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  • Author or Editor: David W. Ramming x
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Abstract

Embryos of plum, peach, and nectarine (less than 1 mm long) enlarged during in ovulo embryo culture. Optimum culture conditions for Prunus embryo enlargement consisted of Stewart and Hsu support system and medium with 6% sucrose at 27°C. ‘Blackamber’ plum embryos subsequently cultured on a Smith et al. medium and stratified at 1° for 1 month produced plants. This provides an easy method to culture small embryos from very early-maturing Prunus genotypes, and allows their use in breeding programs for the improvement of early-maturing genotypes.

Open Access

'Galaxy' is being released by United States Department of Agriculture, Agriculture Research Service to provide a fresh market, mid-season peento shaped peach that is larger, firmer and more attractive than 'Stark Saturn'. It ripens in late June in the Parlier area of the San Joaquin Valley of California. It has white flesh that is low-acid, sweet, melting and clingstone.

Free access

Abstract

‘Sunfre’ nectarine [Prunus persica (L.) Batsch] has been released to provide a large, productive, high quality, attractive nectarine for areas in Florida which has a minimum of 500 chilling hours below 7°C.

Open Access

Abstract

‘Nemared’ is a new peach rootstock [Prunus persica (L.). Batsch] that combines vigorous growth in the nursery to permit early budding, root-knot nematode resistance, and red leaves to facilitate identification (Fig. 1).

Open Access

Abstract

‘Blackamber’ (Fig. 1) is a black, Japanese-type plum that resembles ‘Friar’ but ripens earlier and extends the season of ‘Friar’-type plums.

Open Access

Abstract

‘Castlebrite’ is an early-maturing apricot (Prunus armeniaca L.) for the fresh market with exceptional color and firmness. The fruit ripens toward the end of May, with ‘Pinkerton’ and about 4 weeks before ‘Blenheim’.

Open Access