The relationship between fiber initiation and lint percentage in cotton. | [Pakistan Journal of Botany • 2014]

Author(s):

1. Guo Xian: College of Agronomy/National Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, China

2. Ma Jun: College of Agronomy/National Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, China

3. Guo Yuping: College of Agronomy/National Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, China

4. Sun Mizhen: College of Agronomy/National Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, China

5. Zhou Jiajia: College of Agronomy/National Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, China

6. Yuan Yanchao: College of Agronomy/National Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, China

7. Zhang Tianzhen: State Key Laboratory of Crop Genetics and Germplasm Enhancement, Cotton Research Institute, Nanjing Agricultural University, Nanjing, China

8. Sun Xuezhen: College of Agronomy/National Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, China

9. Song Xianliang: College of Agronomy/National Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, China

Abstract:

In this study, cytological observation of cotton fiber initiation from 1 d before anthesis to 3 d post anthesis (dpa) was performed using a scanning electron microscope. Six cotton chromosome segment introgression lines and their recipient/donor parents were used as materials. Results showed that fiber cell protrusions were highly related to genotype and germplasm, but fiber cell elongations were closely related to lint percentage. Fiber cell protrusions and elongations initially formed on the funicular crest, extended to the chalaza cap and the middle part of the ovule, and finally reached the micropyle. Fiber protrusion density at 1 dpa and elongation density at 2 dpa were observed in the following parts from highest to lowest: funicular crest > chalaza cap > middle part of the ovule > micropyle. The fiber protrusion density at 1 dpa and the fiber elongation density at 2 dpa were positively correlated with lint percentage and lint index but negatively correlated with seed index. The results of gray relational analysis were consistent with the correlation analysis results. Early fiber elongation contributed positively to protrusion density and elongation density, thereby resulting in a high lint percentage.

Page(s): 2227-2238

DOI: DOI not available

Published: Journal: Pakistan Journal of Botany, Volume: 46, Issue: 6, Year: 2014

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