Contribution of growth rate and harvest index to grain yield of oats (Avena sativaL.) following selfing and outcrossing of M1plants
✍ Scribed by B. S. Jalani; K. J. Frey; T. B. Bailey
- Book ID
- 104624782
- Publisher
- Springer
- Year
- 1979
- Tongue
- English
- Weight
- 411 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0014-2336
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✦ Synopsis
Three populations of oats, each with 790 lines, were derived from CI 7555: (a) one (M population) consisted of Mz-derived lines obtained from EMS treatment of naked seeds, (b) one (0 population) consisted of F 2derived lines from crosses of M 1 with check plants, and (c) one (C population) consisted of check lines.
About 98~ of the grain yield (GYD) variation in each population was due to variation in growth rate (GR) and harvest index (HI).
There was greater variation for both GR and HI in M and 0 than in the C population, showing that mutations were induced for both traits. Generally, mutations for these two traits were for reduced expression: high HI and GR are desired in a practical oat breeding program, so most induced mutations were deleterious.
Mutation breeding, either with direct selection or outcrossing to release the induced mutations, does not appear to be a desirable method for improving GR or HI of oats.