Relationship among diploid wheats based on yield traits
1998
Rafi, M.M. | Waines, J.G. (University of California (USA). Department of Botany and Plant Sciences)
Information regarding wild genomes/species relationships is vital for deciding on the inclusion of a particular relative in a crossing program for wheat (Triticum aestivum L. subsp. aestivum). There is also lack of information on the yield traits of the various B, A and D genome species. Seventy-one wild and domesticated diploid wheats were grown under field conditions in a randomized complete block design with three replications. The analysis of means revealed that for straw yield and kernel weight, the tall and large-kernel A genome accessions were significantly superior to the dwarf and small-kernel B genome accessions. For biomass, harvest index and grain yield, the means of B and D genome accessions were significantly greater than the means of A genome accessions. Carbon isotope discrimination value was lowest in one of the B genome species, which is an indicator of high water-use efficiency. Contrast studies showed significant differences among the species and between the genomes for various yield traits. Relationships based on yield traits among the species and between the genomes are discussed
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