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Crossability of Japanese wheat cultivars with Hordeum bulbosum L.

1986; Japanese Society of Breeding; Volume: 36; Issue: 4 Linguagem: Inglês

10.1270/jsbbs1951.36.363

2185-291X

Masanori INAGAKI,

Plant Pathogens and Fungal Diseases

The crossabilities between Japanese wheat cultivars (Triticum aestivum L.) and tetraploid clones of Hordeum bulbosum L. were examined. In particular the effects of chemical agents on wheat crossability for improving crossing procedures in wheat haploid production were investigated. Twenty-two of the thirty-two wheat cultivars examined were crossable at frequencies of 10.4%-45.9% seed set. These crossable cultivars are genealogically derived from the progenies of crosses between Japanese local cultivars. The H.bulbosum genotypes used as pollinators also greatly influenced seed setting on wheat cultivar Fukuhokomugi with frequencies of 4.1%-50.0%However, non-crossability of Haruhikari could not be satisfactorily overcome when pollinated with the most promising clone of H. bulbosum. Crossing procedures with application of 2, 4-dichlorophenoxyacetic acid prior to pollination greatly increased seed setting on Fukuhokomugi, but did not appear to reduce effectively the incompatibility of Haruhikari. The present results suggest that this technique can be adopted to improve wheat haploid production using the bulbosum technique when crossable wheat genotypes are used as starting material.