TY  - JOUR
TI  - Quantification of vascular tissues in the peduncle of durum wheat cultivars improved during the twentieth century
AU  - Lopez-Garrido, E
AU  - Molina-Quiros, S
AU  - De la Puerta-Lopez, PG
AU  - Vidal-Bernabe, MD
AU  - Garcia-Del-Moral, LF
T2  - The International Journal of Developmental Biology
AB  - The grain yield of wheat has augmented in the last century due mainly to the use of cultivars with increased higher yield capacity. This work analyzes if this genetic gains in yield has been accompanied by similar increases in the size of the vascular system in the stem. Significant differences were obtained for cultivars; and dates of genetic improvement both in the area of the peduncle; area of the vascular tissues; and phloem and metaxylem areas. In spite of the large variations encountered for these characteristics between cultivars, no clear association was encountered between the genetic improvement and the magnitude of the vascular system in the peduncle of the spike, indicating that the amount of phloem in the modern varieties seems to be sufficient to sustain the maximum rate of grain growth. Nevertheless, the existence of a great genotypic variation in the vascular tissues of the peduncle found in this study could permit to improve the phloem transport capacity in durum wheat in the future.
PY  - 2001
VL  - 45
IS  - S1
SP  - S47
EP  - S48
J2  - Int. J. Dev. Biol.
LA  - en
SN  - 0214-6282
SN  - 1696-3547
UR  - https://ijdb.ehu.eus/article/01450047
Y2  - 2024/05/05/10:19:10
ER  -