Progress in Developing High Tannin Cotton for Heliothis Resistance

T.P. Altamarino, C.W. Smith, J. Love, A.A. Bell, and R.D. Stipanovic


 
ABSTRACT

Tannin content is believed to be correlated with resistance to certain insects. Leaves of 9 breeding lines reported to have elevated levels of condensed tannins with varying degrees of resistance to spider mites and 5 commercial checks were analyzed for tannin and terpenoid contents. 86-E-20 had the highest tannin content for 2 sampling dates, followed by 86-E-7, Pima S6, 86-E-3 and 86-E-6. Tannin contents of these entries were 1.5 to 2 times as much as Stoneville 213 and CS8310, a spider mite resistant variety released in 1983.

Other plant parts analyzed for tannin content included sepals of white flowers, bracts of white flowers, carpel wall of young boll and carpel wall of full-sized boll. No differences were found among entries in terms of bracts and carpel wall of bolls. CAMD-E and Stoneville 213, however, bad higher tannin content in sepals of white flowers than 86-E-20 and CAB-CS. For leaves at 6th main stem node, 86-E-20 and CAB-CS had higher tannin than CAMD-E and Stoneville 213.

In the terpenoid analysis, 86-E-20 had high to fairly high content of beliocides and gossypol. Pima S6 had the highest HGO content.

A diallel crossing scheme was initiated to examine the breeding behavior and heritability of condensed tannins. The entries used are: 86-E-20, 86-E-8, 86-E-3, Stoneville 213 and TAMCOT CD3H.



Reprinted from 1988 Proceedings: Beltwide Cotton Production Research Conferences pg. 553
©National Cotton Council, Memphis TN

[Main TOC] | [TOC] | [TOC by Section] | [Search] | [Help]
Previous Page [Previous] [Next] Next Page
 
Document last modified Sunday, Dec 6 1998