The Inheritance of Hull-Lessness in Oat Hybrids

Abstract

THE purpose of this paper is to set forth some results obtained in certain crosses between the hull-less types of oats and some of the hulled forms. The hull-less types belong to the species Avena nuda. The origin of these forms is not definitely known, although, according to Carleton,2 they appear to have come from central and eastern Asia. Reports are to the effect that a certain form of this oat has been cultivated in China for a thousand years or longer. These types are not generally cultivated in any other countries and perhaps due to this fact little study has been made of the various hull-less types and their possible origin. From some observations made on our material it seems quite possible that these hull-less forms may have originated through putative changes. For example, in a pure line of the variety Sixty Day certain spikelets suddenly appeared which were very similar to the true hull-less forms in having the caryopsis loosely held in the glumes and an increased number of flowers per spikelet. These seeds were tested, but did not reproduce this hull-less tendency. A large number of similar cases have been observed particularly with hybrids, although none of these

Genetic and molecular characterization of multiflorous spikelet in oat

“…The actions of the different alleles were established considering the involvement of modifying genes. Our results are consistent with the available literature, in which a large number of studies have indicated that the action of one major gene controls multiflorous spikelet formation (Caporn, 1918;Love and McRostie, 1919;Boland and Lawes, 1973;Kibite and Taylor, 1994;Cabral et al, 2000). Phenotypic screening for the multiflorous spikelet trait clearly demonstrated a 1:1 ratio, in which approximately 50% of the evaluated RILs for both genetic populations exhibited 100% normal spikelets.…”

“…The inheritance of the multiflorous spikelet trait has been investigated in several studies over the past century, and the results have indicated that the action of a major gene controls the trait and has a strong effect on the phenotype (Caporn, 1918;Love and McRostie, 1919;Boland and Lawes, 1973;Kibite and Taylor, 1994;Cabral et al, 2000). However, oat breeders and researchers believed that this major gene also participated in the formation of naked grains (Simons et al, 1978;Ougham et al, 1996).…”

Genetics and identification of markers linked to multiflorous spikelet in hexaploid oat

“…Several studies demonstrated the character controlled by a single gene with a strong effect on the phenotype (Gaines 1917, Caporn 1918, Love and McRosstie 1919, Boland and Lawes 1973, Cabral et al 2000. Therefore, the results of the genetic analysis for the UFRGS 01B71114-1-3 x UFRGS 006013-1 population corroborate the results reported in previous studies.…”

Análise genética do caráter nuda em panículas de aveia hexaplóide

“…This fact may be associated with the number of panicles evaluated and/or erroneous classification of the panicles in the F 2 generation. The same occurred in studies carried out by Gaines (1917) and Love and McRostie (1919), which also showed non-standard behavior in the F 3 generation, thus affirming that the panicles of the F 2 generation had been wrongly classified, i.e., that hulled grains could have been dehulled during threshing, or that other factors affected the expression of naked grains. In spite of the small number of panicles evaluated in this study, the data of the F 3 generation show agreement (Table 4) with the hypothesis proposed in the F 2 generation (Table 3).…”