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ARS Home » Plains Area » College Station, Texas » Southern Plains Agricultural Research Center » Crop Germplasm Research » Research » Publications at this Location » Publication #146192
Title: HETEROSIS AND GENE ACTION OF BOLL WEIGHT AND LINT PERCENTAGE IN HIGH QUALITY FIBER PROPERTY VARIETIES IN UPLAND COTTON

Author
item YUAN, YOU-LU - NANJING AGRIC UNIV
item ZHANG, TIAN-ZHEN - NANJING AGRIC UNIV
item GUO, WANG-ZHEN - NANJING AGRIC UNIV
item PAN, JIA-JU - NANJING AGRIC UNIV
item Kohel, Russell

Submitted to: Acta Agronomica Sinica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/28/2002
Publication Date: 4/28/2002
Citation: Yuan, Y., Zhang, T., Guo, W., Pan, J., Kohel, R.J. 2002. Heterosis and gene action of boll weight and lint percentage in high quality fiber property varieties in upland cotton. Acta Agronomica Sinica. 28:196-202.

Interpretive Summary: High fiber-quality cottons often have lower productivity than cottons with moderate fiber quality. This test was conducted to determine if a group of new high fiber-quality cottons represented any greater potential for increased productivity. Boll weight and the percentage of lint to seed were the traits measured to determine productivity. Crosses were made among the group of cottons and it was determined that there was potential for increasing productivity. However, the analysis of the correlation between increased productivity and fiber quality showed that increased productivity was still associated with lower fiber quality.

Technical Abstract: Twenty F1 combinations, crossed in a complete diallel crossing design among 5 varieties and strains differing in fiber properties, were used to evaluate the heterosis and gene acton of boll weight and lint percentage in high quality fiber property varieties in upland cotton in 1998 and 1999 at Nanjing. There were small interactions with the environment, no maternal effects, and additive gene effects predominated, amounting to 51.2% and 65.4% for boll weight and lint percentage, respectively. Dominant effect were also high, 32.6% and 16.8% respectively. The population mean heterosis of boll weight and lint percentage over the mid-parental mean were 13.3% and 3.5%, respectively, and significance. However, boll weight showed no significance over parental F1 heterosis of the better parent (2.0%); while the lint percentage expression. It was shown clearly that the F1 combinations crossed between parents with similar performances had relatively high dominant effects and significant positive F1 surpassing parental heterosis (F1 heterosis over the better parent); while no F1 combination crossed between the parents with prominent mutual difference surpassed the higher parent in yield componenets, which indicated that among those parents with less difference and close relationships, there still existed sufficient genetic variation or certain mechanism for creating variation and achieving greater advances in breeding. Correlation analyses also indiated that there still existed severely undesirabe negative correlations between yield and fiber properties as well as the difficulties for their simultaneous improvements.