Annual report of the North Carolina Agricultural Experiment Station (1917) (14770893811)

Identifier: annualreportofno1917nort (find matches)

Title: Annual report of the North Carolina Agricultural Experiment Station

Year: 1917 (1910s)

Authors: North Carolina Agricultural Experiment Station

Subjects: North Carolina Agricultural Experiment Station Agriculture

Publisher: (Raleigh, N.C.?) : Board of Agriculture

Contributing Library: State Library of North Carolina, Government & Heritage Library

Digitizing Sponsor: LYRASIS Members and Sloan Foundation

Text Appearing Before Image:

spectiveflower clusters. In like manner the progeny of hermaphrodite vines thatbear the reflexed type of stamen, when crossed with pollen from her-maphrodite vines that bear the upright stamens, can be separated andgrouped according to the character of their pollen by nothing more thantheir characteristic flower clusters. These correlated characters are of considerable Importance to therotundifolia grape breeder, because by means of them a comparativelyearly selection and segregation of vines can be made with respect tonormal viable pollen and self-fertility. VI. Similarity Between Flower Clusters That Are Borne onHermaphrodite Vines With Upright Stamens and ThoseThat Are Borne on Staminate Vines. As the staminate vines when in bud, and before any flowers haveopened, can be readily distinguished from the imperfect hermaphroditevines by the difference in the size and shape of their respective flowerclusters (see Fig. 7), so in like manner the perfect hermaphrodite vines The Bulletin 29

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PlG. 11.—Two flower clusters from hermaphrodite vines of the Fi generation of FlowersX Hope. The cluster on the right bears the upright type of stamen, while the clusteron the left bears the reflexed type of stamen. These two clusters are the largest oftheir kind that could be found among 103 vines. Natural size. can be distinguished from the imperfect herniaphrodite vines (see Figs.8, 9, 10, and 11). But a staminate vine and a perfect hermaphroditevine when in bud cannot be so easily distinguished from one another, ifat all. :H) The Bulletin A flower cluster on a perfect hermaphrodite vine, like one on astaminate vine, normally consists of a great many flowers crowdedtogether on a more or less lengthened rachis (see Figs. 7, 8, 11, and 12).The largest number of buds that were ever counted in a single flowercluster on a staminate vine was 384 and on a perfect hermaphroditevine (Hope) 299. This staminate vine, however, is one of the best everobserved by the writer among wild vines, w

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1917

State Library of North Carolina

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