Performance of Avena sativa L./Avena fatua L. Backcross lines

Abstract

Although wild oats (Avena futuu L.) have been considered a potential source of genes for cultivated oat (Avenu sativa L.) improvement, most progenies of A. sutiva/A. futuu crosses have weak straw and are very susceptible to crown rust (Puccinia coronuta CDA. var. avenae FRASER and LED.). Backcrossing to A. s&vu has been suggested as a method of improving progeny lines while introducing new genes from wild oats to cultivated oats. In this study, A. sativa/A. futua Fi hybrids were backcrossed twice to A. sativu, and lines from three backcross populations were selected on the basis of agronomic performance in segregating generations. The A. sutiva recurrent parents were Dal (tall and late) and Stout (short and early).Backcross lines and recurrent parents were evaluated in five performance trails from 1983 through 1985. There was significant variation among backcross lines for most traits, but most backcross lines did not produce higher grain and straw yields than their A. sutivu parent. Several backcross lines were higher than their recurrent parent in test weight and groat percentage. A line derived from Stout, 175BC2-6, was considered the most promising backcross line in the study. This line produced more grain, had heavier kernels, and headed 3.3 days earlier than Stout. Although 175BC2-6 does not have sufficient straw strength and crown rust resistance to be released as a cultivar, it is considered to be a new source of high grain yield, high test weight and earliness for oat breeding.

Deciphering the dynamic gene expression patterns of pollen abortion in a male sterile line of Avena sativa through transcriptome analysis at different developmental stages

“…Sterile oat plants were first identified in the field by the Shanxi Academy of Agricultural Sciences (Shanxi Province, China) in 1994 and were named the CA male sterile (CAMS) oat line [ 12 ]; oat sterility was identified as a recessive nuclear sterile plant based on infertility characteristics and cytological identification. The germplasm Stout is an early-maturing, high grain-yield, low groat protein-percentage, and short-strawed cultivar that was developed at Purdue University [ 48 , 56 ]. The anther, microspore mother cells and microspores of CAMS line were imaged with the Olympus digital microscope.…”

North American Wild Relatives of Grain Crops

“…It thrives in cultivated oat fields and among small grain cereals in general. Hybrids between the hexaploid species, including A. sativa and A. fatua, normally are sufficiently fertile to produce an F2 population (Stevens and Brinkman 1982). However, meiotic irregularities in the form of univalent, inversions, and translocations have been reported (Thomas 1992).…”