Molecular mapping of genes determining hairy leaf character in common wheat with respect to other species of the Triticeae

Abstract

Two major genes controlling leaf pubescence were mapped on chromosomes 4BL (Hl1) and 7BS (Hl2 Aesp ) in wheat (Saratovskaya 29) and a wheat/Aegilops introgression line (102/ 00 I ), respectively, together with quantitative trait loci (QTLs) determining hairiness of the leaf margin (QHl.ipk-4B, QHl.ipk-4D) and auricle (QPa.ipk-4B, QPa.ipk-4D) on the long arms of chromosomes 4B and 4D, respectively. The QTLs on chromosome 4D were contributed by a synthetic wheat and, therefore, originated from Aegilops tauschii. The homoeologous group 4 wheat/ A. tauschii genes/QTLs detected in the present study were aligned with the barley pubescence genes Hln/Hsh and Hs b and the hairy peduncle rye gene Hp1. The locus seems to be pleiotropically responsible for the pubescence of diVerent plant organs in diVerent species of the Triticeae. Another homoeologous series may be present on the short arms of the homoeologous group 7 chromosomes, based on the results of an allelic test cross between the Chinese local cultivar Hong-mang-mai carrying Hl2 and the wheat/ Aegilops speltoides introgression line 102/00 I .

Mapping resistance to the bird cherry-oat aphid and the greenbug in wheat using sequence-based genotyping

“…It is probable that the pubescence locus we found is allelic to, or the same as the hairy leaf gene Hl1 previously reported by Dobrovolskaya et al (2007) in chromosome 4BL of Triticum dicoccoides L. However further evaluations are required to fully determine if this locus is the same as the one we found in Triticum dicoccum Schrank.…”

Interactions between leaf pubescence genes in bread wheat as assessed by high throughput phenotyping

“…S29 carries two genes for leaf pubescence (Doroshkov et al 2011). One of them, Hl1, was localized and mapped to chromosome 4B (Maystrenko 1976;Dobrovolskaya et al 2007); chromosome location of the second gene is still unknown. Here, we temporarily designat it as Hl3.…”

“…Some, but not all, are secretory (Solereder 1908), while others act to give protection against both biotic and abiotic factors (Johnson 1975;Valverde et al 2001). It has been shown that leaf trichomes taking part in preserving the photochemistry apparatus (Galmés et al 2007) affect drought tolerance, apparently by limiting transpiration (Barnabás et al 2008). Using the isogenic lines of spring wheat cv.…”

“…Pshenichnikova et al (2007) using the same method located gene Hl2 aesp introgressed into bread wheat from Aegilops speltoides also on chromosome 7B. The Hl1 gene was mapped on the long arm of chromosome 4B of wheat whereas Hl2 aesp was mapped on the short arm of 7B chromosome (Dobrovolskaya et al 2007). Hl2 aesp is thought to be allelic to Hl2 (Dobrovolskaya et al 2007).…”

Genetic analysis and fine mapping of the pubescence gene GL6 in rice (Oryza sativa L.)

“…These transcription factors are transferred from the pubescence to the neighboring cells and compete for binding sites with GL1 and GL3, preventing pubescence growth. Wheat genes Hl2 and Hl2Aesp control pubescence growth and are located on chromosomes 4BL and 7BS [19]. A set of GLOSSY genes in corn has been cloned, which affects pubescence growth as well as morphology and is related to cuticular wax synthesis.…”