48 - Predicting the combining ability of recessive traits...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Index: GrowFAQ : What is combining ability? Added by: MR_NATURAL420 Last edited by: Team GrowFAQ Viewed: 997 times Rated by 2 users: 10.00/10 Certain inbred lines will display hybrid vigour when crossed. These vigorous lines are said to have favorable combining ability. Certain inbreds have the ability to combine well with testers--these have general combining ability (GCA). When the inbred combines well only in certain crosses, it has specific combining ability (SCA). The only way to select for combining ability is to grow and examine the progeny. An astute breeder can recognize the potentital for hybrid vigour by identifying the dominant traits of the parents and deducing which lines may combine favorably.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Predicting the combining ability of recessive traits can only be determined through progeny testing . The breeder is interested in single crosses (also known as F1 generations) that outperform other single crosses. If the breeder has multiple IBLs to work with, she could select first for GCA, then for SCA among the lines with GCA, then identify the best parental gene donors. In most cases with Cannabis you can go directly to selecting for specific combining ability between your IBL and your testers. Last modified: 23:53 - Nov 10, 2000 Quicklink: http://overgrow.com/growfaq/48 GrowFAQ © 2000-2004 Overgrow faq:48 "What is combining ability?" Compiled by QMP3T...
View Full Document

This note was uploaded on 09/17/2009 for the course BIO 328 taught by Professor Roux during the Spring '08 term at University of Texas.

Ask a homework question - tutors are online