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Comparison of Progeny‐Testing Methods in Lolium perenne L.
Author(s) -
Posselt U. K.
Publication year - 1989
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1989.tb00368.x
Subject(s) - biology , lolium perenne , inbred strain , genotype , lolium , agronomy , genetic variation , dry matter , horticulture , zoology , poaceae , botany , genetics , gene
From 22 genotypes, selfed (S 1 ) and testcross progenies were investigated. The latter were generated by i) polycross (PX) and ii) 2 topcrosscs (TC) using cms‐inbred lines as a tester. Progenies were tested for annual dry matter yield in 3 successive years, the 3‐year average was 76.7 dt/ha for S, and 76.9, 80.1 and 74.5 for PX, TC 1 and TC 2, respectively. Genetic variance was highest for S 1 (20.42), while the average of the 3 tcstcrosses was 12.22. However, the genotype‐year interaction variance of S, Was 52.21, being 2–3 times greater than for the 2 topcrosscs. PX progenies were the most stable across years. Predicted response to selection was highest for S 1 (10.4 %). Genetic correlation (r g ) between S 1 and the testcrosses was highest with TC 2 (r g = 0.5931 44 ).