression increased RDMA and decreased EFPD, low color selection reduced RDMA and increased EFPD. LPD was increased slightly by high color selection. The relationships of these characteristics to previously observed yield, stability, and ear moisture differences among these strains are discussed.