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interspecific hybrid cultivars ( Egolf, 1981a , 1981b , 1986a , 1986b , 1987 , 1990 ; Pooler, 2006a ; Pooler and Dix, 1999 ) that successfully combined the powdery mildew resistance of L. fauriei with other desirable horticultural traits from L. indica

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Abstract

The interspecific baccharis hybrid ‘Centennial’ has been released by the Univ. of Arizona Agricultural Experiment Station as a landscape plant suited for arid regions. The name ‘Centennial’ was given to commemorate the 100th year of the opening of the Univ. of Arizona as a land grant college.

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zones that nearly span the latitudinal range of the United States. Thus, if systematically exploited for breeding interspecific hybrids, C. americana may enable the expansion of commercial hybrid hazelnut production to a wide portion of the eastern and

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et al. (2001) . Other interspecific crosses between H . macrophylla and H . arborescens or H . macrophylla and H. quercifolia failed because of postzygotic barriers. The putative hybrid seedlings died at the cotyledonary stage or the first

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-resistant and interspecific tomato hybrid rootstocks have also been developed ( King et al., 2010 ). Moreover, vegetable grafting has been used successfully to minimize the deleterious effects of a wide range of abiotic stresses related to salinity ( Colla et al

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eastern Asia wild species R. parvifolius . However, the IP-1 interspecific hybrid has shown problems with prickles and large drupelets that prevent the development of well-formed fruit. Therefore, we carried out a backcross between IP-1 and ‘Indian Summer

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: aesthetic and extreme drought tolerance qualities of S. rotundifolia but greater tolerance of wet, disturbed soils and faster growth of S. argentea . This study describes an interspecific hybrid between the two species in terms of genetics and leaf

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onto different rootstocks under high-temperature stress conditions in greenhouses. Interspecific hybrids have been used for grafting tomato to increase yield ( Djidonou et al. 2017 ), drought tolerance ( Nilsen et al. 2014 ), soil-borne disease

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; Sacks et al., 2003 ; Wang et al., 2009 ). One of the promising wild species being investigated for creating a perennial sunflower crop is H. tuberosus . Interspecific hybrids between H. annuus and H. tuberosus also show promise as breeding material

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Abstract

Pollen germination differed significantly between and within 3 interspecific hybrid populations and their parents. Pollen germination of populations of ‘Sharpblue’ (Vaccinium X sp.) × V. myrsinites Lamark (38%) and ‘Sharpblue’ × V. darrowi Camp (33%) was lower than mid-parent means of 45% and 37%, respectively. ‘Avonblue’ × V. myrsinites averaged higher in pollen germination than the mid-parent, 42% vs. 32%. Pollen germination of ‘Sharpblue’ × V. myrsinites hybrids varied most in pollen germination, ‘Avonblue’ × V. myrsinites hybrids least, and ‘Sharpblue’ × V. darrowi hybrids intermediate.

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