Donor Inbred Lines for Enhancing the Performance of Single‐Cross Sunflower Hybrids

Cheres, Mercy T.; Miller, J. F.; Knapp, Steven J.

doi:10.2135/cropsci1999.3951325x

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Other methods have been developed as alternatives to Dudley's modified method (Gerloff and Smith, 1988a,b; Bernardo, 1990). Although ranking of donors sometimes varies with different statistics, the correlations among donor statistics are usually positive and significant (Cheres et al, 1999). Finally, Metz (1994) demonstrated how to estimate the probability of net gain (PNG) from an inbred.…”

Section: Genotypes For Classes Of Loci Possible For An Elite Hybrid (mentioning

confidence: 99%

Identifying Inbred Lines Capable of Improving Ear and Stover Yield and Quality of Superior Silage Maize Hybrids

2002

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Maize (Zea mays L.) is an excellent feed, whether fresh, chopped, or ensiled. Silage maize hybrids have been developed for temperate‐cold regions of Europe and North America, but limited research has been done to develop silage hybrids for temperate and warm‐temperate regions. This study was conducted to identify inbred lines that could be used to enhance the stover and ear fractions of existing hybrids for warm‐temperate areas. Forty‐five single‐cross hybrids were developed from 10 inbred lines and evaluated in six environments. Ten inbred lines were evaluated for potential to improve the best hybrids by Dudley's and Metz's methodologies. Hybrids differed significantly (P < 0.01) for ear (EY), stover (SY), and whole‐plant dry matter yield (WY), in vitro digestibility of whole‐plant dry matter (iDW), and whole‐plant digestible dry matter yield (WDY), differences among hybrids were not significant for in vitro digestibility of ear (iDE) and stover (iDS). Four outstanding hybrids were selected as target hybrids for improvement on the basis of YSi (Kang's Yield‐Stability Statistic) of mean WDY and their stability across environments. Inbred lines that were able to increase SY were not the same ones that would increase EY. Inbred PR4 had outstanding potential to improve the SY of any hybrid. Inbred B84 had greatest potential to enhance EY. Inbred lines showed differential capacity to generate improvement according to the fractions that were evaluated. Finally, inbred lines from the North American Corn Belt did not demonstrate potential for enhancing SY when they were compared with local flint inbred lines.

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Section: Genotypes For Classes Of Loci Possible For An Elite Hybrid (mentioning

confidence: 99%

Identifying Inbred Lines Capable of Improving Ear and Stover Yield and Quality of Superior Silage Maize Hybrids

2002

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Pleiotropy of the branching locus (B) masks linked and unlinked quantitative trait loci affecting seed traits in sunflower

et al. 2009

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The discovery of unbranched, monocephalic natural variants was pivotal for the domestication of sunflower (Helianthus annuus L.). The branching locus (B), one of several loci apparently targeted by aboriginal selection for monocephaly, pleiotropically affects plant, seed and capitula morphology and, when segregating, confounds the discovery of favorable alleles for seed yield and other traits. The present study was undertaken to gain deeper insights into the genetics of branching and seed traits affected by branching. We produced an unbranched hybrid testcross recombinant inbred line (TC-RIL) population by crossing branched (bb) and unbranched (BB) RILs to an unbranched (BB) tester. The elimination of branching concomitantly eliminated a cluster of B-linked seed trait quantitative trait loci (QTL) identified by RIL per se testing. We identified a seed oil content QTL linked in repulsion and a 100-seed weight QTL linked in coupling to the B locus and additional unlinked QTL, previously masked by B-locus pleiotropy. Genomic segments flanking the B locus harbor multiple loci for domestication and post-domestication traits, the effects of which are masked by B-locus pleiotropy in populations segregating for branching and can only be disentangled by genetic analyses in unbranched populations. QTL analyses of NILs carrying wild B alleles substantiated the pleiotropic effects of the B locus. The effect of the B locus on branching was masked by the effects of wild alleles at independent branching loci in hybrids between monocephalic domesticated lines and polycephalic wild ecotypes; hence, the B locus appears to be necessary, but not sufficient, for monocephaly in domesticated sunflower.

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Investigating the physiological bases of predictable and unpredictable genotype by environment interactions using three-mode pattern analysis

Vega¹,

Hall

Kroonenberg

2002

Field Crops Research

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Donor Inbred Lines for Enhancing the Performance of Single‐Cross Sunflower Hybrids

Cited by 3 publications

References 19 publications

Identifying Inbred Lines Capable of Improving Ear and Stover Yield and Quality of Superior Silage Maize Hybrids

Identifying Inbred Lines Capable of Improving Ear and Stover Yield and Quality of Superior Silage Maize Hybrids

Pleiotropy of the branching locus (B) masks linked and unlinked quantitative trait loci affecting seed traits in sunflower

Investigating the physiological bases of predictable and unpredictable genotype by environment interactions using three-mode pattern analysis

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