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- Title
Genetic changes in plant growth and their associations with chromosomes from Gossypium barbadense L. in G. hirsutum L.
- Authors
Jixiang Wu; Jack McCarty; Sukumar Saha; Johnie Jenkins; Russell Hayes
- Abstract
Abstract Cotton (Gossypium spp.) plant growth is an important time-specific agronomic character that supports the development of squares, flowers, boll retention, and yield. With the use of a mixed linear model approach, we investigated 14 cotton chromosome substitution (CS-B) lines and their chromosome-specific F2 hybrids for genetic changes in plant growth that was measured during the primary flowering time under two environments. The changes in additive and dominance variances for plant height and number of mainstem nodes are reported, showing that additive effects for these two traits were a key genetic component after initial flowering occurred in the field. Time-specific genetic variance components were also detected where phenotypic values observed at time t were conditioned on the events occurring at time t − 1, demonstrating new genetic variations arising at several time intervals during plant growth. Results also revealed that plant height and number of nodes shared some common influence due to additive effects during plant development. With the comparative analyzes, chromosomes associated with the genetic changes in plant growth were detected. Therefore, these results should add new understanding of the genetics underlying these time-specific traits.
- Subjects
PLANT growth; PLANT genetics; SEA Island cotton; PLANT chromosomes; BIOLOGICAL variation; PLANT development; LINEAR statistical models
- Publication
Genetica, 2009, Vol 137, Issue 1, p57
- ISSN
0016-6707
- Publication type
Article
- DOI
10.1007/s10709-008-9350-y