Rapid generation advancement in soybeans using immature seeds

Issue Date

8-2006

Abstract

In an attempt to shorten the generation length of soybeans through the use of immature seeds, and, thus, rapidly advance generations in producing improved inbred varieties of the crop, seeds of three soybean varieties of different maturity groupings were harvested at different ages of 5-day intervals starting at 20 days after flowering (DAF) to 40 DAF and subjected to different natural drying durations of 3-day intervals starting at 0 days or no drying to 9 days drying to determine the appropriate age to harvest immature seeds and the duration these seeds should be dried to give a good germination percentage. Seed maturity (days after flowering) and drying duration both significantly affected the germination percentage of all varieties, which, in general, increased significantly with increasing seed maturity up to 30 DAF and drying duration up to 6 days. Highly significant variety x drying duration interaction was observed with the late maturing variety responding better to longer drying than the earlier maturing ones. Seed maturity x drying duration was also highly significant. In general, germination was not much affected by seed maturity when the seeds were not dried but significantly increased with increasing seed maturity when first dried for 3 days or longer. The study failed to detect a variety x seed maturity interaction. The best combination to advance generations if germination of at least 80% is desired appeared to be 30 DAF seed maturity and 6 days drying duration in all varieties, which means a shortening of the generation length for each variety by 24 days. This would be equivalent to an additional generation that can be completed within a year for all varieties.

Source or Periodical Title

Philippine Journal of Crop Science

ISSN

0115-463x

Volume

31

Issue

2

Page

53-59

Document Type

Article

Frequency

tri-quarterly

Physical Description

tables, pictures

Language

English

This document is currently not available here.

Share

COinS