HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Villareal, R. L. Articles by Mujeeb-Kazi, A. Search for Related Content PubMed Articles by Villareal, R. L. Articles by Mujeeb-Kazi, A. Agricola Articles by Villareal, R. L. Articles by Mujeeb-Kazi, A.

Agronomic Performance of Related Durum Wheat (Triticum turgidum L.) Stocks Possessing the Chromosome Substitution T1BL.1RS

CIMMYT, International Maize and Wheat Improvement Center, Lisboa 27, Apartado Postal 6-641, Delegacion Cuauhtemoc, 06600 Mexico, D.F., Mexico

^* Corresponding author (Email: rvillareal{at}cimmyt.mx).

Comparisons of bread wheat (Triticum aestivum L.) germplasms provided evidence that the T1BL.1RS chromosome substitution enhances agronomic performance and, particularly, grain yield. There are no known reports of the effect of this translocation in durum wheat (Triticum turgidum L.), however. The objective of this study was to determine the effect of the T1BL.1RS chromosome on grain yield, yield components, and other agronomic traits using 22 related durum lines (11 homozygous for chromosome 1B, and 11 homozygous for T1BL.1RS). The test lines were produced by substituting the T1BL.1RS chromosome in T. turgidum cultivar Altar 84 (1B, 1B) through backcrossing. Two field trials were evaluated under optimum (five irrigations) and reduced (one irrigation) moisture conditions at the Mexican National Institute of Forestry, Agriculture and Livestock, Campo Agricola Experimental Valle del Yaqui (CAEVY) Research Center, Sonora, Mexico, during the 1993–1994 and 1994–1995 crop production cycles. The results indicated that the T1BL.1RS genotypes have increased above-ground biomass at maturity, increased 1000-kernel weight, and increased test weight in both irrigation treatments. The T1BL.1RS lines also possessed longer spikes and headed and matured later. The IB lines produced more kernels m^–2 than the T1BL.1RS lines in all tests, however. The yield superiority and longer grainfilling period of the T1BL.1RS translocation group were detected only under reduced irrigation conditions. The average effect of T1BL.1RS across years and irrigation treatments was to increase grain yield and aerial biomass by 3.5 and 3.3%, respectively. The yield advantage was attributed to increased kernel weight, test weight, and spike length.

Received for publication November 13, 1996.

This article has been cited by other articles:

				W. Kim, J. W. Johnson, P. S. Baenziger, A. J. Lukaszewski, and C. S. Gaines Agronomic Effect of Wheat-Rye Translocation Carrying Rye Chromatin (1R) From Different Sources Crop Sci., July 1, 2004; 44(4): 1254 - 1258. [Abstract] [Full Text] [PDF]

				M.P. Reynolds, S. Rajaram, and K.D. Sayre Physiological and Genetic Changes of Irrigated Wheat in the Post-Green Revolution Period and Approaches for Meeting Projected Global Demand Crop Sci., November 1, 1999; 39(6): 1611 - 1621. [Abstract] [Full Text]