Adriana SESTRAS et al. (2007) The Segregation of Tree Habit on Pear Seedlings in Six Hybrid Combinations

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The Segregation of Tree Habit on Pear Seedlings in Six Hybrid Combinations

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CONTRIBUTORS:

	Author:	Adriana SESTRAS (Fruit Research Station, Cluj-Napoca, Romania)
	Author:	Radu E. SESTRAS (University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, Romania)
	Author:	Doru PAMFIL (University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, Romania)
	Author:	Adrian BARBOS
	Author:	Lucica MIHALTE (University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, Romania)

PROCEEDINGS TITLE:

Bulletin of University of Agricultural Sciences and Veterinary Medicine - Horticulture

YEAR:

2007

PUB TYPE:

Conference Paper in Proceedings

PAGES:

764 - n/a

SUBJECT(S):

pear; diallel cross; F1 hybrids; tree habit; breeding

DISCIPLINE:

Plant Sciences

HTTP:

http://luci.academicdirect.ro/papers/BUSAMV_H_2007_764.pdf

LANGUAGE:

English

PUB ID:

103-437-798 (Last edited on 2008/08/03 05:40:15 GMT-6)

SPONSOR(S):

ABSTRACT:
Trees habit is an important trait in pear breeding and pear culture. The segregation for trees habit of F1 pear hybrids belonging from six combinations was analysed. The seedlings originate in incomplete diallel cross, effectuated with four genitors (Comtesse de Paris, Milenium, Virgiliu Hibernal, Cluj 89-1-81 selection), were framed in six classes of growth (after UPOV Guidelines), respectively architectural ideotype: 1. Fastigiate; 2. Upright; 3. Semi-upright; 4. Spreading; 5. Drooping; 6. Weeping.In each combination, the majority of F1 hybrids had spreading habit (between 57% in Comtesse de Paris x Milenium and 81% in Milenium x Cluj 89-1-81). The occurrence of high percentages of spreading habit seedlings in all combinations (see the table) suggests that this ideotype of tree growth is easy to obtain in pear breeding. Because a valuable type of tree habit for modern plantation is with a spurred growth habit and strong apical control, it can be appreciated that Milenium (a relative new cultivar created at Fruit Research Station Cluj-Napoca) can be used as genitor for this trait. Especially used as mother genitor in cross with Virgiliu Hibernal (another new cultivar obtained at FRS Cluj), Milenium gave birth to the highest percentage of upright seedlings (16%), and with fastigiate habit (3%).

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