Genetical and Cytological Studies in Hybrid Roses
نویسندگان
چکیده
منابع مشابه
GENETICAL AND CYTOLOGICAL STUDIES IN HYBRID ROSES.* I .—THE ORIGIN OF A FERTILE HEXAPLOID FORM IN THE PlMPINELLIFOLIyE-VlLLOS.E CROSSES
I. Introductory. IN a former communication, in which the British roses were discussed, we showed that cytologically they were divisible into two groups ; one with members in which microspore formation proceeded normally, and a second in which that process exhibited certain definite abnormalities differing only in degree among the different microgenes involved. Moreover, the peculiarities by whi...
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A type of intraspecific hybrid sterility, between two strains of Drosophila melanogaster, referred to as GD (gonadal dysgenesis) sterility, is observed when females from a type of strain called M are crossed with males from a second type called P. Absence of egg-laying is characteristic of female GD sterility and its manifestation is conditional on high developmental temperatures. Morphological...
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TABLE OF CONTENTS PAGE INTRODUCTION.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Crossing over between X and Y chromosomes.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Non-disjunctional males.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 1924
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.1.4.557