A Six Year Summary of Yields With New Jersey Hybrids in Michigan

Price, H. C.; Baughan, R. A.

doi:10.17660/actahortic.1990.271.20

Cited by 4 publications

(2 citation statements)

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“…In relation to origins and hybrid performance in asparagus, it was mentioned that there is no evidence of any clear heterotic pattern for yield, but some breeding programs intuitively included parents with some divergence [27]. In our study, the top four experimental hybrids included in three cases UC157 (13) and in one case KBF (1) as one of the parents. The opposite parents involved were in two cases Argenteuil (12), and in one case Limburgia (3) and Espárrago de Navarra (4).…”

Section: Discussionmentioning

confidence: 91%

“…After applying the model of analysis of [12] to the data of [4,13], the authors of [1] found that asparagus hybrid yield was explained (R 2 ) in 56 and 64% by the general combining ability (gi) of the parents, and the relative importance of the general combining ability variance upon the variance due to crosses was 0.57 and 0.65, respectively. Similarly, it was found in [7] that the Baker coefficient [14], which expresses the relative importance of the general combining ability variance upon the total genetic variance, was of an intermediate nature for total and marketable yield.…”

Section: Introductionmentioning

confidence: 99%

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Combining Ability and Heterosis for Market Yield in Green Asparagus

2022

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In asparagus, current cultivars are mostly hybrids (known as clonal hybrids) derived from crosses between two parents, female and male, with good combining ability. Despite the fact that clonal hybrids have been obtained for more than 40 years, studies of the heterosis and combining abilities involved are limited. Similarly, there are no published studies regarding the association between genetic divergence and heterosis. In this sense, we evaluated two sets of diallel crosses including 12 accessions from 11 different origins for marketable green asparagus production. Parentals were also included as a way to assess heterosis. The variation for market yield was highly significant for both sets. Best parent heterosis was over 100% in four cases. The best experimental hybrid did not significant differ from the Atticus F1 all-male check. The general combining ability (GCA) and specific combining ability (SCA) were significant, with a relative greater contribution of the SCA than the GCA to the variation among crosses. The association between genetic distances and heterosis failed to be significant. The best experimental hybrids were obtained when UC157 and KBF (origins from the USA and the UK) were crossed to Argenteuil, Limburgia and Espárrago de Navarra (origins from France, the Netherlands and Spain).

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Section: Discussionmentioning

confidence: 91%